IPWorks MQ 2022 Python Edition
Version 22.0 [Build 8369]

AMQP Class

Properties   Methods   Events   Config Settings   Errors  

An easy-to-use AMQP 1.0 client implementation.

Syntax

class ipworksmq.AMQP

Remarks

The AMQP class provides an easy-to-use AMQP 1.0 client implementation. The class supports both plaintext and TLS-enabled connections over TCP.

Connecting

AMQP 1.0's transport protocol has three layers: an overarching connection between two containers, the sessions opened on that connection, and the links (between the containers' nodes) attached to those sessions.

The class implements all three layers of the AMQP 1.0 transport protocol, so the first step is to initiate the overall connection. Set the container_id property and call the connect_to method, passing it the server's hostname and port number.

Once connected, the next step is to create at least one session, which can be accomplished by using the create_session method. The class allows creating any number of sessions, up to the limit specified by the MaxSessionCount configuration setting.

Connecting and Creating a Session amqp1.ContainerId = "testClient"; amqp1.ConnectTo("amqp.test-server.com", 5672); amqp1.CreateSession("TestSession");

After creating a session, the next step is to create one or more links (which are created in the context of a session) so that messages can be sent and/or received. Links are unidirectional, so each one has a sender on one end and a receiver on the other.

The class can function both as a sender node (by opening sender links) and as a receiver node (by opening receiver links). But keep in mind that, since the class is implemented as an AMQP 1.0 client, it must be the one to open links (said another way, the class cannot accept any link requests made by other peers).

As with sessions, the class allows creating any number of links for each session, up to the limit specified by the MaxLinkCountPerSession configuration setting.

Creating Sender Links

To create a sender link, call the create_sender_link method, passing it the name of an existing session, a unique name for the link, and (if necessary in your environment) the name of a target for the receiver to use to ensure messages are routed correctly.

The on_link_ready_to_send event will fire when the newly created sender link is ready to send messages.

Creating a Sender Link amqp1.OnLinkReadyToSend += (s, e) => { Console.WriteLine("Link '" + e.LinkName + "' is ready to send messages!"); }; amqp1.CreateSenderLink("TestSession", "TestSenderLink", "TestTarget");

Sending Messages

To send a message, the first step is to set the Message* properties to the desired values.

At minimum, the message_value and message_value_type properties must be set. All other properties are optional, though specifying a unique value for message_id is recommended. (If the GenerateMessageId configuration setting is enabled, the class will generate one automatically when the message is sent.)

Once the Message* properties have be assigned as desired, call the send_message method, passing it the name of an existing sender link on which the message should be sent.

The on_message_out event will be fired when the message has been sent (and acknowledged, if message_settled was set to false). The on_message_outcome event may also fire, if necessary, once the receiver reports the outcome of the message.

Refer to send_message, on_message_out, and on_message_outcome for more information.

Sending a Message amqp1.OnMessageOut += (s, e) => { Console.WriteLine("Message with Id '" + e.MessageId + "' has been sent on link '" + e.LinkName + "'."); }; amqp1.Message.MessageId = "TestMessageId"; amqp1.Message.Value = "Hello, world!"; amqp1.Message.ValueType = AMQPValueTypes.mvtString; amqp1.SendMessage("TestSenderLink");

The reset_message method can be used to reset the Message* properties to their default values.

Sending Composite AMQP Data

The AMQP 1.0 protocol's data model includes the concept of "composite data". Composite data is comprised of one or more type-value pairs (including data structure types), plus a descriptor that describes what the overall data represents.

The class supports sending composite AMQP data in a message through the use of JSON with a well-defined schema. Refer to the send_message method's documentation for more information and examples.

Creating Receiver Links

Receiver links can operate in one of two receive modes: automatic, where the class will work to ensure that messages are received as soon as they are available; and fetch-based, where the class will only "fetch" a new message when explicitly instructed to.

The receive_mode property controls which receive mode newly-created receiver links will use; refer to its documentation for more information.

After ensuring that receive_mode is set as desired, call create_receiver_link, passing it the name of an existing session, a unique name for the link, and (if necessary in your environment) the name of a source for the sender to route the link creation request to.

Creating a Receiver Link // Creating an automatic receiver link. amqp1.ReceiveMode = AmqpReceiveModes.rmAutomatic; amqp1.CreateReceiverLink("TestSession", "TestAutoReceiverLink", "TestSource1"); // Creating a fetch-based receiver link. amqp1.ReceiveMode = AmqpReceiveModes.rmFetch; amqp1.CreateReceiverLink("TestSession", "TestFetchReceiverLink", "TestSource2");

Receiving Messages

For receiver links created in automatic receive mode (the default), messages are received automatically.

For receiver links created in fetch-based mode, the class will attempt to "fetch" a message each time the fetch_message method is called (optionally timing out after a time, if fetch_timeout is non-zero). When calling fetch_message, pass it the name of a fetch-based receiver link.

Regardless of whether a messages is received automatically or fetched, any incoming message will cause the class to fire the on_message_in event and update the ReceivedMessage* properties.

When the on_message_in event fires, its State event parameter can be used to specify the outcome of the message, which the class will then transmit back to the sender (as well as self-report by firing the on_message_outcome event). Refer to on_message_in for more information.

Receiving a Message // For automatic receiver links, only the event handler is necessary. amqp1.OnMessageIn += (s, e) => { Console.WriteLine("Message with Id '" + e.MessageId + "' has been received on link '" + e.LinkName + "'. Value:"); Console.WriteLine(amqp1.ReceivedMessage.Value); // The message state is already set to the "Accepted" outcome by default, but we'll set it again // for the purpose of this example. e.State = 0; // 0 = Accepted. }; // For fetch-based links, it's also necessary to call FetchMessage(). It is recommended that the // FetchTimeout property be set to a non-zero value (60 seconds is the default) so that the fetch // request will eventually time out if the sender doesn't have any messages available to deliver. amqp1.FetchTimeout = 60; amqp1.FetchMessage("TestFetchReceiverLink");

Property List


The following is the full list of the properties of the class with short descriptions. Click on the links for further details.

auth_schemeThe authentication scheme to use when connecting.
connectedThis property triggers a connection or disconnection.
container_idThe container Id the class should advertise when connecting.
fetch_timeoutHow long the class should wait for a message to be received after FetchMessage is called.
firewall_auto_detectThis property tells the class whether or not to automatically detect and use firewall system settings, if available.
firewall_typeThis property determines the type of firewall to connect through.
firewall_hostThis property contains the name or IP address of firewall (optional).
firewall_passwordThis property contains a password if authentication is to be used when connecting through the firewall.
firewall_portThis property contains the transmission control protocol (TCP) port for the firewall Host .
firewall_userThis property contains a user name if authentication is to be used connecting through a firewall.
idle_timeoutThe maximum period of inactivity the class will allow before disconnecting.
incoming_message_countThe number of records in the IncomingMessage arrays.
incoming_message_absolute_expiry_timeThe absolute time at which this message should be considered expired.
incoming_message_content_encodingThe content encoding of this message's data.
incoming_message_content_typeThe content type of this message's data.
incoming_message_correlation_idThe correlation Id of this message.
incoming_message_creation_timeThe creation time of this message.
incoming_message_delivery_countHow many previous attempts there have been to deliver this message.
incoming_message_durableWhether this message is durable.
incoming_message_first_acquirerWhether this message may have been acquired by other links previously.
incoming_message_group_idThe Id of the group this message belongs to.
incoming_message_group_sequenceThe position of this message within its group.
incoming_message_link_nameThe name of the link this message is associated with.
incoming_message_idThe unique Id of this message.
incoming_message_priorityThe priority of this message.
incoming_message_reply_toThe address of the node to send replies to for this message.
incoming_message_reply_to_group_idThe Id of the group to send replies to for this message.
incoming_message_settledWhether this message is settled.
incoming_message_subjectThe subject of this message.
incoming_message_toThe address of the node which this message is intended for.
incoming_message_ttlThe time-to-live value for this message.
incoming_message_user_idThe identity of the user responsible for producing this message.
incoming_message_valueThis message's value.
incoming_message_value_typeThis message's value data type.
link_countThe number of records in the Link arrays.
link_availableThe number of messages which this link's sender could send if it had credit for them.
link_channel_nameThe channel name this link is using.
link_creditThe amount of credit currently available to this link's sender.
link_delivery_countThe current delivery count value for this link.
link_nameThis link's name.
link_ready_to_sendWhether this link is ready to send a message.
link_receive_modeThe receive mode this link is operating in.
link_roleThe class's role on this link.
local_hostThe name of the local host or user-assigned IP interface through which connections are initiated or accepted.
local_portThe TCP port in the local host where the class binds.
message_absolute_expiry_timeThe absolute time at which this message should be considered expired.
message_content_encodingThe content encoding of this message's data.
message_content_typeThe content type of this message's data.
message_correlation_idThe correlation Id of this message.
message_creation_timeThe creation time of this message.
message_delivery_countHow many previous attempts there have been to deliver this message.
message_durableWhether this message is durable.
message_first_acquirerWhether this message may have been acquired by other links previously.
message_group_idThe Id of the group this message belongs to.
message_group_sequenceThe position of this message within its group.
message_link_nameThe name of the link this message is associated with.
message_idThe unique Id of this message.
message_priorityThe priority of this message.
message_reply_toThe address of the node to send replies to for this message.
message_reply_to_group_idThe Id of the group to send replies to for this message.
message_settledWhether this message is settled.
message_subjectThe subject of this message.
message_toThe address of the node which this message is intended for.
message_ttlThe time-to-live value for this message.
message_user_idThe identity of the user responsible for producing this message.
message_valueThis message's value.
message_value_typeThis message's value data type.
outgoing_message_countThe number of records in the OutgoingMessage arrays.
outgoing_message_absolute_expiry_timeThe absolute time at which this message should be considered expired.
outgoing_message_content_encodingThe content encoding of this message's data.
outgoing_message_content_typeThe content type of this message's data.
outgoing_message_correlation_idThe correlation Id of this message.
outgoing_message_creation_timeThe creation time of this message.
outgoing_message_delivery_countHow many previous attempts there have been to deliver this message.
outgoing_message_durableWhether this message is durable.
outgoing_message_first_acquirerWhether this message may have been acquired by other links previously.
outgoing_message_group_idThe Id of the group this message belongs to.
outgoing_message_group_sequenceThe position of this message within its group.
outgoing_message_link_nameThe name of the link this message is associated with.
outgoing_message_idThe unique Id of this message.
outgoing_message_priorityThe priority of this message.
outgoing_message_reply_toThe address of the node to send replies to for this message.
outgoing_message_reply_to_group_idThe Id of the group to send replies to for this message.
outgoing_message_settledWhether this message is settled.
outgoing_message_subjectThe subject of this message.
outgoing_message_toThe address of the node which this message is intended for.
outgoing_message_ttlThe time-to-live value for this message.
outgoing_message_user_idThe identity of the user responsible for producing this message.
outgoing_message_valueThis message's value.
outgoing_message_value_typeThis message's value data type.
passwordA password to use for SASL authentication.
ready_to_sendIndicates whether the class is ready to send data.
received_message_absolute_expiry_timeThe absolute time at which this message should be considered expired.
received_message_content_encodingThe content encoding of this message's data.
received_message_content_typeThe content type of this message's data.
received_message_correlation_idThe correlation Id of this message.
received_message_creation_timeThe creation time of this message.
received_message_delivery_countHow many previous attempts there have been to deliver this message.
received_message_durableWhether this message is durable.
received_message_first_acquirerWhether this message may have been acquired by other links previously.
received_message_group_idThe Id of the group this message belongs to.
received_message_group_sequenceThe position of this message within its group.
received_message_link_nameThe name of the link this message is associated with.
received_message_idThe unique Id of this message.
received_message_priorityThe priority of this message.
received_message_reply_toThe address of the node to send replies to for this message.
received_message_reply_to_group_idThe Id of the group to send replies to for this message.
received_message_settledWhether this message is settled.
received_message_subjectThe subject of this message.
received_message_toThe address of the node which this message is intended for.
received_message_ttlThe time-to-live value for this message.
received_message_user_idThe identity of the user responsible for producing this message.
received_message_valueThis message's value.
received_message_value_typeThis message's value data type.
receive_modeControls what mode new receiver links are created with.
remote_hostThis property includes the address of the remote host. Domain names are resolved to IP addresses.
remote_portThe port of the AQMP server (default is 5672). The default port for SSL is 5671.
session_countThe number of records in the Session arrays.
session_incoming_windowThe incoming window size of this session.
session_nameThe name of this session.
session_outgoing_windowThe outgoing window size of this session.
ssl_accept_server_cert_encodedThis is the certificate (PEM/base64 encoded).
ssl_cert_encodedThis is the certificate (PEM/base64 encoded).
ssl_cert_storeThis is the name of the certificate store for the client certificate.
ssl_cert_store_passwordIf the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.
ssl_cert_store_typeThis is the type of certificate store for this certificate.
ssl_cert_subjectThis is the subject of the certificate used for client authentication.
ssl_enabledWhether TLS/SSL is enabled.
ssl_providerThis specifies the SSL/TLS implementation to use.
ssl_server_cert_encodedThis is the certificate (PEM/base64 encoded).
timeoutA timeout for the class.
userA username to use for SASL authentication.

Method List


The following is the full list of the methods of the class with short descriptions. Click on the links for further details.

close_linkCloses a link.
close_sessionCloses a session.
configSets or retrieves a configuration setting.
connectThis method connects to a remote host.
connect_toThis method connects to a remote host.
create_receiver_linkCreates a new receiver link with the given name on the specified session.
create_sender_linkCreates a new sender link with the given name on the specified session.
create_sessionCreates a new session with the given name.
disconnectThis method disconnects from the remote host.
do_eventsProcesses events from the internal message queue.
fetch_messageFetches a single message over the specified receiver link.
interruptThis method interrupts the current action.
resetReset the class.
reset_messageResets the Message properties.
send_messageSends a message on the specified link.

Event List


The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.

on_connectedThis event is fired immediately after a connection completes (or fails).
on_connection_statusThis event is fired to indicate changes in the connection state.
on_disconnectedThis event is fired when a connection is closed.
on_errorInformation about errors during data delivery.
on_link_ready_to_sendFires when a sender link is ready to send messages.
on_logFires once for each log message.
on_message_inFires when the class receives a message.
on_message_outFires when the class sends a message.
on_message_outcomeFires when a message's outcome is available.
on_ssl_server_authenticationFired after the server presents its certificate to the client.
on_ssl_statusShows the progress of the secure connection.

Config Settings


The following is a list of config settings for the class with short descriptions. Click on the links for further details.

AuthorizationIdentityThe value to use as the authorization identity when SASL authentication is used.
DefaultCreditThe amount of credit to create new receiver links with.
DefaultCreditThresholdThe credit threshold to create new receiver links with.
DefaultIncomingWindowThe incoming window size to create new sessions with.
DefaultOutgoingWindowThe outgoing window size to create new sessions with.
DefaultSenderSettleModeThe sender settle mode to create new links with.
GenerateMessageIdWhether a unique message Id should be automatically generated when sending a message.
LogLevelThe level of detail that is logged.
MaxFrameSizeThe maximum frame size.
MaxLinkCountPerSessionThe maximum number of links to restrict new sessions to.
MaxMessageSizeThe maximum message size to restrict new links to.
MaxSessionCountThe maximum number of sessions.
ModifiedDeliveryFailedWhether the sender should treat this transfer as an unsuccessful delivery attempt.
ModifiedMessageAnnotationsThe message annotations that the sender should merge into those already on the message.
ModifiedUndeliverableHereWhether the receiver has indicated that the sender should not attempt to redeliver the message.
ProtocolVersionThe AMQP protocol version to conform to.
RejectErrorConditionThe error condition included with a 'Rejected' delivery outcome.
RejectErrorDescriptionThe error description included with a 'Rejected' delivery outcome.
SenderSettleMode[LinkName]Retrieves the negotiated sender settle mode for the specified link.
SimplifiedJSONFormatWhether to output simplified JSON where possible.
ConnectionTimeoutSets a separate timeout value for establishing a connection.
FirewallAutoDetectTells the class whether or not to automatically detect and use firewall system settings, if available.
FirewallHostName or IP address of firewall (optional).
FirewallPasswordPassword to be used if authentication is to be used when connecting through the firewall.
FirewallPortThe TCP port for the FirewallHost;.
FirewallTypeDetermines the type of firewall to connect through.
FirewallUserA user name if authentication is to be used connecting through a firewall.
KeepAliveIntervalThe retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.
KeepAliveTimeThe inactivity time in milliseconds before a TCP keep-alive packet is sent.
LingerWhen set to True, connections are terminated gracefully.
LingerTimeTime in seconds to have the connection linger.
LocalHostThe name of the local host through which connections are initiated or accepted.
LocalPortThe port in the local host where the class binds.
MaxLineLengthThe maximum amount of data to accumulate when no EOL is found.
MaxTransferRateThe transfer rate limit in bytes per second.
ProxyExceptionsListA semicolon separated list of hosts and IPs to bypass when using a proxy.
TCPKeepAliveDetermines whether or not the keep alive socket option is enabled.
TcpNoDelayWhether or not to delay when sending packets.
UseIPv6Whether to use IPv6.
LogSSLPacketsControls whether SSL packets are logged when using the internal security API.
OpenSSLCADirThe path to a directory containing CA certificates.
OpenSSLCAFileName of the file containing the list of CA's trusted by your application.
OpenSSLCipherListA string that controls the ciphers to be used by SSL.
OpenSSLPrngSeedDataThe data to seed the pseudo random number generator (PRNG).
ReuseSSLSessionDetermines if the SSL session is reused.
SSLCACertFilePathsThe paths to CA certificate files on Unix/Linux.
SSLCACertsA newline separated list of CA certificate to use during SSL client authentication.
SSLCheckCRLWhether to check the Certificate Revocation List for the server certificate.
SSLCipherStrengthThe minimum cipher strength used for bulk encryption.
SSLEnabledCipherSuitesThe cipher suite to be used in an SSL negotiation.
SSLEnabledProtocolsUsed to enable/disable the supported security protocols.
SSLEnableRenegotiationWhether the renegotiation_info SSL extension is supported.
SSLIncludeCertChainWhether the entire certificate chain is included in the SSLServerAuthentication event.
SSLKeyLogFileThe location of a file where per-session secrets are written for debugging purposes.
SSLNegotiatedCipherReturns the negotiated ciphersuite.
SSLNegotiatedCipherStrengthReturns the negotiated ciphersuite strength.
SSLNegotiatedCipherSuiteReturns the negotiated ciphersuite.
SSLNegotiatedKeyExchangeReturns the negotiated key exchange algorithm.
SSLNegotiatedKeyExchangeStrengthReturns the negotiated key exchange algorithm strength.
SSLNegotiatedVersionReturns the negotiated protocol version.
SSLSecurityFlagsFlags that control certificate verification.
SSLServerCACertsA newline separated list of CA certificate to use during SSL server certificate validation.
TLS12SignatureAlgorithmsDefines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.
TLS12SupportedGroupsThe supported groups for ECC.
TLS13KeyShareGroupsThe groups for which to pregenerate key shares.
TLS13SignatureAlgorithmsThe allowed certificate signature algorithms.
TLS13SupportedGroupsThe supported groups for (EC)DHE key exchange.
AbsoluteTimeoutDetermines whether timeouts are inactivity timeouts or absolute timeouts.
FirewallDataUsed to send extra data to the firewall.
InBufferSizeThe size in bytes of the incoming queue of the socket.
OutBufferSizeThe size in bytes of the outgoing queue of the socket.

auth_scheme Property

The authentication scheme to use when connecting.

Syntax

def get_auth_scheme() -> int: ...
def set_auth_scheme(value: int) -> None: ...

auth_scheme = property(get_auth_scheme, set_auth_scheme)

Default Value

2

Remarks

This property controls what authentication scheme the class should use when connecting to the remote host.

Valid values are:

  • smNone (0)
  • smSASLAnonymous (1)
  • smSASLPlain (2) - Default
  • smSASLExternal (3)

connected Property

This property triggers a connection or disconnection.

Syntax

def get_connected() -> bool: ...
def set_connected(value: bool) -> None: ...

connected = property(get_connected, set_connected)

Default Value

FALSE

Remarks

This property triggers a connection or disconnection. Setting this property to True makes the class attempt to connect to the host identified by the remote_host property. If successful, after the connection is achieved, the value of the property changes to True and the on_connected event is fired.

Setting this property to False closes the connection. How and when the connection is closed is controlled by the linger property.

Note: It is recommended to use the connect or disconnect method instead of setting this property.

container_id Property

The container Id the class should advertise when connecting.

Syntax

def get_container_id() -> str: ...
def set_container_id(value: str) -> None: ...

container_id = property(get_container_id, set_container_id)

Default Value

""

Remarks

This property specifies the container Id that the class should advertise when it's connecting to the remote host.

In AMQP, the top-level organizational grouping is called a "container", and each container can contain zero or more "nodes", which are the actual entities which send and receive messages over links.

Since this class handles multiple layers of the AMQP transport protocol (the overall connection, the sessions in that connection, and the links attached to those sessions), it must be given a unique container Id.

Note: The container Id cannot be changed while connected.

fetch_timeout Property

How long the class should wait for a message to be received after FetchMessage is called.

Syntax

def get_fetch_timeout() -> int: ...
def set_fetch_timeout(value: int) -> None: ...

fetch_timeout = property(get_fetch_timeout, set_fetch_timeout)

Default Value

60

Remarks

This property controls how long, in seconds, the class will wait for a message to be received after fetch_message is called before timing out the request. If set to zero, the class will wait indefinitely.

Refer to fetch_message for more information.

firewall_auto_detect Property

This property tells the class whether or not to automatically detect and use firewall system settings, if available.

Syntax

def get_firewall_auto_detect() -> bool: ...
def set_firewall_auto_detect(value: bool) -> None: ...

firewall_auto_detect = property(get_firewall_auto_detect, set_firewall_auto_detect)

Default Value

FALSE

Remarks

This property tells the class whether or not to automatically detect and use firewall system settings, if available.

firewall_type Property

This property determines the type of firewall to connect through.

Syntax

def get_firewall_type() -> int: ...
def set_firewall_type(value: int) -> None: ...

firewall_type = property(get_firewall_type, set_firewall_type)

Default Value

0

Remarks

This property determines the type of firewall to connect through. The applicable values are as follows:

fwNone (0)No firewall (default setting).
fwTunnel (1)Connect through a tunneling proxy. firewall_port is set to 80.
fwSOCKS4 (2)Connect through a SOCKS4 Proxy. firewall_port is set to 1080.
fwSOCKS5 (3)Connect through a SOCKS5 Proxy. firewall_port is set to 1080.
fwSOCKS4A (10)Connect through a SOCKS4A Proxy. firewall_port is set to 1080.

firewall_host Property

This property contains the name or IP address of firewall (optional).

Syntax

def get_firewall_host() -> str: ...
def set_firewall_host(value: str) -> None: ...

firewall_host = property(get_firewall_host, set_firewall_host)

Default Value

""

Remarks

This property contains the name or IP address of firewall (optional). If a firewall_host is given, the requested connections will be authenticated through the specified firewall when connecting.

If this property is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, the class fails with an error.

firewall_password Property

This property contains a password if authentication is to be used when connecting through the firewall.

Syntax

def get_firewall_password() -> str: ...
def set_firewall_password(value: str) -> None: ...

firewall_password = property(get_firewall_password, set_firewall_password)

Default Value

""

Remarks

This property contains a password if authentication is to be used when connecting through the firewall. If firewall_host is specified, the firewall_user and firewall_password properties are used to connect and authenticate to the given firewall. If the authentication fails, the class fails with an error.

firewall_port Property

This property contains the transmission control protocol (TCP) port for the firewall Host .

Syntax

def get_firewall_port() -> int: ...
def set_firewall_port(value: int) -> None: ...

firewall_port = property(get_firewall_port, set_firewall_port)

Default Value

0

Remarks

This property contains the transmission control protocol (TCP) port for the firewall firewall_host. See the description of the firewall_host property for details.

Note: This property is set automatically when firewall_type is set to a valid value. See the description of the firewall_type property for details.

firewall_user Property

This property contains a user name if authentication is to be used connecting through a firewall.

Syntax

def get_firewall_user() -> str: ...
def set_firewall_user(value: str) -> None: ...

firewall_user = property(get_firewall_user, set_firewall_user)

Default Value

""

Remarks

This property contains a user name if authentication is to be used connecting through a firewall. If the firewall_host is specified, this property and firewall_password properties are used to connect and authenticate to the given firewall. If the authentication fails, the class fails with an error.

idle_timeout Property

The maximum period of inactivity the class will allow before disconnecting.

Syntax

def get_idle_timeout() -> int: ...
def set_idle_timeout(value: int) -> None: ...

idle_timeout = property(get_idle_timeout, set_idle_timeout)

Default Value

0

Remarks

This property controls how long, in seconds, the class will allow the connection to sit idle before it disconnects from the remote host.

This property may be set to 0 to prevent the class from ever closing the connection due to inactivity.

Note: The idle timeout cannot be changed while connected.

incoming_message_count Property

The number of records in the IncomingMessage arrays.

Syntax

def get_incoming_message_count() -> int: ...

incoming_message_count = property(get_incoming_message_count, None)

Default Value

0

Remarks

This property controls the size of the following arrays:

The array indices start at 0 and end at incoming_message_count - 1.

This property is read-only.

incoming_message_absolute_expiry_time Property

The absolute time at which this message should be considered expired.

Syntax

def get_incoming_message_absolute_expiry_time(incoming_message_index: int) -> int: ...

Default Value

0

Remarks

The absolute time at which this message should be considered expired.

This property specifies the absolute time at which this message should be considered expired. It may be -1 if this message does not have an absolute expiry time.

This property's value should be specified in milliseconds relative to the Unix epoch (January 1, 1970 00:00:00 UTC).

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_content_encoding Property

The content encoding of this message's data.

Syntax

def get_incoming_message_content_encoding(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The content encoding of this message's data.

This property specifies the content encoding of this message's data. It may be empty if this message does not have a content encoding set.

When constructing a message for sending, this property is ignored if incoming_message_value_type is not set to mvtBinary (16).

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_content_type Property

The content type of this message's data.

Syntax

def get_incoming_message_content_type(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The content type of this message's data.

This property specifies the content type of this message's data. It may be empty if this message does not have a content type set.

When constructing a message for sending, this property is ignored if incoming_message_value_type is not set to mvtBinary (16).

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_correlation_id Property

The correlation Id of this message.

Syntax

def get_incoming_message_correlation_id(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The correlation Id of this message.

This property specifies the correlation Id of this message. It may be empty if this message does not have a correlation Id.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_creation_time Property

The creation time of this message.

Syntax

def get_incoming_message_creation_time(incoming_message_index: int) -> int: ...

Default Value

0

Remarks

The creation time of this message.

This property specifies the absolute creation time of this message. It may be -1 if this message does not have a creation time set.

This property's value should be specified in milliseconds relative to the Unix epoch (January 1, 1970 00:00:00 UTC).

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_delivery_count Property

How many previous attempts there have been to deliver this message.

Syntax

def get_incoming_message_delivery_count(incoming_message_index: int) -> int: ...

Default Value

0

Remarks

How many previous attempts there have been to deliver this message.

This property indicates how many (unsuccessful) previous attempts there have been to deliver this message.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_durable Property

Whether this message is durable.

Syntax

def get_incoming_message_durable(incoming_message_index: int) -> bool: ...

Default Value

FALSE

Remarks

Whether this message is durable.

This property specifies whether this message is durable or not.

If a message is marked as durable, any intermediate nodes which cannot guarantee that the message won't be lost under any circumstances will not accept the message.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_first_acquirer Property

Whether this message may have been acquired by other links previously.

Syntax

def get_incoming_message_first_acquirer(incoming_message_index: int) -> bool: ...

Default Value

FALSE

Remarks

Whether this message may have been acquired by other links previously.

This property specifies whether this message might have previously been acquired by other links.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_group_id Property

The Id of the group this message belongs to.

Syntax

def get_incoming_message_group_id(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The Id of the group this message belongs to.

This property specifies the Id of the group that this message belongs to. It may be empty if this message does not belong to a group.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_group_sequence Property

The position of this message within its group.

Syntax

def get_incoming_message_group_sequence(incoming_message_index: int) -> int: ...

Default Value

0

Remarks

The position of this message within its group.

This property specifies the relative position of this message within its group. It may be -1 if this message does not belong to a group.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_link_name Property

The name of the link this message is associated with.

Syntax

def get_incoming_message_link_name(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The name of the link this message is associated with.

This property holds the name of the link which this message is being sent/was received on.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_id Property

The unique Id of this message.

Syntax

def get_incoming_message_id(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The unique Id of this message.

This property holds the unique Id of this message. It may be empty if this message does not have a unique Id.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_priority Property

The priority of this message.

Syntax

def get_incoming_message_priority(incoming_message_index: int) -> int: ...

Default Value

4

Remarks

The priority of this message.

This property holds the priority of this message; the default is 4 (as defined by the AMQP specification).

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_reply_to Property

The address of the node to send replies to for this message.

Syntax

def get_incoming_message_reply_to(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The address of the node to send replies to for this message.

This property specifies the address of the node to send replies to for this message. It may be empty if this message does not have a specific reply-to node address.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_reply_to_group_id Property

The Id of the group to send replies to for this message.

Syntax

def get_incoming_message_reply_to_group_id(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The Id of the group to send replies to for this message.

This property specifies the Id of the group to send replies to for this message. It may be empty if there is not a specific reply-to group for this message.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_settled Property

Whether this message is settled.

Syntax

def get_incoming_message_settled(incoming_message_index: int) -> bool: ...

Default Value

TRUE

Remarks

Whether this message is settled.

This property specifies whether this message is settled or not.

Note that, when constructing a message for sending, this property is ignored if the send settle mode of the link it is sent on is not Mixed (2).

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_subject Property

The subject of this message.

Syntax

def get_incoming_message_subject(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The subject of this message.

This property specifies the subject of this message. It may be empty if this message does not have a subject set.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_to Property

The address of the node which this message is intended for.

Syntax

def get_incoming_message_to(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The address of the node which this message is intended for.

This property specifies the address of the node which this message is intended to be delivered to. It my be empty if this message is not intended for a specific destination node.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_ttl Property

The time-to-live value for this message.

Syntax

def get_incoming_message_ttl(incoming_message_index: int) -> int: ...

Default Value

-1

Remarks

The time-to-live value for this message.

This property specifies the time-to-live (TTL) value, in milliseconds, for this message. It may be -1 if this message does not have a TTL.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_user_id Property

The identity of the user responsible for producing this message.

Syntax

def get_incoming_message_user_id(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

The identity of the user responsible for producing this message.

This property specifies the identity of the user responsible for producing this message. It may be empty if no specific user was responsible for creating this message.

A message's user Id may be used for verification or authentication by intermediates and/or the final receiver.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_value Property

This message's value.

Syntax

def get_incoming_message_value(incoming_message_index: int) -> str: ...

Default Value

""

Remarks

This message's value.

This property specifies the value to send in this message. The incoming_message_value_type property should be used to specify the data type of the value.

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

incoming_message_value_type Property

This message's value data type.

Syntax

def get_incoming_message_value_type(incoming_message_index: int) -> int: ...

Default Value

0

Remarks

This message's value data type.

This property specifies the data type of this message's incoming_message_value.

The table below shows the possible value types, their descriptions, and how to format the data assigned to incoming_message_value. All numeric value types should use their standard string formatting (except for the mvtDecimal (12) type, which should be specified as hex-encoded bytes).

Type Description Value Format
mvtNull (0 - default) Null N/A (incoming_message_value is ignored)
mvtBoolean (1) Boolean "True" or "False"
mvtUbyte (2) Unsigned byte 0 to 255
mvtUshort (3) Unsigned short 0 to 65535
mvtUint (4) Unsigned integer 0 to 4294967295
mvtUlong (5) Unsigned long 0 to 18446744073709551615
mvtByte (6) Byte -128 to 127
mvtShort (7) Short -32768 to 32767
mvtInt (8) Integer -2147483648 to 2147483647
mvtLong (9) Long -9223372036854775808 to 9223372036854775807
mvtFloat (10) Float IEEE 754 32-bit floating point number
mvtDouble (11) Double IEEE 754 64-bit floating point number
mvtDecimal (12) Decimal Hex-encoded byte string
mvtChar (13) Char Single character
mvtTimestamp (14) Timestamp Number of milliseconds since the Unix epoch (January 1, 1970 00:00:00 UTC).
mvtUuid (15) UUID Hex-encoded UUID in the form XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX (hyphens optional, case-insensitive)
mvtBinary (16) Binary data Hex-encoded byte string
mvtString (17) String String
mvtSymbol (18) Symbolic value ASCII string
mvtJson (19) Composite data Composite data JSON structured according to the schema shown in the send_message method's documentation

The incoming_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the incoming_message_count property.

This property is read-only.

link_count Property

The number of records in the Link arrays.

Syntax

def get_link_count() -> int: ...

link_count = property(get_link_count, None)

Default Value

0

Remarks

This property controls the size of the following arrays:

The array indices start at 0 and end at link_count - 1.

This property is read-only.

link_available Property

The number of messages which this link's sender could send if it had credit for them.

Syntax

def get_link_available(link_index: int) -> int: ...

Default Value

0

Remarks

The number of messages which this link's sender could send if it had credit for them.

This property returns the number of messages which this link's sender has indicated that it could send if it had the credit to do so.

The link_index parameter specifies the index of the item in the array. The size of the array is controlled by the link_count property.

This property is read-only.

link_channel_name Property

The channel name this link is using.

Syntax

def get_link_channel_name(link_index: int) -> str: ...

Default Value

""

Remarks

The channel name this link is using.

This property holds the channel name this link is using.

The link_index parameter specifies the index of the item in the array. The size of the array is controlled by the link_count property.

This property is read-only.

link_credit Property

The amount of credit currently available to this link's sender.

Syntax

def get_link_credit(link_index: int) -> int: ...

Default Value

0

Remarks

The amount of credit currently available to this link's sender.

This property holds the amount of credit currently available to this link's sender. The sender on a link can only send messages if it has non-zero credit.

The link_index parameter specifies the index of the item in the array. The size of the array is controlled by the link_count property.

This property is read-only.

link_delivery_count Property

The current delivery count value for this link.

Syntax

def get_link_delivery_count(link_index: int) -> int: ...

Default Value

0

Remarks

The current delivery count value for this link.

This property holds the current delivery count value for this link.

The link_index parameter specifies the index of the item in the array. The size of the array is controlled by the link_count property.

This property is read-only.

link_name Property

This link's name.

Syntax

def get_link_name(link_index: int) -> str: ...

Default Value

""

Remarks

This link's name.

This property holds this link's name.

The link_index parameter specifies the index of the item in the array. The size of the array is controlled by the link_count property.

This property is read-only.

link_ready_to_send Property

Whether this link is ready to send a message.

Syntax

def get_link_ready_to_send(link_index: int) -> bool: ...

Default Value

FALSE

Remarks

Whether this link is ready to send a message.

This property reflects whether this link is currently ready to send a message or not; it always returns False if link_role is lrReceiver (1).

The link_index parameter specifies the index of the item in the array. The size of the array is controlled by the link_count property.

This property is read-only.

link_receive_mode Property

The receive mode this link is operating in.

Syntax

def get_link_receive_mode(link_index: int) -> int: ...

Default Value

0

Remarks

The receive mode this link is operating in.

This property reflects the receive mode which this link is operating in, if it is a receiver link. (For sender links, this property's value means nothing.) Values can be:

  • lrmAutomatic - Messages will be received automatically
  • lrmFetch - One message will be received after each call to the FetchMessage method.

Refer to receive_mode for more information.

The link_index parameter specifies the index of the item in the array. The size of the array is controlled by the link_count property.

This property is read-only.

link_role Property

The class's role on this link.

Syntax

def get_link_role(link_index: int) -> int: ...

Default Value

0

Remarks

The class's role on this link.

This property reflects which role the class is in for this link. Valid values are:

  • lrSender (0)
  • lrReceiver (1)

The link_index parameter specifies the index of the item in the array. The size of the array is controlled by the link_count property.

This property is read-only.

local_host Property

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

def get_local_host() -> str: ...
def set_local_host(value: str) -> None: ...

local_host = property(get_local_host, set_local_host)

Default Value

""

Remarks

The local_host property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface.

If the class is connected, the local_host property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

NOTE: local_host is not persistent. You must always set it in code, and never in the property window.

local_port Property

The TCP port in the local host where the class binds.

Syntax

def get_local_port() -> int: ...
def set_local_port(value: int) -> None: ...

local_port = property(get_local_port, set_local_port)

Default Value

0

Remarks

This property must be set before a connection is attempted. It instructs the class to bind to a specific port (or communication endpoint) in the local machine.

Setting this property to 0 (default) enables the system to choose an open port at random. The chosen port will be returned by the local_port property after the connection is established.

local_port cannot be changed once a connection is made. Any attempt to set this property when a connection is active will generate an error.

This property is useful when trying to connect to services that require a trusted port in the client side.

message_absolute_expiry_time Property

The absolute time at which this message should be considered expired.

Syntax

def get_message_absolute_expiry_time() -> int: ...
def set_message_absolute_expiry_time(value: int) -> None: ...

message_absolute_expiry_time = property(get_message_absolute_expiry_time, set_message_absolute_expiry_time)

Default Value

0

Remarks

The absolute time at which this message should be considered expired.

This property specifies the absolute time at which this message should be considered expired. It may be -1 if this message does not have an absolute expiry time.

This property's value should be specified in milliseconds relative to the Unix epoch (January 1, 1970 00:00:00 UTC).

message_content_encoding Property

The content encoding of this message's data.

Syntax

def get_message_content_encoding() -> str: ...
def set_message_content_encoding(value: str) -> None: ...

message_content_encoding = property(get_message_content_encoding, set_message_content_encoding)

Default Value

""

Remarks

The content encoding of this message's data.

This property specifies the content encoding of this message's data. It may be empty if this message does not have a content encoding set.

When constructing a message for sending, this property is ignored if message_value_type is not set to mvtBinary (16).

message_content_type Property

The content type of this message's data.

Syntax

def get_message_content_type() -> str: ...
def set_message_content_type(value: str) -> None: ...

message_content_type = property(get_message_content_type, set_message_content_type)

Default Value

""

Remarks

The content type of this message's data.

This property specifies the content type of this message's data. It may be empty if this message does not have a content type set.

When constructing a message for sending, this property is ignored if message_value_type is not set to mvtBinary (16).

message_correlation_id Property

The correlation Id of this message.

Syntax

def get_message_correlation_id() -> str: ...
def set_message_correlation_id(value: str) -> None: ...

message_correlation_id = property(get_message_correlation_id, set_message_correlation_id)

Default Value

""

Remarks

The correlation Id of this message.

This property specifies the correlation Id of this message. It may be empty if this message does not have a correlation Id.

message_creation_time Property

The creation time of this message.

Syntax

def get_message_creation_time() -> int: ...
def set_message_creation_time(value: int) -> None: ...

message_creation_time = property(get_message_creation_time, set_message_creation_time)

Default Value

0

Remarks

The creation time of this message.

This property specifies the absolute creation time of this message. It may be -1 if this message does not have a creation time set.

This property's value should be specified in milliseconds relative to the Unix epoch (January 1, 1970 00:00:00 UTC).

message_delivery_count Property

How many previous attempts there have been to deliver this message.

Syntax

def get_message_delivery_count() -> int: ...
def set_message_delivery_count(value: int) -> None: ...

message_delivery_count = property(get_message_delivery_count, set_message_delivery_count)

Default Value

0

Remarks

How many previous attempts there have been to deliver this message.

This property indicates how many (unsuccessful) previous attempts there have been to deliver this message.

message_durable Property

Whether this message is durable.

Syntax

def get_message_durable() -> bool: ...
def set_message_durable(value: bool) -> None: ...

message_durable = property(get_message_durable, set_message_durable)

Default Value

FALSE

Remarks

Whether this message is durable.

This property specifies whether this message is durable or not.

If a message is marked as durable, any intermediate nodes which cannot guarantee that the message won't be lost under any circumstances will not accept the message.

message_first_acquirer Property

Whether this message may have been acquired by other links previously.

Syntax

def get_message_first_acquirer() -> bool: ...
def set_message_first_acquirer(value: bool) -> None: ...

message_first_acquirer = property(get_message_first_acquirer, set_message_first_acquirer)

Default Value

FALSE

Remarks

Whether this message may have been acquired by other links previously.

This property specifies whether this message might have previously been acquired by other links.

message_group_id Property

The Id of the group this message belongs to.

Syntax

def get_message_group_id() -> str: ...
def set_message_group_id(value: str) -> None: ...

message_group_id = property(get_message_group_id, set_message_group_id)

Default Value

""

Remarks

The Id of the group this message belongs to.

This property specifies the Id of the group that this message belongs to. It may be empty if this message does not belong to a group.

message_group_sequence Property

The position of this message within its group.

Syntax

def get_message_group_sequence() -> int: ...
def set_message_group_sequence(value: int) -> None: ...

message_group_sequence = property(get_message_group_sequence, set_message_group_sequence)

Default Value

0

Remarks

The position of this message within its group.

This property specifies the relative position of this message within its group. It may be -1 if this message does not belong to a group.

message_link_name Property

The name of the link this message is associated with.

Syntax

def get_message_link_name() -> str: ...

message_link_name = property(get_message_link_name, None)

Default Value

""

Remarks

The name of the link this message is associated with.

This property holds the name of the link which this message is being sent/was received on.

This property is read-only.

message_id Property

The unique Id of this message.

Syntax

def get_message_id() -> str: ...
def set_message_id(value: str) -> None: ...

message_id = property(get_message_id, set_message_id)

Default Value

""

Remarks

The unique Id of this message.

This property holds the unique Id of this message. It may be empty if this message does not have a unique Id.

message_priority Property

The priority of this message.

Syntax

def get_message_priority() -> int: ...
def set_message_priority(value: int) -> None: ...

message_priority = property(get_message_priority, set_message_priority)

Default Value

4

Remarks

The priority of this message.

This property holds the priority of this message; the default is 4 (as defined by the AMQP specification).

message_reply_to Property

The address of the node to send replies to for this message.

Syntax

def get_message_reply_to() -> str: ...
def set_message_reply_to(value: str) -> None: ...

message_reply_to = property(get_message_reply_to, set_message_reply_to)

Default Value

""

Remarks

The address of the node to send replies to for this message.

This property specifies the address of the node to send replies to for this message. It may be empty if this message does not have a specific reply-to node address.

message_reply_to_group_id Property

The Id of the group to send replies to for this message.

Syntax

def get_message_reply_to_group_id() -> str: ...
def set_message_reply_to_group_id(value: str) -> None: ...

message_reply_to_group_id = property(get_message_reply_to_group_id, set_message_reply_to_group_id)

Default Value

""

Remarks

The Id of the group to send replies to for this message.

This property specifies the Id of the group to send replies to for this message. It may be empty if there is not a specific reply-to group for this message.

message_settled Property

Whether this message is settled.

Syntax

def get_message_settled() -> bool: ...
def set_message_settled(value: bool) -> None: ...

message_settled = property(get_message_settled, set_message_settled)

Default Value

TRUE

Remarks

Whether this message is settled.

This property specifies whether this message is settled or not.

Note that, when constructing a message for sending, this property is ignored if the send settle mode of the link it is sent on is not Mixed (2).

message_subject Property

The subject of this message.

Syntax

def get_message_subject() -> str: ...
def set_message_subject(value: str) -> None: ...

message_subject = property(get_message_subject, set_message_subject)

Default Value

""

Remarks

The subject of this message.

This property specifies the subject of this message. It may be empty if this message does not have a subject set.

message_to Property

The address of the node which this message is intended for.

Syntax

def get_message_to() -> str: ...
def set_message_to(value: str) -> None: ...

message_to = property(get_message_to, set_message_to)

Default Value

""

Remarks

The address of the node which this message is intended for.

This property specifies the address of the node which this message is intended to be delivered to. It my be empty if this message is not intended for a specific destination node.

message_ttl Property

The time-to-live value for this message.

Syntax

def get_message_ttl() -> int: ...
def set_message_ttl(value: int) -> None: ...

message_ttl = property(get_message_ttl, set_message_ttl)

Default Value

-1

Remarks

The time-to-live value for this message.

This property specifies the time-to-live (TTL) value, in milliseconds, for this message. It may be -1 if this message does not have a TTL.

message_user_id Property

The identity of the user responsible for producing this message.

Syntax

def get_message_user_id() -> str: ...
def set_message_user_id(value: str) -> None: ...

message_user_id = property(get_message_user_id, set_message_user_id)

Default Value

""

Remarks

The identity of the user responsible for producing this message.

This property specifies the identity of the user responsible for producing this message. It may be empty if no specific user was responsible for creating this message.

A message's user Id may be used for verification or authentication by intermediates and/or the final receiver.

message_value Property

This message's value.

Syntax

def get_message_value() -> str: ...
def set_message_value(value: str) -> None: ...

message_value = property(get_message_value, set_message_value)

Default Value

""

Remarks

This message's value.

This property specifies the value to send in this message. The message_value_type property should be used to specify the data type of the value.

message_value_type Property

This message's value data type.

Syntax

def get_message_value_type() -> int: ...
def set_message_value_type(value: int) -> None: ...

message_value_type = property(get_message_value_type, set_message_value_type)

Default Value

0

Remarks

This message's value data type.

This property specifies the data type of this message's message_value.

The table below shows the possible value types, their descriptions, and how to format the data assigned to message_value. All numeric value types should use their standard string formatting (except for the mvtDecimal (12) type, which should be specified as hex-encoded bytes).

Type Description Value Format
mvtNull (0 - default) Null N/A (message_value is ignored)
mvtBoolean (1) Boolean "True" or "False"
mvtUbyte (2) Unsigned byte 0 to 255
mvtUshort (3) Unsigned short 0 to 65535
mvtUint (4) Unsigned integer 0 to 4294967295
mvtUlong (5) Unsigned long 0 to 18446744073709551615
mvtByte (6) Byte -128 to 127
mvtShort (7) Short -32768 to 32767
mvtInt (8) Integer -2147483648 to 2147483647
mvtLong (9) Long -9223372036854775808 to 9223372036854775807
mvtFloat (10) Float IEEE 754 32-bit floating point number
mvtDouble (11) Double IEEE 754 64-bit floating point number
mvtDecimal (12) Decimal Hex-encoded byte string
mvtChar (13) Char Single character
mvtTimestamp (14) Timestamp Number of milliseconds since the Unix epoch (January 1, 1970 00:00:00 UTC).
mvtUuid (15) UUID Hex-encoded UUID in the form XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX (hyphens optional, case-insensitive)
mvtBinary (16) Binary data Hex-encoded byte string
mvtString (17) String String
mvtSymbol (18) Symbolic value ASCII string
mvtJson (19) Composite data Composite data JSON structured according to the schema shown in the send_message method's documentation

outgoing_message_count Property

The number of records in the OutgoingMessage arrays.

Syntax

def get_outgoing_message_count() -> int: ...

outgoing_message_count = property(get_outgoing_message_count, None)

Default Value

0

Remarks

This property controls the size of the following arrays:

The array indices start at 0 and end at outgoing_message_count - 1.

This property is read-only.

outgoing_message_absolute_expiry_time Property

The absolute time at which this message should be considered expired.

Syntax

def get_outgoing_message_absolute_expiry_time(outgoing_message_index: int) -> int: ...

Default Value

0

Remarks

The absolute time at which this message should be considered expired.

This property specifies the absolute time at which this message should be considered expired. It may be -1 if this message does not have an absolute expiry time.

This property's value should be specified in milliseconds relative to the Unix epoch (January 1, 1970 00:00:00 UTC).

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_content_encoding Property

The content encoding of this message's data.

Syntax

def get_outgoing_message_content_encoding(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The content encoding of this message's data.

This property specifies the content encoding of this message's data. It may be empty if this message does not have a content encoding set.

When constructing a message for sending, this property is ignored if outgoing_message_value_type is not set to mvtBinary (16).

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_content_type Property

The content type of this message's data.

Syntax

def get_outgoing_message_content_type(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The content type of this message's data.

This property specifies the content type of this message's data. It may be empty if this message does not have a content type set.

When constructing a message for sending, this property is ignored if outgoing_message_value_type is not set to mvtBinary (16).

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_correlation_id Property

The correlation Id of this message.

Syntax

def get_outgoing_message_correlation_id(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The correlation Id of this message.

This property specifies the correlation Id of this message. It may be empty if this message does not have a correlation Id.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_creation_time Property

The creation time of this message.

Syntax

def get_outgoing_message_creation_time(outgoing_message_index: int) -> int: ...

Default Value

0

Remarks

The creation time of this message.

This property specifies the absolute creation time of this message. It may be -1 if this message does not have a creation time set.

This property's value should be specified in milliseconds relative to the Unix epoch (January 1, 1970 00:00:00 UTC).

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_delivery_count Property

How many previous attempts there have been to deliver this message.

Syntax

def get_outgoing_message_delivery_count(outgoing_message_index: int) -> int: ...

Default Value

0

Remarks

How many previous attempts there have been to deliver this message.

This property indicates how many (unsuccessful) previous attempts there have been to deliver this message.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_durable Property

Whether this message is durable.

Syntax

def get_outgoing_message_durable(outgoing_message_index: int) -> bool: ...

Default Value

FALSE

Remarks

Whether this message is durable.

This property specifies whether this message is durable or not.

If a message is marked as durable, any intermediate nodes which cannot guarantee that the message won't be lost under any circumstances will not accept the message.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_first_acquirer Property

Whether this message may have been acquired by other links previously.

Syntax

def get_outgoing_message_first_acquirer(outgoing_message_index: int) -> bool: ...

Default Value

FALSE

Remarks

Whether this message may have been acquired by other links previously.

This property specifies whether this message might have previously been acquired by other links.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_group_id Property

The Id of the group this message belongs to.

Syntax

def get_outgoing_message_group_id(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The Id of the group this message belongs to.

This property specifies the Id of the group that this message belongs to. It may be empty if this message does not belong to a group.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_group_sequence Property

The position of this message within its group.

Syntax

def get_outgoing_message_group_sequence(outgoing_message_index: int) -> int: ...

Default Value

0

Remarks

The position of this message within its group.

This property specifies the relative position of this message within its group. It may be -1 if this message does not belong to a group.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_link_name Property

The name of the link this message is associated with.

Syntax

def get_outgoing_message_link_name(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The name of the link this message is associated with.

This property holds the name of the link which this message is being sent/was received on.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_id Property

The unique Id of this message.

Syntax

def get_outgoing_message_id(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The unique Id of this message.

This property holds the unique Id of this message. It may be empty if this message does not have a unique Id.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_priority Property

The priority of this message.

Syntax

def get_outgoing_message_priority(outgoing_message_index: int) -> int: ...

Default Value

4

Remarks

The priority of this message.

This property holds the priority of this message; the default is 4 (as defined by the AMQP specification).

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_reply_to Property

The address of the node to send replies to for this message.

Syntax

def get_outgoing_message_reply_to(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The address of the node to send replies to for this message.

This property specifies the address of the node to send replies to for this message. It may be empty if this message does not have a specific reply-to node address.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_reply_to_group_id Property

The Id of the group to send replies to for this message.

Syntax

def get_outgoing_message_reply_to_group_id(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The Id of the group to send replies to for this message.

This property specifies the Id of the group to send replies to for this message. It may be empty if there is not a specific reply-to group for this message.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_settled Property

Whether this message is settled.

Syntax

def get_outgoing_message_settled(outgoing_message_index: int) -> bool: ...

Default Value

TRUE

Remarks

Whether this message is settled.

This property specifies whether this message is settled or not.

Note that, when constructing a message for sending, this property is ignored if the send settle mode of the link it is sent on is not Mixed (2).

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_subject Property

The subject of this message.

Syntax

def get_outgoing_message_subject(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The subject of this message.

This property specifies the subject of this message. It may be empty if this message does not have a subject set.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_to Property

The address of the node which this message is intended for.

Syntax

def get_outgoing_message_to(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The address of the node which this message is intended for.

This property specifies the address of the node which this message is intended to be delivered to. It my be empty if this message is not intended for a specific destination node.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_ttl Property

The time-to-live value for this message.

Syntax

def get_outgoing_message_ttl(outgoing_message_index: int) -> int: ...

Default Value

-1

Remarks

The time-to-live value for this message.

This property specifies the time-to-live (TTL) value, in milliseconds, for this message. It may be -1 if this message does not have a TTL.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_user_id Property

The identity of the user responsible for producing this message.

Syntax

def get_outgoing_message_user_id(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

The identity of the user responsible for producing this message.

This property specifies the identity of the user responsible for producing this message. It may be empty if no specific user was responsible for creating this message.

A message's user Id may be used for verification or authentication by intermediates and/or the final receiver.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_value Property

This message's value.

Syntax

def get_outgoing_message_value(outgoing_message_index: int) -> str: ...

Default Value

""

Remarks

This message's value.

This property specifies the value to send in this message. The outgoing_message_value_type property should be used to specify the data type of the value.

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

outgoing_message_value_type Property

This message's value data type.

Syntax

def get_outgoing_message_value_type(outgoing_message_index: int) -> int: ...

Default Value

0

Remarks

This message's value data type.

This property specifies the data type of this message's outgoing_message_value.

The table below shows the possible value types, their descriptions, and how to format the data assigned to outgoing_message_value. All numeric value types should use their standard string formatting (except for the mvtDecimal (12) type, which should be specified as hex-encoded bytes).

Type Description Value Format
mvtNull (0 - default) Null N/A (outgoing_message_value is ignored)
mvtBoolean (1) Boolean "True" or "False"
mvtUbyte (2) Unsigned byte 0 to 255
mvtUshort (3) Unsigned short 0 to 65535
mvtUint (4) Unsigned integer 0 to 4294967295
mvtUlong (5) Unsigned long 0 to 18446744073709551615
mvtByte (6) Byte -128 to 127
mvtShort (7) Short -32768 to 32767
mvtInt (8) Integer -2147483648 to 2147483647
mvtLong (9) Long -9223372036854775808 to 9223372036854775807
mvtFloat (10) Float IEEE 754 32-bit floating point number
mvtDouble (11) Double IEEE 754 64-bit floating point number
mvtDecimal (12) Decimal Hex-encoded byte string
mvtChar (13) Char Single character
mvtTimestamp (14) Timestamp Number of milliseconds since the Unix epoch (January 1, 1970 00:00:00 UTC).
mvtUuid (15) UUID Hex-encoded UUID in the form XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX (hyphens optional, case-insensitive)
mvtBinary (16) Binary data Hex-encoded byte string
mvtString (17) String String
mvtSymbol (18) Symbolic value ASCII string
mvtJson (19) Composite data Composite data JSON structured according to the schema shown in the send_message method's documentation

The outgoing_message_index parameter specifies the index of the item in the array. The size of the array is controlled by the outgoing_message_count property.

This property is read-only.

password Property

A password to use for SASL authentication.

Syntax

def get_password() -> str: ...
def set_password(value: str) -> None: ...

password = property(get_password, set_password)

Default Value

""

Remarks

This property contains a password to use for SASL authentication.

ready_to_send Property

Indicates whether the class is ready to send data.

Syntax

def get_ready_to_send() -> bool: ...

ready_to_send = property(get_ready_to_send, None)

Default Value

FALSE

Remarks

This property indicates that the underlying TCP/IP subsystem is ready to accept data. This is True after connecting to the remote host, and will become False if a call to send_message fails due to a WOULDBLOCK condition.

Once data can be sent again, the on_ready_to_send event will fire and this property will be True.

If a WOULDBLOCK error occurs while sending a message the class will automatically complete the transmission when sending is possible. No action needs to be taken to re-send the message. on_ready_to_send will fire after the class completes any partially sent messages.

This property is read-only.

received_message_absolute_expiry_time Property

The absolute time at which this message should be considered expired.

Syntax

def get_received_message_absolute_expiry_time() -> int: ...

received_message_absolute_expiry_time = property(get_received_message_absolute_expiry_time, None)

Default Value

0

Remarks

The absolute time at which this message should be considered expired.

This property specifies the absolute time at which this message should be considered expired. It may be -1 if this message does not have an absolute expiry time.

This property's value should be specified in milliseconds relative to the Unix epoch (January 1, 1970 00:00:00 UTC).

This property is read-only.

received_message_content_encoding Property

The content encoding of this message's data.

Syntax

def get_received_message_content_encoding() -> str: ...

received_message_content_encoding = property(get_received_message_content_encoding, None)

Default Value

""

Remarks

The content encoding of this message's data.

This property specifies the content encoding of this message's data. It may be empty if this message does not have a content encoding set.

When constructing a message for sending, this property is ignored if received_message_value_type is not set to mvtBinary (16).

This property is read-only.

received_message_content_type Property

The content type of this message's data.

Syntax

def get_received_message_content_type() -> str: ...

received_message_content_type = property(get_received_message_content_type, None)

Default Value

""

Remarks

The content type of this message's data.

This property specifies the content type of this message's data. It may be empty if this message does not have a content type set.

When constructing a message for sending, this property is ignored if received_message_value_type is not set to mvtBinary (16).

This property is read-only.

received_message_correlation_id Property

The correlation Id of this message.

Syntax

def get_received_message_correlation_id() -> str: ...

received_message_correlation_id = property(get_received_message_correlation_id, None)

Default Value

""

Remarks

The correlation Id of this message.

This property specifies the correlation Id of this message. It may be empty if this message does not have a correlation Id.

This property is read-only.

received_message_creation_time Property

The creation time of this message.

Syntax

def get_received_message_creation_time() -> int: ...

received_message_creation_time = property(get_received_message_creation_time, None)

Default Value

0

Remarks

The creation time of this message.

This property specifies the absolute creation time of this message. It may be -1 if this message does not have a creation time set.

This property's value should be specified in milliseconds relative to the Unix epoch (January 1, 1970 00:00:00 UTC).

This property is read-only.

received_message_delivery_count Property

How many previous attempts there have been to deliver this message.

Syntax

def get_received_message_delivery_count() -> int: ...

received_message_delivery_count = property(get_received_message_delivery_count, None)

Default Value

0

Remarks

How many previous attempts there have been to deliver this message.

This property indicates how many (unsuccessful) previous attempts there have been to deliver this message.

This property is read-only.

received_message_durable Property

Whether this message is durable.

Syntax

def get_received_message_durable() -> bool: ...

received_message_durable = property(get_received_message_durable, None)

Default Value

FALSE

Remarks

Whether this message is durable.

This property specifies whether this message is durable or not.

If a message is marked as durable, any intermediate nodes which cannot guarantee that the message won't be lost under any circumstances will not accept the message.

This property is read-only.

received_message_first_acquirer Property

Whether this message may have been acquired by other links previously.

Syntax

def get_received_message_first_acquirer() -> bool: ...

received_message_first_acquirer = property(get_received_message_first_acquirer, None)

Default Value

FALSE

Remarks

Whether this message may have been acquired by other links previously.

This property specifies whether this message might have previously been acquired by other links.

This property is read-only.

received_message_group_id Property

The Id of the group this message belongs to.

Syntax

def get_received_message_group_id() -> str: ...

received_message_group_id = property(get_received_message_group_id, None)

Default Value

""

Remarks

The Id of the group this message belongs to.

This property specifies the Id of the group that this message belongs to. It may be empty if this message does not belong to a group.

This property is read-only.

received_message_group_sequence Property

The position of this message within its group.

Syntax

def get_received_message_group_sequence() -> int: ...

received_message_group_sequence = property(get_received_message_group_sequence, None)

Default Value

0

Remarks

The position of this message within its group.

This property specifies the relative position of this message within its group. It may be -1 if this message does not belong to a group.

This property is read-only.

received_message_link_name Property

The name of the link this message is associated with.

Syntax

def get_received_message_link_name() -> str: ...

received_message_link_name = property(get_received_message_link_name, None)

Default Value

""

Remarks

The name of the link this message is associated with.

This property holds the name of the link which this message is being sent/was received on.

This property is read-only.

received_message_id Property

The unique Id of this message.

Syntax

def get_received_message_id() -> str: ...

received_message_id = property(get_received_message_id, None)

Default Value

""

Remarks

The unique Id of this message.

This property holds the unique Id of this message. It may be empty if this message does not have a unique Id.

This property is read-only.

received_message_priority Property

The priority of this message.

Syntax

def get_received_message_priority() -> int: ...

received_message_priority = property(get_received_message_priority, None)

Default Value

4

Remarks

The priority of this message.

This property holds the priority of this message; the default is 4 (as defined by the AMQP specification).

This property is read-only.

received_message_reply_to Property

The address of the node to send replies to for this message.

Syntax

def get_received_message_reply_to() -> str: ...

received_message_reply_to = property(get_received_message_reply_to, None)

Default Value

""

Remarks

The address of the node to send replies to for this message.

This property specifies the address of the node to send replies to for this message. It may be empty if this message does not have a specific reply-to node address.

This property is read-only.

received_message_reply_to_group_id Property

The Id of the group to send replies to for this message.

Syntax

def get_received_message_reply_to_group_id() -> str: ...

received_message_reply_to_group_id = property(get_received_message_reply_to_group_id, None)

Default Value

""

Remarks

The Id of the group to send replies to for this message.

This property specifies the Id of the group to send replies to for this message. It may be empty if there is not a specific reply-to group for this message.

This property is read-only.

received_message_settled Property

Whether this message is settled.

Syntax

def get_received_message_settled() -> bool: ...

received_message_settled = property(get_received_message_settled, None)

Default Value

TRUE

Remarks

Whether this message is settled.

This property specifies whether this message is settled or not.

Note that, when constructing a message for sending, this property is ignored if the send settle mode of the link it is sent on is not Mixed (2).

This property is read-only.

received_message_subject Property

The subject of this message.

Syntax

def get_received_message_subject() -> str: ...

received_message_subject = property(get_received_message_subject, None)

Default Value

""

Remarks

The subject of this message.

This property specifies the subject of this message. It may be empty if this message does not have a subject set.

This property is read-only.

received_message_to Property

The address of the node which this message is intended for.

Syntax

def get_received_message_to() -> str: ...

received_message_to = property(get_received_message_to, None)

Default Value

""

Remarks

The address of the node which this message is intended for.

This property specifies the address of the node which this message is intended to be delivered to. It my be empty if this message is not intended for a specific destination node.

This property is read-only.

received_message_ttl Property

The time-to-live value for this message.

Syntax

def get_received_message_ttl() -> int: ...

received_message_ttl = property(get_received_message_ttl, None)

Default Value

-1

Remarks

The time-to-live value for this message.

This property specifies the time-to-live (TTL) value, in milliseconds, for this message. It may be -1 if this message does not have a TTL.

This property is read-only.

received_message_user_id Property

The identity of the user responsible for producing this message.

Syntax

def get_received_message_user_id() -> str: ...

received_message_user_id = property(get_received_message_user_id, None)

Default Value

""

Remarks

The identity of the user responsible for producing this message.

This property specifies the identity of the user responsible for producing this message. It may be empty if no specific user was responsible for creating this message.

A message's user Id may be used for verification or authentication by intermediates and/or the final receiver.

This property is read-only.

received_message_value Property

This message's value.

Syntax

def get_received_message_value() -> str: ...

received_message_value = property(get_received_message_value, None)

Default Value

""

Remarks

This message's value.

This property specifies the value to send in this message. The received_message_value_type property should be used to specify the data type of the value.

This property is read-only.

received_message_value_type Property

This message's value data type.

Syntax

def get_received_message_value_type() -> int: ...

received_message_value_type = property(get_received_message_value_type, None)

Default Value

0

Remarks

This message's value data type.

This property specifies the data type of this message's received_message_value.

The table below shows the possible value types, their descriptions, and how to format the data assigned to received_message_value. All numeric value types should use their standard string formatting (except for the mvtDecimal (12) type, which should be specified as hex-encoded bytes).

Type Description Value Format
mvtNull (0 - default) Null N/A (received_message_value is ignored)
mvtBoolean (1) Boolean "True" or "False"
mvtUbyte (2) Unsigned byte 0 to 255
mvtUshort (3) Unsigned short 0 to 65535
mvtUint (4) Unsigned integer 0 to 4294967295
mvtUlong (5) Unsigned long 0 to 18446744073709551615
mvtByte (6) Byte -128 to 127
mvtShort (7) Short -32768 to 32767
mvtInt (8) Integer -2147483648 to 2147483647
mvtLong (9) Long -9223372036854775808 to 9223372036854775807
mvtFloat (10) Float IEEE 754 32-bit floating point number
mvtDouble (11) Double IEEE 754 64-bit floating point number
mvtDecimal (12) Decimal Hex-encoded byte string
mvtChar (13) Char Single character
mvtTimestamp (14) Timestamp Number of milliseconds since the Unix epoch (January 1, 1970 00:00:00 UTC).
mvtUuid (15) UUID Hex-encoded UUID in the form XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX (hyphens optional, case-insensitive)
mvtBinary (16) Binary data Hex-encoded byte string
mvtString (17) String String
mvtSymbol (18) Symbolic value ASCII string
mvtJson (19) Composite data Composite data JSON structured according to the schema shown in the send_message method's documentation

This property is read-only.

receive_mode Property

Controls what mode new receiver links are created with.

Syntax

def get_receive_mode() -> int: ...
def set_receive_mode(value: int) -> None: ...

receive_mode = property(get_receive_mode, set_receive_mode)

Default Value

0

Remarks

This property controls which receive mode newly created receiver links should use to receive messages from the sender. Valid values are:

  • rmAutomatic (0 - default)
  • rmFetch (1)

Receiving Messages Automatically

A receiver link operating in rmAutomatic (0) mode strives to ensure that the sender always has sufficient credit so that messages are received as soon as they are available, thus simulating a "subscription-based"/"push-based" messaging model.

In this mode, receiver links will be created with the amount of credit, and the credit threshold, specified by the DefaultCredit and DefaultCreditThreshold configuration settings. Anytime the link's credit reaches the credit threshold, the class will automatically set it back to its initial value.

Fetching Messages On-Demand

A receiver link operating in rmFetch (1) mode requires the fetch_message method to be called in order for a message to be received, thus simulating a "polling"/"pull-based" messaging model.

In this mode, receiver links will be created with no credit (regardless of what DefaultCredit is set to). When fetch_message is called, the class will supply the sender with a single credit and then block until a message is received (if the fetch_timeout property is set to zero).

If fetch_timeout is non-zero, the class will only block for the specified number of seconds; once that time expires, it will instruct the sender to consume the credit. If the sender chooses to consume the credit by incrementing the value of the LinkDeliveryCount property rather than by sending a message, then the class will throw an error indicating a timeout.

Refer to fetch_message and fetch_timeout for more information. amqp.ReceiveMode = AmqpReceiveModes.rmFetch; amqp.CreateReceiverLink("SessionID", "ReceiverLinkName", "SomeTarget");

remote_host Property

This property includes the address of the remote host. Domain names are resolved to IP addresses.

Syntax

def get_remote_host() -> str: ...
def set_remote_host(value: str) -> None: ...

remote_host = property(get_remote_host, set_remote_host)

Default Value

""

Remarks

This property specifies the IP address (IP number in dotted internet format) or the domain name of the remote host. It is set before a connection is attempted and cannot be changed once a connection is established.

If this property is set to a domain name, a DNS request is initiated, and upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, an error is returned.

If the class is configured to use a SOCKS firewall, the value assigned to this property may be preceded with an "*". If this is the case, the host name is passed to the firewall unresolved and the firewall performs the DNS resolution.

Example. Connecting:

TCPClientControl.RemoteHost = "MyHostNameOrIP" TCPClientControl.RemotePort = 777 TCPClientControl.Connected = true

remote_port Property

The port of the AQMP server (default is 5672). The default port for SSL is 5671.

Syntax

def get_remote_port() -> int: ...
def set_remote_port(value: int) -> None: ...

remote_port = property(get_remote_port, set_remote_port)

Default Value

5672

Remarks

This property specifies a service port on the remote host to connect to.

A valid port number (a value between 1 and 65535) is required for the connection to take place. The property must be set before a connection is attempted and cannot be changed once a connection is established. Any attempt to change this property while connected will fail with an error.

session_count Property

The number of records in the Session arrays.

Syntax

def get_session_count() -> int: ...

session_count = property(get_session_count, None)

Default Value

0

Remarks

This property controls the size of the following arrays:

The array indices start at 0 and end at session_count - 1.

This property is read-only.

session_incoming_window Property

The incoming window size of this session.

Syntax

def get_session_incoming_window(session_index: int) -> int: ...

Default Value

0

Remarks

The incoming window size of this session.

This property holds the incoming window size (in frames) of this session.

The session_index parameter specifies the index of the item in the array. The size of the array is controlled by the session_count property.

This property is read-only.

session_name Property

The name of this session.

Syntax

def get_session_name(session_index: int) -> str: ...

Default Value

""

Remarks

The name of this session.

This property holds the name of this session.

The session_index parameter specifies the index of the item in the array. The size of the array is controlled by the session_count property.

This property is read-only.

session_outgoing_window Property

The outgoing window size of this session.

Syntax

def get_session_outgoing_window(session_index: int) -> int: ...

Default Value

0

Remarks

The outgoing window size of this session.

This property holds the outgoing window size (in frames) of this session.

The session_index parameter specifies the index of the item in the array. The size of the array is controlled by the session_count property.

This property is read-only.

ssl_accept_server_cert_encoded Property

This is the certificate (PEM/base64 encoded).

Syntax

def get_ssl_accept_server_cert_encoded() -> bytes: ...
def set_ssl_accept_server_cert_encoded(value: bytes) -> None: ...

ssl_accept_server_cert_encoded = property(get_ssl_accept_server_cert_encoded, set_ssl_accept_server_cert_encoded)

Default Value

""

Remarks

This is the certificate (PEM/base64 encoded). This property is used to assign a specific certificate. The ssl_accept_server_cert_store and ssl_accept_server_cert_subject properties also may be used to specify a certificate.

When ssl_accept_server_cert_encoded is set, a search is initiated in the current ssl_accept_server_cert_store for the private key of the certificate. If the key is found, ssl_accept_server_cert_subject is updated to reflect the full subject of the selected certificate; otherwise, ssl_accept_server_cert_subject is set to an empty string.

ssl_cert_encoded Property

This is the certificate (PEM/base64 encoded).

Syntax

def get_ssl_cert_encoded() -> bytes: ...
def set_ssl_cert_encoded(value: bytes) -> None: ...

ssl_cert_encoded = property(get_ssl_cert_encoded, set_ssl_cert_encoded)

Default Value

""

Remarks

This is the certificate (PEM/base64 encoded). This property is used to assign a specific certificate. The ssl_cert_store and ssl_cert_subject properties also may be used to specify a certificate.

When ssl_cert_encoded is set, a search is initiated in the current ssl_cert_store for the private key of the certificate. If the key is found, ssl_cert_subject is updated to reflect the full subject of the selected certificate; otherwise, ssl_cert_subject is set to an empty string.

ssl_cert_store Property

This is the name of the certificate store for the client certificate.

Syntax

def get_ssl_cert_store() -> bytes: ...
def set_ssl_cert_store(value: bytes) -> None: ...

ssl_cert_store = property(get_ssl_cert_store, set_ssl_cert_store)

Default Value

"MY"

Remarks

This is the name of the certificate store for the client certificate.

The ssl_cert_store_type property denotes the type of the certificate store specified by ssl_cert_store. If the store is password protected, specify the password in ssl_cert_store_password.

ssl_cert_store is used in conjunction with the ssl_cert_subject property to specify client certificates. If ssl_cert_store has a value, and ssl_cert_subject or ssl_cert_encoded is set, a search for a certificate is initiated. Please see the ssl_cert_subject property for details.

Designations of certificate stores are platform-dependent.

The following are designations of the most common User and Machine certificate stores in Windows:

MYA certificate store holding personal certificates with their associated private keys.
CACertifying authority certificates.
ROOTRoot certificates.

When the certificate store type is PFXFile, this property must be set to the name of the file. When the type is PFXBlob, the property must be set to the binary contents of a PFX file (i.e. PKCS12 certificate store).

ssl_cert_store_password Property

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Syntax

def get_ssl_cert_store_password() -> str: ...
def set_ssl_cert_store_password(value: str) -> None: ...

ssl_cert_store_password = property(get_ssl_cert_store_password, set_ssl_cert_store_password)

Default Value

""

Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

ssl_cert_store_type Property

This is the type of certificate store for this certificate.

Syntax

def get_ssl_cert_store_type() -> int: ...
def set_ssl_cert_store_type(value: int) -> None: ...

ssl_cert_store_type = property(get_ssl_cert_store_type, set_ssl_cert_store_type)

Default Value

0

Remarks

This is the type of certificate store for this certificate.

The class supports both public and private keys in a variety of formats. When the cstAuto value is used the class will automatically determine the type. This property can take one of the following values:

0 (cstUser - default)For Windows, this specifies that the certificate store is a certificate store owned by the current user. Note: this store type is not available in Java.
1 (cstMachine)For Windows, this specifies that the certificate store is a machine store. Note: this store type is not available in Java.
2 (cstPFXFile)The certificate store is the name of a PFX (PKCS12) file containing certificates.
3 (cstPFXBlob)The certificate store is a string (binary or base64-encoded) representing a certificate store in PFX (PKCS12) format.
4 (cstJKSFile)The certificate store is the name of a Java Key Store (JKS) file containing certificates. Note: this store type is only available in Java.
5 (cstJKSBlob)The certificate store is a string (binary or base64-encoded) representing a certificate store in Java Key Store (JKS) format. Note: this store type is only available in Java.
6 (cstPEMKeyFile)The certificate store is the name of a PEM-encoded file that contains a private key and an optional certificate.
7 (cstPEMKeyBlob)The certificate store is a string (binary or base64-encoded) that contains a private key and an optional certificate.
8 (cstPublicKeyFile)The certificate store is the name of a file that contains a PEM- or DER-encoded public key certificate.
9 (cstPublicKeyBlob)The certificate store is a string (binary or base64-encoded) that contains a PEM- or DER-encoded public key certificate.
10 (cstSSHPublicKeyBlob)The certificate store is a string (binary or base64-encoded) that contains an SSH-style public key.
11 (cstP7BFile)The certificate store is the name of a PKCS7 file containing certificates.
12 (cstP7BBlob)The certificate store is a string (binary) representing a certificate store in PKCS7 format.
13 (cstSSHPublicKeyFile)The certificate store is the name of a file that contains an SSH-style public key.
14 (cstPPKFile)The certificate store is the name of a file that contains a PPK (PuTTY Private Key).
15 (cstPPKBlob)The certificate store is a string (binary) that contains a PPK (PuTTY Private Key).
16 (cstXMLFile)The certificate store is the name of a file that contains a certificate in XML format.
17 (cstXMLBlob)The certificate store is a string that contains a certificate in XML format.
18 (cstJWKFile)The certificate store is the name of a file that contains a JWK (JSON Web Key).
19 (cstJWKBlob)The certificate store is a string that contains a JWK (JSON Web Key).
20 (cstSecurityKey)The certificate is present on a physical security key accessible via a PKCS11 interface.

To use a security key the necessary data must first be collected using the CertMgr class. The list_store_certificates method may be called after setting cert_store_type to cstSecurityKey, cert_store_password to the PIN, and cert_store to the full path of the PKCS11 dll. The certificate information returned in the on_cert_list event's CertEncoded parameter may be saved for later use.

When using a certificate, pass the previously saved security key information as the ssl_cert_store and set ssl_cert_store_password to the PIN.

Code Example: SSH Authentication with Security Key certmgr.CertStoreType = CertStoreTypes.cstSecurityKey; certmgr.OnCertList += (s, e) => { secKeyBlob = e.CertEncoded; }; certmgr.CertStore = @"C:\Program Files\OpenSC Project\OpenSC\pkcs11\opensc-pkcs11.dll"; certmgr.CertStorePassword = "123456"; //PIN certmgr.ListStoreCertificates(); sftp.SSHCert = new Certificate(CertStoreTypes.cstSecurityKey, secKeyBlob, "123456", "*"); sftp.SSHUser = "test"; sftp.SSHLogon("myhost", 22);

21 (cstBCFKSFile)The certificate store is the name of a file that contains a BCFKS (Bouncy Castle FIPS Key Store). Note: this store type is only available in Java and .NET.
22 (cstBCFKSBlob)The certificate store is a string (binary or base64-encoded) representing a certificate store in BCFKS (Bouncy Castle FIPS Key Store) format. Note: this store type is only available in Java and .NET.
99 (cstAuto)The store type is automatically detected from the input data. This setting may be used with both public and private keys and can detect any of the supported formats automatically.

ssl_cert_subject Property

This is the subject of the certificate used for client authentication.

Syntax

def get_ssl_cert_subject() -> str: ...
def set_ssl_cert_subject(value: str) -> None: ...

ssl_cert_subject = property(get_ssl_cert_subject, set_ssl_cert_subject)

Default Value

""

Remarks

This is the subject of the certificate used for client authentication.

This property must be set after all other certificate properites are set. When this property is set, a search is performed in the current certificate store certificate with matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma separated list of distinguished name fields and values. For instance "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are displayed below.

FieldMeaning
CNCommon Name. This is commonly a host name like www.server.com.
OOrganization
OUOrganizational Unit
LLocality
SState
CCountry
EEmail Address

If a field value contains a comma it must be quoted.

ssl_enabled Property

Whether TLS/SSL is enabled.

Syntax

def get_ssl_enabled() -> bool: ...
def set_ssl_enabled(value: bool) -> None: ...

ssl_enabled = property(get_ssl_enabled, set_ssl_enabled)

Default Value

FALSE

Remarks

This setting specifies whether TLS/SSL is enabled in the class. When False (default) the class operates in plaintext mode. When True TLS/SSL is enabled.

TLS/SSL may also be enabled by setting ssl_start_mode. Setting ssl_start_mode will automatically update this property value.

If the default port (5672) is selected when SSLEnabled is set to true, the port will automatically be changed to the default port for AMQP with SSL (5671). Likewise, if port 5671 is selected when SSLEnabled is set to false, the port will automatically be changed to the default port. If the port has been set to any value other than the default values, it will remain the same when the value of SSLEnabled changes.

ssl_provider Property

This specifies the SSL/TLS implementation to use.

Syntax

def get_ssl_provider() -> int: ...
def set_ssl_provider(value: int) -> None: ...

ssl_provider = property(get_ssl_provider, set_ssl_provider)

Default Value

0

Remarks

This property specifies the SSL/TLS implementation to use. In most cases the default value of 0 (Automatic) is recommended and should not be changed. When set to 0 (Automatic) the class will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.

Possible values are:

0 (sslpAutomatic - default)Automatically selects the appropriate implementation.
1 (sslpPlatform) Uses the platform/system implementation.
2 (sslpInternal) Uses the internal implementation.

Additional Notes

In most cases using the default value (Automatic) is recommended. The class will select a provider depending on the current platform.

When Automatic is selected, on Windows the class will use the platform implementation. On Linux/macOS the class will use the internal implementation. When TLS 1.3 is enabled via SSLEnabledProtocols the internal implementation is used on all platforms.

ssl_server_cert_encoded Property

This is the certificate (PEM/base64 encoded).

Syntax

def get_ssl_server_cert_encoded() -> bytes: ...

ssl_server_cert_encoded = property(get_ssl_server_cert_encoded, None)

Default Value

""

Remarks

This is the certificate (PEM/base64 encoded). This property is used to assign a specific certificate. The ssl_server_cert_store and ssl_server_cert_subject properties also may be used to specify a certificate.

When ssl_server_cert_encoded is set, a search is initiated in the current ssl_server_cert_store for the private key of the certificate. If the key is found, ssl_server_cert_subject is updated to reflect the full subject of the selected certificate; otherwise, ssl_server_cert_subject is set to an empty string.

This property is read-only.

timeout Property

A timeout for the class.

Syntax

def get_timeout() -> int: ...
def set_timeout(value: int) -> None: ...

timeout = property(get_timeout, set_timeout)

Default Value

60

Remarks

If the timeout property is set to 0, all operations return immediately, potentially failing with a WOULDBLOCK error if data cannot be sent immediately.

If timeout is set to a positive value, data is sent in a blocking manner and the class will wait for the operation to complete before returning control. The class will handle any potential WOULDBLOCK errors internally and automatically retry the operation for a maximum of timeout seconds.

The class will use do_events to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not "freeze" and remains responsive.

If timeout expires, and the operation is not yet complete, the class fails with an error.

Please note that by default, all timeouts are inactivity timeouts, i.e. the timeout period is extended by timeout seconds when any amount of data is successfully sent or received.

The default value for the timeout property is 60 seconds.

user Property

A username to use for SASL authentication.

Syntax

def get_user() -> str: ...
def set_user(value: str) -> None: ...

user = property(get_user, set_user)

Default Value

""

Remarks

This property contains a username to use for SASL authentication.

close_link Method

Closes a link.

Syntax

def close_link(name: str) -> None: ...

Remarks

This method closes the link named Name and removes it from the Link* properties. If no link with the given Name exists, an error will be thrown.

close_session Method

Closes a session.

Syntax

def close_session(name: str) -> None: ...

Remarks

This method closes the session named Name and removes it from the Session* properties. If no session with the given Name exists, an error will be thrown.

Any links open on the specified session when this method is called will be automatically closed and removed from the Link* properties.

config Method

Sets or retrieves a configuration setting.

Syntax

def config(configuration_string: str) -> str: ...

Remarks

config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

connect Method

This method connects to a remote host.

Syntax

def connect() -> None: ...

Remarks

This method connects to the remote host specified by remote_host and remote_port. For instance: component.RemoteHost = "MyHostNameOrIP"; component.RemotePort = 7777; component.Connect();

connect_to Method

This method connects to a remote host.

Syntax

def connect_to(host: str, port: int) -> None: ...

Remarks

This method connects to the remote host specified by the Host and Port parameters. For instance: component.ConnectTo("MyHostNameOrIP", 777)

create_receiver_link Method

Creates a new receiver link with the given name on the specified session.

Syntax

def create_receiver_link(session_name: str, name: str, source: str) -> None: ...

Remarks

This method creates a new receiver link with the given Name on the session specified by SessionName and adds it to the Link* properties. If a link (sender or receiver) with the given Name already exists, or if no session with the given SessionName exists, an error will be thrown.

Source may be set to specify the address of the node at the remote host which should act as the sender. This may not be necessary in all environments, in which case an empty string will suffice.

Receiver links can operate in one of two receive modes: automatic, where the class will work to ensure that messages are received as soon as they are available; and fetch-based, where the class will only "fetch" a new message when explicitly instructed to.

The receive_mode property controls which receive mode newly-created receiver links will use; refer to its documentation for more information.

AMQP 1.0's transport protocol has three layers: an overarching connection between two containers, the sessions opened on that connection, and the links (between the containers' nodes) attached to those sessions. amqp.ReceiveMode = AmqpReceiveModes.rmFetch; amqp.CreateReceiverLink("SessionID", "ReceiverLinkName", "SomeTarget");

create_sender_link Method

Creates a new sender link with the given name on the specified session.

Syntax

def create_sender_link(session_name: str, name: str, target: str) -> None: ...

Remarks

This method creates a new sender link with the given Name on the session specified by SessionName and adds it to the Link* properties. If a link (sender or receiver) with the given Name already exists, or if no session with the given SessionName exists, an error will be thrown.

Target may be set to specify the address of the node at the remote host which should act as the receiver. This may not be necessary in all environments, in which case an empty string will suffice.

The on_link_ready_to_send event will fire when a newly-created sender link is ready to send.

Sender links are created using the Mixed settle mode by default, letting the value of the message_settled property control whether each message is settled (the default) or unsettled when it is sent. The DefaultSenderSettleMode configuration setting can be used to control the settle mode that new sender links are created with. Refer to send_message for more information on message settlement in general.

AMQP 1.0's transport protocol has three layers: an overarching connection between two containers, the sessions opened on that connection, and the links (between the containers' nodes) attached to those sessions.

create_session Method

Creates a new session with the given name.

Syntax

def create_session(name: str) -> None: ...

Remarks

This method creates a new session with the given Name and adds it to the Session* properties. If a session with the given Name already exists, an error will be thrown.

AMQP 1.0's transport protocol has three layers: an overarching connection between two containers, the sessions opened on that connection, and the links (between the containers' nodes) attached to those sessions.

disconnect Method

This method disconnects from the remote host.

Syntax

def disconnect() -> None: ...

Remarks

This method disconnects from the remote host. Calling this method is equivalent to setting the connected property to False.

do_events Method

Processes events from the internal message queue.

Syntax

def do_events() -> None: ...

Remarks

When do_events is called, the class processes any available events. If no events are available, it waits for a preset period of time, and then returns.

fetch_message Method

Fetches a single message over the specified receiver link.

Syntax

def fetch_message(link_name: str) -> None: ...

Remarks

When fetch_message is called, the class will supply the sender with a single credit and then block until a message is received (if the fetch_timeout property is set to zero).

If fetch_timeout is non-zero, the class will only block for the specified number of seconds; once that time expires, it will instruct the sender to consume the credit. If the sender chooses to consume the credit by incrementing the value of the LinkDeliveryCount property rather than by sending a message, then the class will throw an error indicating a timeout.

LinkName specifies the receiver link which should fetch a message; if there is no such link, if the specified link is not a receiver link, or if the specified receiver link is not operating in rmSyncGet (1) mode, an error is thrown.

Refer to receive_mode and fetch_timeout for more information.

interrupt Method

This method interrupts the current action.

Syntax

def interrupt() -> None: ...

Remarks

This method interrupts the current action. If you use send_file to upload a file, the class will run synchronously until the upload is completed. This method will allow you to stop the file from uploading without disconnecting from the host.

reset Method

Reset the class.

Syntax

def reset() -> None: ...

Remarks

This method will reset the class's properties to their default values.

reset_message Method

Resets the Message properties.

Syntax

def reset_message() -> None: ...

Remarks

This method resets the Message* properties.

send_message Method

Sends a message on the specified link.

Syntax

def send_message(link_name: str) -> None: ...

Remarks

This method sends a message on the link specified by LinkName.

The Message* properties are used to construct the message to send. At minimum, specify a MessageValue and a MessageValueType; all other properties are optional. The reset_message method can be used to reset the Message* properties. amqp.Message.ValueType = AMQPValueTypes.mvtString; amqp.Message.Value = "Hello World!"; amqp.SendMessage("SenderLinkName");

Message Settlement

AMQP provides the ability to negotiate delivery guarantees through the system of "message settlement". When a link is created, both the sender and the receiver negotiate a settle mode (one for each role) to use. Senders will operate in one of these modes:
  • Settled - All messages will be sent in a settled state.
  • Unsettled - All messages will be sent in an unsettled state.
  • Mixed - Messages may be sent either settled or unsettled.
and receivers will operate in one of these modes:
  • First - Incoming messages will be settled immediately (and the sender will be notified that the message has been received, if the message was not already settled when sent).
  • Second - Incoming messages will be settled after the sender has settled them (and the sender will be notified when a message has been received, if the message was not already settled when sent).

Together, the sender's and receiver's settle modes can form the following delivery guarantees:

Sender's Settle Mode Receiver's Settle Mode Effective Delivery Guarantee
Settled (Any) At most once
Unsettled First At least once
Unsettled Second Exactly once

(Note that, if the sender's settle mode is Mixed, the values in the "Sender's Settle Mode" column apply for each individual message.)

It is important to note that the message settlement system has a big caveat: Whichever party opens the link can only request that the other end use a specific settle mode. For example, if the class opens a sender link, it has control over the sender settle mode it will use, but it can only request that the remote host use a specific receiver settle mode; so if the class requests that the receiver use Second, the receiver can instead choose to use First (if, e.g., it doesn't support Second).

The class currently only ever requests (and itself only supports) the First receiver settle mode since no other AMQP implementations appear to support the Second receiver settle mode at this time.

The class requests (and uses) the Mixed sender settle mode by default, but supports all of the sender settle modes (the default can be changed using the DefaultSenderSettleMode configuration setting). Sender links created with the Mixed sender use the value of the message_settled property to determine whether to send messages as settled or unsettled.

Sending Composite Data

The AMQP 1.0 protocol's data model includes the concept of "composite data". Composite data is comprised of one or more type-value pairs (including data structure types), plus a descriptor that describes what the overall data represents.

Composite Data JSON Schema

The class uses JSON with a well-defined schema to represent composite data. The composite data JSON schema consists almost entirely of "type-value" objects, which hold an AMQP typename and a value. The syntax for a type-value object is:

{
  "type": "typename",
  "value": value
}

The following table provides a complete list of valid typenames, and describes how the associated values should be represented:

Typename Description Value Format
null Null null
boolean Boolean true or false
ubyte Unsigned byte 0 to 255
ushort Unsigned short 0 to 65535
uint Unsigned integer 0 to 4294967295
ulong Unsigned long 0 to 18446744073709551615
byte Byte -128 to 127
short Short -32768 to 32767
int Integer -2147483648 to 2147483647
long Long -9223372036854775808 to 9223372036854775807
float Float [IEEE 754 32-bit floating point number]
double Double [IEEE 754 64-bit floating point number]
decimal Decimal Hex-encoded byte string like "0A1B2C3D"
char Char "c"
timestamp Timestamp [Number of milliseconds since the Unix epoch (January 1, 1970 00:00:00 UTC)]
uuid UUID Hex-encoded UUID string like "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" (hyphens optional, case-insensitive)
binary Binary data Hex-encoded byte string like "0A1B2C3D"
string String "UTF-8 string (correctly escaped for JSON)"
symbol Symbolic value "ASCII string"
array AMQP array JSON array with zero or more type-value objects of the same type
list AMQP list JSON array with zero or more type-value objects
map AMQP map JSON array with even number of type-value objects representing keys and values; no duplicate keys allowed

Note that typenames must be lowercase in order to be parsed correctly.

Arrays, Lists, and Maps

The AMQP data model defines three data structure types: array, list, and map. In the composite data JSON schema, their value is always a JSON array that contains zero or more type-value objects. Data structure types may be nested arbitrarily to any depth.

Note that the array and map data structures each have restrictions on their content:

  • The elements in an array must all be of the same type (e.g., their typenames must match).
  • The elements in a map represent keys (odd-numbered elements) and values (even-numbered elements). There must be an even number of elements (or none), and the values of the "key" elements must be unique.
{
  "type": "map",
  "value": [
    { "type": "symbol", "value": "key1" },
    { "type": "string", "value": "value1" },
    { "type": "symbol", "value": "key2" },
    { "type": "int", "value": 100 }
  ]
}

Described Types

As noted above, AMQP's data model includes the idea of "described types", which is simply a normal AMQP type annotated by a descriptor. The descriptor defines what the data it is associated with represents as a whole.

In the composite data JSON schema, a described type object is just a normal type-value object with an extra "descriptor" property on it (and the "descriptor" property's value is itself a normal type-value object). The syntax for a described type object is:

{
  "descriptor": { "type": "typename", "value": value },
  "type": "typename",
  "value": value
}

Described type objects can be used anywhere that normal type-value objects can be, except as the value of the "descriptor" property for another described type object, which must be a normal type-value object.

Note that, according to the AMQP specification, the type of the descriptor itself ulong or symbol, but the class does not enforce this.

Abbreviated Value Syntax

For brevity, it is possible to abbreviate both normal type-value objects and described type objects when their value type is null, boolean, or string.

For normal type-value objects, instead of using the standard syntax (e.g., { "type": "string", "value": "Hello, world!" }), just use the raw value itself (e.g., "Hello, world!"). Keep in mind that the abbreviated value must still be valid JSON; notably, strings must still be surrounded by quotes (e.g., "value", not value).

The abbreviated syntax for a described type object is a bit different; the "descriptor" property still needs to be associated with the value using a JSON object. To abbreviate a described type object, just exclude the "type" property, like so:

{
  "descriptor": { "type": "typename", "value": value },
  "value": value
}

The abbreviated value syntax can be used anywhere that an unabbreviated type-value object or described type object would normally be used.

The class defaults to using the abbreviated syntax when returning composite data JSON. This can be configured using the SimplifiedJSONFormat configuration setting.

Composite Data JSON Example

{
  "descriptor": { "type": "symbol", "value": "nsoftware:compositeDataExample" },
  "type": "list",
  "value": [
    "Shorthand string value",
    null,
    true,
    { "type": "uuid", "value": "12345678-0000-1000-8000-00805F9B34FB" },
    {
      "type": "array",
      "value": [
        { "type": "uint", "value": 23 },
        { "type": "uint", "value": 52 },
        { "type": "uint", "value": 153325 }
      ]
    },
    {
      "type": "map",
      "value": [
        { "type": "symbol", "value": "name" },
        "Freezer temperature",
        { "type": "symbol", "value": "unit" },
        "Fahrenheit",
        { "type": "symbol", "value": "value" },
        { "type": "int", "value": -2 }
      ]
    },
    {
      "descriptor": { "type": "symbol", "value": "nsoftware:utf8Bytes" },
      "type": "binary",
      "value": "48656C6C6F2C20776F726C6421"
    }
  ]
}

on_connected Event

This event is fired immediately after a connection completes (or fails).

Syntax

class AMQPConnectedEventParams(object):
  @property
  def status_code() -> int: ...

  @property
  def description() -> str: ...

# In class AMQP:
@property
def on_connected() -> Callable[[AMQPConnectedEventParams], None]: ...
@on_connected.setter
def on_connected(event_hook: Callable[[AMQPConnectedEventParams], None]) -> None: ...

Remarks

If the connection is made normally, StatusCode is 0 and Description is "OK".

If the connection fails, StatusCode has the error code returned by the Transmission Control Protocol (TCP)/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error.

Please refer to the Error Codes section for more information.

on_connection_status Event

This event is fired to indicate changes in the connection state.

Syntax

class AMQPConnectionStatusEventParams(object):
  @property
  def connection_event() -> str: ...

  @property
  def status_code() -> int: ...

  @property
  def description() -> str: ...

# In class AMQP:
@property
def on_connection_status() -> Callable[[AMQPConnectionStatusEventParams], None]: ...
@on_connection_status.setter
def on_connection_status(event_hook: Callable[[AMQPConnectionStatusEventParams], None]) -> None: ...

Remarks

The on_connection_status event is fired when the connection state changes: for example, completion of a firewall or proxy connection or completion of a security handshake.

The ConnectionEvent parameter indicates the type of connection event. Values may include the following:

Firewall connection complete.
Secure Sockets Layer (SSL) or S/Shell handshake complete (where applicable).
Remote host connection complete.
Remote host disconnected.
SSL or S/Shell connection broken.
Firewall host disconnected.

StatusCode has the error code returned by the Transmission Control Protocol (TCP)/IP stack. Description contains a description of this code. The value of StatusCode is equal to the value of the error.

on_disconnected Event

This event is fired when a connection is closed.

Syntax

class AMQPDisconnectedEventParams(object):
  @property
  def status_code() -> int: ...

  @property
  def description() -> str: ...

# In class AMQP:
@property
def on_disconnected() -> Callable[[AMQPDisconnectedEventParams], None]: ...
@on_disconnected.setter
def on_disconnected(event_hook: Callable[[AMQPDisconnectedEventParams], None]) -> None: ...

Remarks

If the connection is broken normally, StatusCode is 0 and Description is "OK".

If the connection is broken for any other reason, StatusCode has the error code returned by the Transmission Control Protocol (TCP/IP) subsystem. Description contains a description of this code. The value of StatusCode is equal to the value of the TCP/IP error.

Please refer to the Error Codes section for more information.

on_error Event

Information about errors during data delivery.

Syntax

class AMQPErrorEventParams(object):
  @property
  def error_code() -> int: ...

  @property
  def description() -> str: ...

# In class AMQP:
@property
def on_error() -> Callable[[AMQPErrorEventParams], None]: ...
@on_error.setter
def on_error(event_hook: Callable[[AMQPErrorEventParams], None]) -> None: ...

Remarks

The on_error event is fired in case of exceptional conditions during message processing. Normally the class fails with an error.

ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

on_link_ready_to_send Event

Fires when a sender link is ready to send messages.

Syntax

class AMQPLinkReadyToSendEventParams(object):
  @property
  def link_name() -> str: ...

  @property
  def link_index() -> int: ...

# In class AMQP:
@property
def on_link_ready_to_send() -> Callable[[AMQPLinkReadyToSendEventParams], None]: ...
@on_link_ready_to_send.setter
def on_link_ready_to_send(event_hook: Callable[[AMQPLinkReadyToSendEventParams], None]) -> None: ...

Remarks

This event fires when a sender link is ready to send messages.

LinkName is the name of the sender link.

LinkIndex is the index of the sender link in the Link* properties.

on_log Event

Fires once for each log message.

Syntax

class AMQPLogEventParams(object):
  @property
  def log_level() -> int: ...

  @property
  def message() -> str: ...

  @property
  def log_type() -> str: ...

# In class AMQP:
@property
def on_log() -> Callable[[AMQPLogEventParams], None]: ...
@on_log.setter
def on_log(event_hook: Callable[[AMQPLogEventParams], None]) -> None: ...

Remarks

This event fires once for each log message generated by the class. The verbosity is controlled by the LogLevel setting.

LogLevel indicates the level of the Message. Possible values are:

0 (None) No events are logged.
1 (Info - default) Informational events are logged.
2 (Verbose) Detailed data is logged.
3 (Debug) Debug data is logged.

LogType identifies the type of log entry. Possible values are:

  • Info: General information about the class.
  • Session: Session status messages.
  • Frame: Frame status messages.

on_message_in Event

Fires when the class receives a message.

Syntax

class AMQPMessageInEventParams(object):
  @property
  def session_name() -> str: ...

  @property
  def session_index() -> int: ...

  @property
  def link_name() -> str: ...

  @property
  def link_index() -> int: ...

  @property
  def message_id() -> str: ...

  @property
  def state() -> int: ...
  @state.setter
  def state(value) -> None: ...

# In class AMQP:
@property
def on_message_in() -> Callable[[AMQPMessageInEventParams], None]: ...
@on_message_in.setter
def on_message_in(event_hook: Callable[[AMQPMessageInEventParams], None]) -> None: ...

Remarks

This event fires whenever the class receives a message. The message itself is automatically stored in the ReceivedMessage* properties.

Specifying a Delivery Outcome

The State parameter can be set to one of the following values to specify what delivery outcome the class should report to the sender (the default is Accepted (0)):
  • 0: Accepted - The message has been processed successfully.
  • 1: Rejected - The message failed to process successfully. Includes an error describing why.
  • 2: Released - The message has not been (and will not be) processed.
  • 3: Modified - Same as "Released", but with additional metadata for the sender.

When State is set to Rejected (1), the class will include error metadata when it informs the sender of the outcome. Set the RejectErrorCondition and RejectErrorDescription configuration settings before the event handler finishes to specify this error information.

When State is set to Modified (3), the class can include additional metadata when it informs the sender of the outcome. Set zero or more of the ModifiedDeliveryFailed, ModifiedMessageAnnotations, and ModifiedUndeliverableHere configuration settings before the event handler finishes to specify this additional metadata.

Other Parameters

SessionName is the name of the session the message was transmitted on.

SessionIndex is the index of the session in the Session* properties.

LinkName is the name of the link the message was transmitted on.

LinkIndex is the index of the link in the Link* properties.

MessageId is the Id of the message; it may be empty if a message Id was not set.

on_message_out Event

Fires when the class sends a message.

Syntax

class AMQPMessageOutEventParams(object):
  @property
  def session_name() -> str: ...

  @property
  def session_index() -> int: ...

  @property
  def link_name() -> str: ...

  @property
  def link_index() -> int: ...

  @property
  def message_id() -> str: ...

# In class AMQP:
@property
def on_message_out() -> Callable[[AMQPMessageOutEventParams], None]: ...
@on_message_out.setter
def on_message_out(event_hook: Callable[[AMQPMessageOutEventParams], None]) -> None: ...

Remarks

This event fires whenever the class sends a message.

SessionName is the name of the session the message was transmitted on.

SessionIndex is the index of the session in the Session* properties.

LinkName is the name of the link the message was transmitted on.

LinkIndex is the index of the link in the Link* properties.

MessageId is the Id of the message; it may be empty if a message Id was not set.

on_message_outcome Event

Fires when a message's outcome is available.

Syntax

class AMQPMessageOutcomeEventParams(object):
  @property
  def session_name() -> str: ...

  @property
  def session_index() -> int: ...

  @property
  def link_name() -> str: ...

  @property
  def link_index() -> int: ...

  @property
  def message_id() -> str: ...

  @property
  def direction() -> int: ...

  @property
  def state() -> int: ...

# In class AMQP:
@property
def on_message_outcome() -> Callable[[AMQPMessageOutcomeEventParams], None]: ...
@on_message_outcome.setter
def on_message_outcome(event_hook: Callable[[AMQPMessageOutcomeEventParams], None]) -> None: ...

Remarks

This event fires whenever the outcome for a message (incoming or outgoing) is available.

SessionName is the name of the session the message was transmitted on.

SessionIndex is the index of the session in the Session* properties.

LinkName is the name of the link the message was transmitted on.

LinkIndex is the index of the link in the Link* properties.

MessageId is the Id of the message; it may be empty if a message Id was not set.

Direction indicates whether this outcome was sent (0) or received (1).

State indicates the actual message outcome. Possible values are:

  • 0: Accepted - The message has been processed successfully.
  • 1: Rejected - The message failed to process successfully. Includes an error describing why.
  • 2: Released - The message has not been (and will not be) processed.
  • 3: Modified - Same as "Released", but with additional metadata for the sender.

When State is Rejected (1), the RejectErrorCondition and RejectErrorDescription configuration settings can be queried before the event handler finishes to retrieve the error information.

When State is Modified (3), the ModifiedDeliveryFailed, ModifiedMessageAnnotations, and ModifiedUndeliverableHere configuration settings can be queried before the event handler finishes to retrieve the additional metadata.

on_ssl_server_authentication Event

Fired after the server presents its certificate to the client.

Syntax

class AMQPSSLServerAuthenticationEventParams(object):
  @property
  def cert_encoded() -> bytes: ...

  @property
  def cert_subject() -> str: ...

  @property
  def cert_issuer() -> str: ...

  @property
  def status() -> str: ...

  @property
  def accept() -> bool: ...
  @accept.setter
  def accept(value) -> None: ...

# In class AMQP:
@property
def on_ssl_server_authentication() -> Callable[[AMQPSSLServerAuthenticationEventParams], None]: ...
@on_ssl_server_authentication.setter
def on_ssl_server_authentication(event_hook: Callable[[AMQPSSLServerAuthenticationEventParams], None]) -> None: ...

Remarks

This event is where the client can decide whether to continue with the connection process or not. The Accept parameter is a recommendation on whether to continue or close the connection. This is just a suggestion: application software must use its own logic to determine whether to continue or not.

When Accept is False, Status shows why the verification failed (otherwise, Status contains the string "OK"). If it is decided to continue, you can override and accept the certificate by setting the Accept parameter to True.

on_ssl_status Event

Shows the progress of the secure connection.

Syntax

class AMQPSSLStatusEventParams(object):
  @property
  def message() -> str: ...

# In class AMQP:
@property
def on_ssl_status() -> Callable[[AMQPSSLStatusEventParams], None]: ...
@on_ssl_status.setter
def on_ssl_status(event_hook: Callable[[AMQPSSLStatusEventParams], None]) -> None: ...

Remarks

The event is fired for informational and logging purposes only. Used to track the progress of the connection.

AMQP Config Settings

The class accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the config method.

AMQP Config Settings

AuthorizationIdentity:   The value to use as the authorization identity when SASL authentication is used.

When auth_scheme is set to smSASLPlain you may use this setting to specify an authorization identity to be used when authenticating.

DefaultCredit:   The amount of credit to create new receiver links with.

This setting controls the amount of credit that new receiver links are created with.

The default is 1024.

DefaultCreditThreshold:   The credit threshold to create new receiver links with.

The setting controls the credit threshold that new receiver links are created with. When a link's credit reaches the credit threshold, the class will automatically set it back to the amount of credit the link initially had.

The default is 256.

DefaultIncomingWindow:   The incoming window size to create new sessions with.

This setting controls the incoming window size (in frames) that new sessions are created with.

The default is 2014.

DefaultOutgoingWindow:   The outgoing window size to create new sessions with.

This setting controls the outgoing window size (in frames) that new sessions are created with.

The default is 2014.

DefaultSenderSettleMode:   The sender settle mode to create new links with.

This setting controls the sender settle mode that new links (both sender and receiver) are created with. Possible values are:

  • 0 (Unsettled): The sender will send messages to the receiver in an unsettled state.
  • 1 (Settled): The sender will send messages to the receiver in a settled state.
  • 2 (Mixed - default): The sender may send messages to the receiver in either a settled or an unsettled state.
GenerateMessageId:   Whether a unique message Id should be automatically generated when sending a message.

This setting controls whether the class will automatically generate a message_id value (overwriting any existing value in the process) when send_message is called.

The default is False.

LogLevel:   The level of detail that is logged.

This setting controls the level of detail that is logged through the on_log event. Possible values are:

0 (None) No events are logged.
1 (Info - default) Informational events are logged.
2 (Verbose) Detailed data is logged.
3 (Debug) Debug data is logged.

MaxFrameSize:   The maximum frame size.

This setting controls the maximum frame size (in bytes) that the class will accept. This setting cannot be changed while connected.

The default is 4294967295 (0xFFFFFFFF), which is the maximum value allowed.

MaxLinkCountPerSession:   The maximum number of links to restrict new sessions to.

This setting controls the maximum number of links which newly created sessions will be restricted to.

The default is 4294967295 (0xFFFFFFFF), which is the maximum value allowed.

MaxMessageSize:   The maximum message size to restrict new links to.

This setting controls the maximum message size (in bytes) which newly created links will be restricted to.

The default value is 1073741824 (0x40000000).

MaxSessionCount:   The maximum number of sessions.

This setting controls the maximum number of sessions which can be opened.

The default is 65535 (0xFFFF).

ModifiedDeliveryFailed:   Whether the sender should treat this transfer as an unsuccessful delivery attempt.

This setting specifies whether the sender should increment the "delivery count" value of the message that the associated "Modified" delivery outcome applies to (thus treating the transfer as an unsuccessful delivery attempt).

This setting is only valid while inside one of the on_message_in or on_message_outcome event handlers, and can only be set while inside the on_message_in event handler.

ModifiedMessageAnnotations:   The message annotations that the sender should merge into those already on the message.

This setting specifies a set of message annotations that the sender should merge into the existing ones for the message that the associated "Modified" delivery outcome applies to.

If not empty, this setting's value must be specified as valid composite data JSON containing a single AMQP map. The JSON must be structured according to the composite data JSON schema detailed in the send_message method's documentation. For example:

{
  "type": "map",
  "value": [
    { "type": "symbol", "value": "key1" },
    { "type": "string", "value": "test" },
    { "type": "symbol", "value": "key2" },
    { "type": "int", "value": 100 }
  ]
}

This setting is only valid while inside one of the on_message_in or on_message_outcome event handlers, and can only be set while inside the on_message_in event handler.

ModifiedUndeliverableHere:   Whether the receiver has indicated that the sender should not attempt to redeliver the message.

This setting specifies whether the receiver has indicated that the sender should not attempt to redeliver the message that the associated "Modified" delivery outcome applies to. (Note that the sender is free to try and deliver the message to another receiver if it so chooses.)

This setting is only valid while inside one of the on_message_in or on_message_outcome event handlers, and can only be set while inside the on_message_in event handler.

ProtocolVersion:   The AMQP protocol version to conform to.

This setting can be queried to determine what AMQP protocol version the class conforms to.

Note: Currently this setting will always return "1.0", and cannot be changed. The AMQPClassic class may be used instead of this one if AMQP 0.9.1 support is needed.

RejectErrorCondition:   The error condition included with a 'Rejected' delivery outcome.

This setting specifies the error condition included with a "Rejected" delivery outcome. Possible values are:

amqp:internal-error An internal error occurred.
amqp:not-found A peer attempted to work with a remote entity that does not exists.
amqp:unauthorized-access A peer attempted to work with a remote entity it does not have access to.
amqp:decode-error Data could not be decoded.
amqp:resource-limited-exceeded A peer exceeded its resource allocation.
amqp:not-allowed A peer tried to use a frame in a manner inconsistent with the AMQP specification.
amqp:invalid-field An invalid field was supplied in a frame body.
amqp:not-implemented A peer tried to use functionality that its partner does not implement.
amqp:resource-locked A peer tried to access a resource which is currently in use.
amqp:precondition-failed A peer made a request that was denied because a precondition failed.
amqp:resource-deleted A peer tried to work with a deleted resource.
amqp:illegal-state A peer sent a frame that is not permitted given the current state.
amqp:frame-size-too-small A peer attempted to send a frame larger than the negotiated maximum frame size.

This setting is only valid while inside one of the on_message_in or on_message_outcome event handlers, and can only be set while inside the on_message_in event handler.

RejectErrorDescription:   The error description included with a 'Rejected' delivery outcome.

This setting specifies a description of the error included with a "Rejected" delivery outcome. It may be empty.

This setting is only valid while inside one of the on_message_in or on_message_outcome event handlers, and can only be set while inside the on_message_in event handler.

SenderSettleMode[LinkName]:   Retrieves the negotiated sender settle mode for the specified link.

This setting can be queried to obtain the negotiated sender settle mode for an existing link specified by "LinkName".

SimplifiedJSONFormat:   Whether to output simplified JSON where possible.

This setting controls whether the class should output JSON using the abbreviated value syntax where possible. Refer to the composite data JSON schema detail in the documentation of the send_message method for more information.

The default is true.

TCPClient Config Settings

ConnectionTimeout:   Sets a separate timeout value for establishing a connection.

When set, this configuration setting allows you to specify a different timeout value for establishing a connection. Otherwise, the class will use timeout for establishing a connection and transmitting/receiving data.

FirewallAutoDetect:   Tells the class whether or not to automatically detect and use firewall system settings, if available.

This configuration setting is provided for use by classs that do not directly expose Firewall properties.

FirewallHost:   Name or IP address of firewall (optional).

If a FirewallHost is given, requested connections will be authenticated through the specified firewall when connecting.

If the FirewallHost setting is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, the FirewallHost setting is set to the corresponding address. If the search is not successful, an error is returned.

Note: This setting is provided for use by classs that do not directly expose Firewall properties.

FirewallPassword:   Password to be used if authentication is to be used when connecting through the firewall.

If FirewallHost is specified, the FirewallUser and FirewallPassword settings are used to connect and authenticate to the given firewall. If the authentication fails, the class fails with an error.

Note: This setting is provided for use by classs that do not directly expose Firewall properties.

FirewallPort:   The TCP port for the FirewallHost;.

The FirewallPort is set automatically when FirewallType is set to a valid value.

Note: This configuration setting is provided for use by classs that do not directly expose Firewall properties.

FirewallType:   Determines the type of firewall to connect through.

The appropriate values are as follows:

0No firewall (default setting).
1Connect through a tunneling proxy. FirewallPort is set to 80.
2Connect through a SOCKS4 Proxy. FirewallPort is set to 1080.
3Connect through a SOCKS5 Proxy. FirewallPort is set to 1080.
10Connect through a SOCKS4A Proxy. FirewallPort is set to 1080.

Note: This setting is provided for use by classs that do not directly expose Firewall properties.

FirewallUser:   A user name if authentication is to be used connecting through a firewall.

If the FirewallHost is specified, the FirewallUser and FirewallPassword settings are used to connect and authenticate to the Firewall. If the authentication fails, the class fails with an error.

Note: This setting is provided for use by classs that do not directly expose Firewall properties.

KeepAliveInterval:   The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received.

When set, TCPKeepAlive will automatically be set to True. A TCP keep-alive packet will be sent after a period of inactivity as defined by KeepAliveTime. If no acknowledgment is received from the remote host, the keep-alive packet will be sent again. This configuration setting specifies the interval at which the successive keep-alive packets are sent in milliseconds. This system default if this value is not specified here is 1 second.

Note: This value is not applicable in macOS.

KeepAliveTime:   The inactivity time in milliseconds before a TCP keep-alive packet is sent.

When set, TCPKeepAlive will automatically be set to True. By default, the operating system will determine the time a connection is idle before a Transmission Control Protocol (TCP) keep-alive packet is sent. This system default if this value is not specified here is 2 hours. In many cases, a shorter interval is more useful. Set this value to the desired interval in milliseconds.

Linger:   When set to True, connections are terminated gracefully.

This property controls how a connection is closed. The default is True.

In the case that Linger is True (default), two scenarios determine how long the connection will linger. In the first, if LingerTime is 0 (default), the system will attempt to send pending data for a connection until the default IP timeout expires.

In the second scenario, if LingerTime is a positive value, the system will attempt to send pending data until the specified LingerTime is reached. If this attempt fails, then the system will reset the connection.

The default behavior (which is also the default mode for stream sockets) might result in a long delay in closing the connection. Although the class returns control immediately, the system could hold system resources until all pending data are sent (even after your application closes).

Setting this property to False forces an immediate disconnection. If you know that the other side has received all the data you sent (e.g., by a client acknowledgment), setting this property to False might be the appropriate course of action.

LingerTime:   Time in seconds to have the connection linger.

LingerTime is the time, in seconds, the socket connection will linger. This value is 0 by default, which means it will use the default IP timeout.

LocalHost:   The name of the local host through which connections are initiated or accepted.

The local_host setting contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface.

If the class is connected, the local_host setting shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

LocalPort:   The port in the local host where the class binds.

This must be set before a connection is attempted. It instructs the class to bind to a specific port (or communication endpoint) in the local machine.

Setting this to 0 (default) enables the system to choose a port at random. The chosen port will be shown by local_port after the connection is established.

local_port cannot be changed once a connection is made. Any attempt to set this when a connection is active will generate an error.

This; setting is useful when trying to connect to services that require a trusted port in the client side. An example is the remote shell (rsh) service in UNIX systems.

MaxLineLength:   The maximum amount of data to accumulate when no EOL is found.

MaxLineLength is the size of an internal buffer, which holds received data while waiting for an eol string.

If an eol string is found in the input stream before MaxLineLength bytes are received, the on_data_in event is fired with the EOL parameter set to True, and the buffer is reset.

If no eol is found, and MaxLineLength bytes are accumulated in the buffer, the on_data_in event is fired with the EOL parameter set to False, and the buffer is reset.

The minimum value for MaxLineLength is 256 bytes. The default value is 2048 bytes.

MaxTransferRate:   The transfer rate limit in bytes per second.

This configuration setting can be used to throttle outbound TCP traffic. Set this to the number of bytes to be sent per second. By default, this is not set and there is no limit.

ProxyExceptionsList:   A semicolon separated list of hosts and IPs to bypass when using a proxy.

This configuration setting optionally specifies a semicolon-separated list of hostnames or IP addresses to bypass when a proxy is in use. When requests are made to hosts specified in this property, the proxy will not be used. For instance:

www.google.com;www.nsoftware.com

TCPKeepAlive:   Determines whether or not the keep alive socket option is enabled.

If set to True, the socket's keep-alive option is enabled and keep-alive packets will be sent periodically to maintain the connection. Set KeepAliveTime and KeepAliveInterval to configure the timing of the keep-alive packets.

Note: This value is not applicable in Java.

TcpNoDelay:   Whether or not to delay when sending packets.

When true, the socket will send all data that is ready to send at once. When false, the socket will send smaller buffered packets of data at small intervals. This is known as the Nagle algorithm.

By default, this config is set to false.

UseIPv6:   Whether to use IPv6.

When set to 0 (default), the class will use IPv4 exclusively. When set to 1, the class will use IPv6 exclusively. To instruct the class to prefer IPv6 addresses, but use IPv4 if IPv6 is not supported on the system, this setting should be set to 2. The default value is 0. Possible values are:

0 IPv4 Only
1 IPv6 Only
2 IPv6 with IPv4 fallback

SSL Config Settings

LogSSLPackets:   Controls whether SSL packets are logged when using the internal security API.

When ssl_provider is set to Internal, this setting controls whether SSL packets should be logged. By default, this setting is False, as it is only useful for debugging purposes.

When enabled, SSL packet logs are output using the on_ssl_status event, which will fire each time an SSL packet is sent or received.

Enabling this setting has no effect if ssl_provider is set to Platform.

OpenSSLCADir:   The path to a directory containing CA certificates.

This functionality is available only when the provider is OpenSSL.

The path set by this property should point to a directory containing CA certificates in PEM format. The files each contain one CA certificate. The files are looked up by the CA subject name hash value, which must hence be available. If more than one CA certificate with the same name hash value exist, the extension must be different (e.g. 9d66eef0.0, 9d66eef0.1 etc). OpenSSL recommends to use the c_rehash utility to create the necessary links. Please refer to the OpenSSL man page SSL_CTX_load_verify_locations(3) for details.

OpenSSLCAFile:   Name of the file containing the list of CA's trusted by your application.

This functionality is available only when the provider is OpenSSL.

The file set by this property should contain a list of CA certificates in PEM format. The file can contain several CA certificates identified by

-----BEGIN CERTIFICATE-----

... (CA certificate in base64 encoding) ...

-----END CERTIFICATE-----

sequences. Before, between, and after the certificates text is allowed which can be used e.g. for descriptions of the certificates. Please refer to the OpenSSL man page SSL_CTX_load_verify_locations(3) for details.

OpenSSLCipherList:   A string that controls the ciphers to be used by SSL.

This functionality is available only when the provider is OpenSSL.

The format of this string is described in the OpenSSL man page ciphers(1) section "CIPHER LIST FORMAT". Please refer to it for details. The default string "DEFAULT" is determined at compile time and is normally equivalent to "ALL:!ADH:RC4+RSA:+SSLv2:@STRENGTH".

OpenSSLPrngSeedData:   The data to seed the pseudo random number generator (PRNG).

This functionality is available only when the provider is OpenSSL.

By default OpenSSL uses the device file "/dev/urandom" to seed the PRNG and setting OpenSSLPrngSeedData is not required. If set, the string specified is used to seed the PRNG.

ReuseSSLSession:   Determines if the SSL session is reused.

If set to true, the class will reuse the context if and only if the following criteria are met:

  • The target host name is the same.
  • The system cache entry has not expired (default timeout is 10 hours).
  • The application process that calls the function is the same.
  • The logon session is the same.
  • The instance of the class is the same.

SSLCACertFilePaths:   The paths to CA certificate files on Unix/Linux.

This setting specifies the paths on disk to CA certificate files on Unix/Linux.

The value is formatted as a list of paths separated by semicolons. The class will check for the existence of each file in the order specified. When a file is found the CA certificates within the file will be loaded and used to determine the validity of server or client certificates.

The default value is:

/etc/ssl/ca-bundle.pem;/etc/pki/tls/certs/ca-bundle.crt;/etc/ssl/certs/ca-certificates.crt;/etc/pki/tls/cacert.pem

SSLCACerts:   A newline separated list of CA certificate to use during SSL client authentication.

This setting specifies one or more CA certificates to be included in the request when performing SSL client authentication. Some servers require the entire chain, including CA certificates, to be presented when performing SSL client authentication. The value of this setting is a newline (CrLf) separated list of certificates. For instance:

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

SSLCheckCRL:   Whether to check the Certificate Revocation List for the server certificate.

This setting specifies whether the class will check the Certificate Revocation List specified by the server certificate. If set to 1 or 2, the class will first obtain the list of CRL URLs from the server certificate's CRL distribution points extension. The class will then make HTTP requests to each CRL endpoint to check the validity of the server's certificate. If the certificate has been revoked or any other issues are found during validation the class fails with an error.

When set to 0 (default) the CRL check will not be performed by the class. When set to 1, it will attempt to perform the CRL check, but will continue without an error if the server's certificate does not support CRL. When set to 2, it will perform the CRL check and will throw an error if CRL is not supported.

This configuration setting is only supported in the Java, C#, and C++ editions. In the C++ edition, it is only supported on Windows operating systems.

SSLCipherStrength:   The minimum cipher strength used for bulk encryption.

This minimum cipher strength largely dependent on the security modules installed on the system. If the cipher strength specified is not supported, an error will be returned when connections are initiated.

Please note that this setting contains the minimum cipher strength requested from the security library. The actual cipher strength used for the connection is shown by the on_ssl_status event.

Use this setting with caution. Requesting a lower cipher strength than necessary could potentially cause serious security vulnerabilities in your application.

When the provider is OpenSSL, SSLCipherStrength is currently not supported. This functionality is instead made available through the OpenSSLCipherList config setting.

SSLEnabledCipherSuites:   The cipher suite to be used in an SSL negotiation.

The enabled cipher suites to be used in SSL negotiation.

By default, the enabled cipher suites will include all available ciphers ("*").

The special value "*" means that the class will pick all of the supported cipher suites. If SSLEnabledCipherSuites is set to any other value, only the specified cipher suites will be considered.

Multiple cipher suites are separated by semicolons.

Example values when ssl_provider is set to Platform: obj.config("SSLEnabledCipherSuites=*"); obj.config("SSLEnabledCipherSuites=CALG_AES_256"); obj.config("SSLEnabledCipherSuites=CALG_AES_256;CALG_3DES"); Possible values when ssl_provider is set to Platform include:

  • CALG_3DES
  • CALG_3DES_112
  • CALG_AES
  • CALG_AES_128
  • CALG_AES_192
  • CALG_AES_256
  • CALG_AGREEDKEY_ANY
  • CALG_CYLINK_MEK
  • CALG_DES
  • CALG_DESX
  • CALG_DH_EPHEM
  • CALG_DH_SF
  • CALG_DSS_SIGN
  • CALG_ECDH
  • CALG_ECDH_EPHEM
  • CALG_ECDSA
  • CALG_ECMQV
  • CALG_HASH_REPLACE_OWF
  • CALG_HUGHES_MD5
  • CALG_HMAC
  • CALG_KEA_KEYX
  • CALG_MAC
  • CALG_MD2
  • CALG_MD4
  • CALG_MD5
  • CALG_NO_SIGN
  • CALG_OID_INFO_CNG_ONLY
  • CALG_OID_INFO_PARAMETERS
  • CALG_PCT1_MASTER
  • CALG_RC2
  • CALG_RC4
  • CALG_RC5
  • CALG_RSA_KEYX
  • CALG_RSA_SIGN
  • CALG_SCHANNEL_ENC_KEY
  • CALG_SCHANNEL_MAC_KEY
  • CALG_SCHANNEL_MASTER_HASH
  • CALG_SEAL
  • CALG_SHA
  • CALG_SHA1
  • CALG_SHA_256
  • CALG_SHA_384
  • CALG_SHA_512
  • CALG_SKIPJACK
  • CALG_SSL2_MASTER
  • CALG_SSL3_MASTER
  • CALG_SSL3_SHAMD5
  • CALG_TEK
  • CALG_TLS1_MASTER
  • CALG_TLS1PRF
Example values when ssl_provider is set to Internal: obj.config("SSLEnabledCipherSuites=*"); obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA"); obj.config("SSLEnabledCipherSuites=TLS_DHE_DSS_WITH_AES_128_CBC_SHA;TLS_DH_ANON_WITH_AES_128_CBC_SHA"); Possible values when ssl_provider is set to Internal include:
  • TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  • TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  • TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
  • TLS_RSA_WITH_AES_256_GCM_SHA384
  • TLS_RSA_WITH_AES_128_GCM_SHA256
  • TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
  • TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
  • TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
  • TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
  • TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
  • TLS_DH_RSA_WITH_AES_128_GCM_SHA256 (Not Recommended)
  • TLS_DH_RSA_WITH_AES_256_GCM_SHA384 (Not Recommended)
  • TLS_DH_DSS_WITH_AES_128_GCM_SHA256 (Not Recommended)
  • TLS_DH_DSS_WITH_AES_256_GCM_SHA384 (Not Recommended)
  • TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  • TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
  • TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
  • TLS_RSA_WITH_AES_256_CBC_SHA256
  • TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  • TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
  • TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
  • TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  • TLS_RSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
  • TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
  • TLS_RSA_WITH_AES_256_CBC_SHA
  • TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  • TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  • TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
  • TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  • TLS_ECDH_RSA_WITH_AES_256_CBC_SHA
  • TLS_DHE_DSS_WITH_AES_256_CBC_SHA
  • TLS_RSA_WITH_AES_128_CBC_SHA
  • TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  • TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  • TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
  • TLS_ECDH_RSA_WITH_AES_128_CBC_SHA
  • TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  • TLS_DHE_DSS_WITH_AES_128_CBC_SHA
  • TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
  • TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
  • TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
  • TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA
  • TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
  • TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
  • TLS_RSA_WITH_3DES_EDE_CBC_SHA
  • TLS_RSA_WITH_DES_CBC_SHA
  • TLS_DHE_RSA_WITH_DES_CBC_SHA
  • TLS_DHE_DSS_WITH_DES_CBC_SHA
  • TLS_RSA_WITH_RC4_128_MD5
  • TLS_RSA_WITH_RC4_128_SHA

When TLS 1.3 is negotiated (see SSLEnabledProtocols) only the following cipher suites are supported:

  • TLS_AES_256_GCM_SHA384
  • TLS_CHACHA20_POLY1305_SHA256
  • TLS_AES_128_GCM_SHA256

SSLEnabledCipherSuites is used together with SSLCipherStrength.

SSLEnabledProtocols:   Used to enable/disable the supported security protocols.

Used to enable/disable the supported security protocols.

Not all supported protocols are enabled by default (the value of this setting is 4032). If you want more granular control over the enabled protocols, you can set this property to the binary 'OR' of one or more of the following values:

TLS1.312288 (Hex 3000)
TLS1.23072 (Hex C00) (Default)
TLS1.1768 (Hex 300) (Default)
TLS1 192 (Hex C0) (Default)
SSL3 48 (Hex 30)
SSL2 12 (Hex 0C)

SSLEnabledProtocols - TLS 1.3 Notes

By default when TLS 1.3 is enabled the class will use the internal TLS implementation.

In editions which are designed to run on Windows ssl_provider can be set to Platform to use the platform implementation instead of the internal implementation. When configured in this manner, please note that the platform provider is only supported on Windows 11 / Windows Server 2022 and up. The default internal provider is available on all platforms and is not restricted to any specific OS version.

If set to 1 (Platform provider) please be aware of the following notes:

  • The platform provider is only available on Windows 11 / Windows Server 2022 and up.
  • SSLEnabledCipherSuites and other similar SSL configuration settings are not supported.
  • If SSLEnabledProtocols includes both TLS 1.3 and TLS 1.2 the above restrictions are still applicable even if TLS 1.2 is negotiated. Enabling TLS 1.3 with the platform provider changes the implementation used for all TLS versions.

SSLEnableRenegotiation:   Whether the renegotiation_info SSL extension is supported.

This setting specifies whether the renegotiation_info SSL extension will be used in the request when using the internal security API. This setting is True by default, but can be set to False to disable the extension.

This setting is only applicable when ssl_provider is set to Internal.

SSLIncludeCertChain:   Whether the entire certificate chain is included in the SSLServerAuthentication event.

This setting specifies whether the Encoded parameter of the on_ssl_server_authentication event contains the full certificate chain. By default this value is False and only the leaf certificate will be present in the Encoded parameter of the on_ssl_server_authentication event.

If set to True all certificates returned by the server will be present in the Encoded parameter of the on_ssl_server_authentication event. This includes the leaf certificate, any intermediate certificate, and the root certificate.

SSLKeyLogFile:   The location of a file where per-session secrets are written for debugging purposes.

This setting optionally specifies the full path to a file on disk where per-session secrets are stored for debugging purposes.

When set, the class will save the session secrets in the same format as the SSLKEYLOGFILE environment variable functionality used by most major browsers and tools such as Chrome, Firefox, and cURL. This file can then be used in tools such as Wireshark to decrypt TLS traffice for debugging purposes. When writing to this file the class will only append, it will not overwrite previous values.

Note: This setting is only applicable when ssl_provider is set to Internal.

SSLNegotiatedCipher:   Returns the negotiated ciphersuite.

Returns the ciphersuite negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedCipher[connId]");

SSLNegotiatedCipherStrength:   Returns the negotiated ciphersuite strength.

Returns the strength of the ciphersuite negotiated during the SSL handshake.

Note: For server components (e.g.TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedCipherStrength[connId]");

SSLNegotiatedCipherSuite:   Returns the negotiated ciphersuite.

Returns the ciphersuite negotiated during the SSL handshake represented as a single string.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedCipherSuite[connId]");

SSLNegotiatedKeyExchange:   Returns the negotiated key exchange algorithm.

Returns the key exchange algorithm negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedKeyExchange[connId]");

SSLNegotiatedKeyExchangeStrength:   Returns the negotiated key exchange algorithm strength.

Returns the strenghth of the key exchange algorithm negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedKeyExchangeStrength[connId]");

SSLNegotiatedVersion:   Returns the negotiated protocol version.

Returns the protocol version negotiated during the SSL handshake.

Note: For server components (e.g. TCPServer) this is a per-connection setting accessed by passing the ConnectionId. For example: server.Config("SSLNegotiatedVersion[connId]");

SSLSecurityFlags:   Flags that control certificate verification.

The following flags are defined (specified in hexadecimal notation). They can be or-ed together to exclude multiple conditions:

0x00000001Ignore time validity status of certificate.
0x00000002Ignore time validity status of CTL.
0x00000004Ignore non-nested certificate times.
0x00000010Allow unknown Certificate Authority.
0x00000020Ignore wrong certificate usage.
0x00000100Ignore unknown certificate revocation status.
0x00000200Ignore unknown CTL signer revocation status.
0x00000400Ignore unknown Certificate Authority revocation status.
0x00000800Ignore unknown Root revocation status.
0x00008000Allow test Root certificate.
0x00004000Trust test Root certificate.
0x80000000Ignore non-matching CN (certificate CN not-matching server name).

This functionality is currently not available when the provider is OpenSSL.

SSLServerCACerts:   A newline separated list of CA certificate to use during SSL server certificate validation.

This setting optionally specifies one or more CA certificates to be used when verifying the server certificate. When verifying the server's certificate the certificates trusted by the system will be used as part of the verification process. If the server's CA certificates are not installed to the trusted system store, they may be specified here so they are included when performing the verification process. This setting should only be set if the server's CA certificates are not already trusted on the system and cannot be installed to the trusted system store.

The value of this setting is a newline (CrLf) separated list of certificates. For instance:

-----BEGIN CERTIFICATE-----
MIIEKzCCAxOgAwIBAgIRANTET4LIkxdH6P+CFIiHvTowDQYJKoZIhvcNAQELBQAw
...
eWHV5OW1K53o/atv59sOiW5K3crjFhsBOd5Q+cJJnU+SWinPKtANXMht+EDvYY2w
F0I1XhM+pKj7FjDr+XNj
-----END CERTIFICATE-----
\r \n
-----BEGIN CERTIFICATE-----
MIIEFjCCAv6gAwIBAgIQetu1SMxpnENAnnOz1P+PtTANBgkqhkiG9w0BAQUFADBp
..
d8q23djXZbVYiIfE9ebr4g3152BlVCHZ2GyPdjhIuLeH21VbT/dyEHHA
-----END CERTIFICATE-----

TLS12SignatureAlgorithms:   Defines the allowed TLS 1.2 signature algorithms when SSLProvider is set to Internal.

This setting specifies the allowed server certificate signature algorithms when ssl_provider is set to Internal and SSLEnabledProtocols is set to allow TLS 1.2.

When specified the class will verify that the server certificate signature algorithm is among the values specified in this setting. If the server certificate signature algorithm is unsupported the class fails with an error.

The format of this value is a comma separated list of hash-signature combinations. For instance: TCPClient.SSLProvider = TCPClientSSLProviders.sslpInternal; TCPClient.Config("SSLEnabledProtocols=3072"); //TLS 1.2 TCPClient.Config("TLS12SignatureAlgorithms=sha256-rsa,sha256-dsa,sha1-rsa,sha1-dsa"); The default value for this setting is sha512-ecdsa,sha512-rsa,sha512-dsa,sha384-ecdsa,sha384-rsa,sha384-dsa,sha256-ecdsa,sha256-rsa,sha256-dsa,sha224-ecdsa,sha224-rsa,sha224-dsa,sha1-ecdsa,sha1-rsa,sha1-dsa.

In order to not restrict the server's certificate signature algorithm, specify an empty string as the value for this setting, which will cause the signature_algorithms TLS 1.2 extension to not be sent.

TLS12SupportedGroups:   The supported groups for ECC.

This setting specifies a comma separated list of named groups used in TLS 1.2 for ECC.

The default value is ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1.

When using TLS 1.2 and ssl_provider is set to Internal, the values refer to the supported groups for ECC. The following values are supported:

  • "ecdhe_secp256r1" (default)
  • "ecdhe_secp384r1" (default)
  • "ecdhe_secp521r1" (default)

TLS13KeyShareGroups:   The groups for which to pregenerate key shares.

This setting specifies a comma separated list of named groups used in TLS 1.3 for key exchange. The groups specified here will have key share data pregenerated locally before establishing a connection. This can prevent an additional round trip during the handshake if the group is supported by the server.

The default value is set to balance common supported groups and the computational resources required to generate key shares. As a result only some groups are included by default in this setting.

Note: All supported groups can always be used during the handshake even if not listed here, but if a group is used which is not present in this list it will incur an additional round trip and time to generate the key share for that group.

In most cases this setting does not need to be modified. This should only be modified if there is a specific reason to do so.

The default value is ecdhe_x25519,ecdhe_secp256r1,ecdhe_secp384r1,ffdhe_2048,ffdhe_3072

The values are ordered from most preferred to least preferred. The following values are supported:

  • "ecdhe_x25519" (default)
  • "ecdhe_x448"
  • "ecdhe_secp256r1" (default)
  • "ecdhe_secp384r1" (default)
  • "ecdhe_secp521r1"
  • "ffdhe_2048" (default)
  • "ffdhe_3072" (default)
  • "ffdhe_4096"
  • "ffdhe_6144"
  • "ffdhe_8192"

TLS13SignatureAlgorithms:   The allowed certificate signature algorithms.

This setting holds a comma separated list of allowed signature algorithms. Possible values are:

  • "ed25519" (default)
  • "ed448" (default)
  • "ecdsa_secp256r1_sha256" (default)
  • "ecdsa_secp384r1_sha384" (default)
  • "ecdsa_secp521r1_sha512" (default)
  • "rsa_pkcs1_sha256" (default)
  • "rsa_pkcs1_sha384" (default)
  • "rsa_pkcs1_sha512" (default)
  • "rsa_pss_sha256" (default)
  • "rsa_pss_sha384" (default)
  • "rsa_pss_sha512" (default)
The default value is rsa_pss_sha256,rsa_pss_sha384,rsa_pss_sha512,rsa_pkcs1_sha256,rsa_pkcs1_sha384,rsa_pkcs1_sha512,ecdsa_secp256r1_sha256,ecdsa_secp384r1_sha384,ecdsa_secp521r1_sha512,ed25519,ed448. This setting is only applicable when SSLEnabledProtocols includes TLS 1.3.
TLS13SupportedGroups:   The supported groups for (EC)DHE key exchange.

This setting specifies a comma separated list of named groups used in TLS 1.3 for key exchange. This setting should only be modified if there is a specific reason to do so.

The default value is ecdhe_x25519,ecdhe_x448,ecdhe_secp256r1,ecdhe_secp384r1,ecdhe_secp521r1,ffdhe_2048,ffdhe_3072,ffdhe_4096,ffdhe_6144,ffdhe_8192

The values are ordered from most preferred to least preferred. The following values are supported:

  • "ecdhe_x25519" (default)
  • "ecdhe_x448" (default)
  • "ecdhe_secp256r1" (default)
  • "ecdhe_secp384r1" (default)
  • "ecdhe_secp521r1" (default)
  • "ffdhe_2048" (default)
  • "ffdhe_3072" (default)
  • "ffdhe_4096" (default)
  • "ffdhe_6144" (default)
  • "ffdhe_8192" (default)

Socket Config Settings

AbsoluteTimeout:   Determines whether timeouts are inactivity timeouts or absolute timeouts.

If AbsoluteTimeout is set to True, any method which does not complete within Timeout seconds will be aborted. By default, AbsoluteTimeout is False, and the timeout is an inactivity timeout.

Note: This option is not valid for UDP ports.

FirewallData:   Used to send extra data to the firewall.

When the firewall is a tunneling proxy, use this property to send custom (additional) headers to the firewall (e.g. headers for custom authentication schemes).

InBufferSize:   The size in bytes of the incoming queue of the socket.

This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be receiving. Increasing the value of the InBufferSize setting can provide significant improvements in performance in some cases.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the class is activated the InBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small.

OutBufferSize:   The size in bytes of the outgoing queue of the socket.

This is the size of an internal queue in the TCP/IP stack. You can increase or decrease its size depending on the amount of data that you will be sending. Increasing the value of the OutBufferSize setting can provide significant improvements in performance in some cases.

Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the class is activated the OutBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small.

AMQP Errors

AMQP Errors

600   AMQP protocol error. Refer to the error message for more information.
601   Malformed frame.
602   SASL authentication failed.
603   Cannot open another session or link.
604   Invalid data format.
605   Cannot modify message data.
606   Cannot modify configuration setting.

TCPClient Errors

100   You cannot change the remote_port at this time. A connection is in progress.
101   You cannot change the remote_host (Server) at this time. A connection is in progress.
102   The remote_host address is invalid (0.0.0.0).
104   Already connected. If you want to reconnect, close the current connection first.
106   You cannot change the local_port at this time. A connection is in progress.
107   You cannot change the local_host at this time. A connection is in progress.
112   You cannot change MaxLineLength at this time. A connection is in progress.
116   remote_port cannot be zero. Please specify a valid service port number.
117   You cannot change the UseConnection option while the class is active.
135   Operation would block.
201   Timeout.
211   Action impossible in control's present state.
212   Action impossible while not connected.
213   Action impossible while listening.
301   Timeout.
302   Could not open file.
434   Unable to convert string to selected CodePage.
1105   Already connecting. If you want to reconnect, close the current connection first.
1117   You need to connect first.
1119   You cannot change the LocalHost at this time. A connection is in progress.
1120   Connection dropped by remote host.

SSL Errors

270   Cannot load specified security library.
271   Cannot open certificate store.
272   Cannot find specified certificate.
273   Cannot acquire security credentials.
274   Cannot find certificate chain.
275   Cannot verify certificate chain.
276   Error during handshake.
280   Error verifying certificate.
281   Could not find client certificate.
282   Could not find server certificate.
283   Error encrypting data.
284   Error decrypting data.

TCP/IP Errors

10004   [10004] Interrupted system call.
10009   [10009] Bad file number.
10013   [10013] Access denied.
10014   [10014] Bad address.
10022   [10022] Invalid argument.
10024   [10024] Too many open files.
10035   [10035] Operation would block.
10036   [10036] Operation now in progress.
10037   [10037] Operation already in progress.
10038   [10038] Socket operation on non-socket.
10039   [10039] Destination address required.
10040   [10040] Message too long.
10041   [10041] Protocol wrong type for socket.
10042   [10042] Bad protocol option.
10043   [10043] Protocol not supported.
10044   [10044] Socket type not supported.
10045   [10045] Operation not supported on socket.
10046   [10046] Protocol family not supported.
10047   [10047] Address family not supported by protocol family.
10048   [10048] Address already in use.
10049   [10049] Can't assign requested address.
10050   [10050] Network is down.
10051   [10051] Network is unreachable.
10052   [10052] Net dropped connection or reset.
10053   [10053] Software caused connection abort.
10054   [10054] Connection reset by peer.
10055   [10055] No buffer space available.
10056   [10056] Socket is already connected.
10057   [10057] Socket is not connected.
10058   [10058] Can't send after socket shutdown.
10059   [10059] Too many references, can't splice.
10060   [10060] Connection timed out.
10061   [10061] Connection refused.
10062   [10062] Too many levels of symbolic links.
10063   [10063] File name too long.
10064   [10064] Host is down.
10065   [10065] No route to host.
10066   [10066] Directory not empty
10067   [10067] Too many processes.
10068   [10068] Too many users.
10069   [10069] Disc Quota Exceeded.
10070   [10070] Stale NFS file handle.
10071   [10071] Too many levels of remote in path.
10091   [10091] Network subsystem is unavailable.
10092   [10092] WINSOCK DLL Version out of range.
10093   [10093] Winsock not loaded yet.
11001   [11001] Host not found.
11002   [11002] Non-authoritative 'Host not found' (try again or check DNS setup).
11003   [11003] Non-recoverable errors: FORMERR, REFUSED, NOTIMP.
11004   [11004] Valid name, no data record (check DNS setup).

Copyright (c) 2022 /n software inc. - All rights reserved.
IPWorks MQ 2022 Python Edition - Version 22.0 [Build 8369]