The Id of the application that created the message.

This property holds the Id of the application that created the message. It may be empty if the message does not have an application Id set.

This value must be specified as a string no longer than 255 characters.

The message body.

This property holds the body of the message. It may be empty.

The message body.

This property holds the body of the message. It may be empty.

The name of the channel the message is associated with.

This property reflects the name of the channel which the message is associated with; it is populated automatically by the component.

The content encoding of the message's body.

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

This value must be specified as a string no longer than 255 characters.

The content type (MIME type) of the message's body.

This property holds the content type (MIME type) of the message's body. It may be empty if the message does not have a content type set.

This value must be specified as a string no longer than 255 characters.

The correlation Id of the message.

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

This value must be specified as a string no longer than 255 characters.

The delivery mode of the message.

This property holds the delivery mode of the message; possible values are:

• 0: Unspecified.
• 1: Non-persistent; the message may be lost if the server encounters an error.
• 2: Persistent; the message will not be lost, even in case of server errors.

The default is 0, which indicates that the message does not have an explicit delivery mode set.

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.

Headers associated with the message.

This property holds additional Headers associated with the message. It may be empty if the message does not have any headers set.

This property must be specified as a JSON object containing name-type-value tuples; for example:

All "name" values must be ASCII strings that:

• Start with an ASCII letter, $, or $ character.
• Only contain ASCII letters, digits, underscores, $, and $ characters.
• Are unique among their siblings.
• Are no longer than 128 characters.

The following table describes all valid "type" values, and how to format the "value" field for each:

Note: The ulong and sstring value types are not supported when the RabbitMQCompatible configuration setting is enabled.

Headers of the table type should be specified in the same manner as shown above, while headers of the array type should be specified as a JSON array of type-value pairs; for example:

Nesting and mixing multiple levels of arrays and tables is allowed.

The unique Id of the message.

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

This value must be specified as a string no longer than 255 characters.

The priority of the message.

This property holds the priority of the message. Valid priority values are 0-9; any other value causes the message to have unspecified priority when sent.

The address to send replies to for the message.

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

This value must be specified as a string no longer than 255 characters.

The message's timestamp.

This property holds the timestamp of the message, specified as milliseconds since the Unix epoch (January 1, 1970 00:00:00 UTC). It may be less than or equal to 0 (default) if the message does not have a timestamp set.

The message's type.

This property holds the type of the message. It may be empty if the message does not have a type set.

This value must be specified as a string no longer than 255 characters.

The identity of the user responsible for producing the message.

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

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

This value must be specified as a string no longer than 255 characters.