The Message Broker profile of WSO2 EI uses Advanced Message Queueing Protocol (AMQP) as the transport protocol for brokering messages between publishers and subscribers. The Advance Message Queueing Protocol (AMQP) is a wire-level messaging protocol used by WSO2 MB for message queueing.
The topics below explain how these protocols are enabled and configured for the EI Message Broker profile:
Enabling the transport
The <EI_HOME>/wso2/broker/conf/broker.xml file contains parameters related to configuring the AMQP transport. The transport can be enabled as shown in the following extract of the broker.xml file:
<amqp enabled="true">
<!-- most of the amqp configurations reside in qpid-config.xml since we inherit the qpid messaging model during AMQP.-->
<port>5672</port>
<sslPort>8672</sslPort>
<maximumRedeliveryAttempts>10</maximumRedeliveryAttempts>
<allowSharedTopicSubscriptions>false</allowSharedTopicSubscriptions>
<allowStrictNameValidation>true</allowStrictNameValidation>
</amqp>
Related Parameters
| Parameter Name | Description | Default Value |
|---|---|---|
| enabled | If the value of this parameter is true, the AMQP transport is enabled and the AMQP protocol will be applied to messages sent to the specified listening port. | true |
| port | The listening port specified for the AMQP transport. The AMQP broker would be initialized with this port by default. | 5672 |
| sslPort | The listening SSL port for the specified AMQP transport. The AMQP security socket will be initialized with this port by default. | 8672 |
| maximumRedeliveryAttempts | The maximum number of times the broker should attempt to redeliver a message that has not reached a subscriber. For example, when this value is set to 10, another 10 attempts will be made to deliver the message. The default value can be changed depending on your reliability requirements. | 10 |
| allowSharedTopicSubscriptions | If this parameter is true, a durable subscription to a topic can be shared among multiple subscribers. That is, multiple clients can subscribe to a topic in the broker using the same client ID. Read more about durable subscriptions to topics. | false |
| allowStrictNameValidation | If this parameter is true, the queue names and topic names will be validated according to the AMQP specification. When this parameter is set to false, it is possible to use ":" in topic names. | true |
Refer the description of the broker.xml file for further details.