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WSO2 Message Broker (WSO2 MB) uses two transport protocols for the purpose of brokering messages between publishers and subscribers. These protocols are the Advanced Message Queueing Protocol (AMQP) and the Message Queueing and Telemetry Transport (MQTT).

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Code Block

language	xml

<amqp enabled="true">
	<!-- most of the amqp configurations reside in qpid-config.xml since we inherit the qpid messaging model during AMQP.-->
	<sslConnection enabled="true" port="8672">
  	<port>5672</port>
	<sslPort>8672</sslPort>
	<maximumRedeliveryAttempts>10</maximumRedeliveryAttempts>
	  	<keyStore>
        	<location>repository/resources/security/wso2carbon.jks</location>
            <password>wso2carbon</password>
            <certType>SunX509</certType>
    	</keyStore>
        <trustStore>
            <location>repository/resources/security/client-truststore.jks</location>
            <password>wso2carbon</password>
            <certType>SunX509</certType>
        </trustStore>
    </sslConnection>
    <maximumRedeliveryAttempts>10</maximumRedeliveryAttempts>
    <allowSharedTopicSubscriptions>false</allowSharedTopicSubscriptions>
    <allowStrictNameValidation>true</allowStrictNameValidation>
</amqp>

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Message Queueing and Telemetry Transport

The Message Queueing and Telemetry Transport (MQTT) is a lightweight, broker-based publish/subscribe messaging protocol, which enables an extremely lightweight publish/subscribe messaging model. WSO2 MB 3.0.0 and later versions fully support MQTT version 3.1.0, and partially supports version 3.1.1.

The MQTT protocol allows a message to be sent to a topic based on three levels of QoS (Quality of Service) as explained below.

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Versions Compared

Old Version 4

New Version 5

Key

Message Queueing and Telemetry Transport