outgoingMessageTopicAlias (property)

An integer used to identify the topic instead of the full topic filter in order to reduce the size of the publish packet.

Syntax

- (int)outgoingMessageTopicAlias:(int)outgoingMessageIndex;
public func outgoingMessageTopicAlias(outgoingMessageIndex: Int32) throws -> Int32

Default Value

0

Remarks

An integer used to identify the topic instead of the full topic filter in order to reduce the size of the publish packet.

If a non-zero topic alias is received, the client should establish a new topic alias mapping or use an existing mapping, depending on whether the OutgoingMessageTopic string is empty.

For details on setting topic aliases for outgoing messages, see the TopicAlias configuration setting.

Valid only for MQTT 5.

The OutgoingMessageIndex parameter specifies the index of the item in the array. The size of the array is controlled by the OutgoingMessageCount property.

This property is read-only.

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IPWorks MQ 2020 iOS Edition - Version 20.0 [Build 8162]