ActiveMQ Event Receiver

ActiveMQ JMS event receiver is an internal event receiver that comes with WSO2 products by default. You can configure it with XML, map, JSON, and text input mapping types.

Prerequisites

Follow the steps below to set up the prerequisites before starting the configuration.

Install Apache ActiveMQ JMS.

This guide uses ActiveMQ versions 5.7.0 or below. If you want to use a later version, for instructions on the necessary changes to the configuration steps, go to Apache ActiveMQ Documentation.
Add the following ActiveMQ JMS-specific JAR files to <DAS_HOME>/repository/components/lib/ directory.
- <ACTIVEMQ_HOME>/lib/activemq-core-xxx.jar
- <ACTIVEMQ_HOME>/lib/geronimo-j2ee-management_1.1_spec-1.0.1.jar
Start the ActiveMQ JMS server.

Creating an ActiveMQ JMS event receiver

For instructions on creating an ActiveMQ JMS event receiver, see Configuring Event Receivers .

Configuring adapter properties

Specify the Adapter Properties , when creating an ActiveMQ JMS event receiver using the management console as shown below.

After entering the above adapter properties, select the Event Stream to which you want to map the incoming events, and the Message Format which you want to apply on the receiving events . Also, click Advanced to define custom input mappings based on the Message Format you selected. For more information on custom input mapping types, see Input Mapping Types .

You can also define the respective adapter properties of the event receiver based on the transport type within the <from> element of the event receiver configuration in the <PRODUCT_HOME>/repository/deployment/server/eventreceivers/ directory as follows.

<eventReceiver name="ActiveMQJMSInputEventAdapter" statistics="disable"
    trace="disable" xmlns="http://wso2.org/carbon/eventreceiver">
    <from eventAdapterType="jms">
        <property name="java.naming.factory.initial">org.apache.activemq.jndi.ActiveMQInitialContextFactory</property>
        <property name="java.naming.provider.url">tcp://localhost:61616</property>
        <property name="transport.jms.DestinationType">topic</property>
        <property name="transport.jms.SubscriptionDurable">true</property>
        <property name="transport.jms.Destination">Test Topic</property>
        <property name="transport.jms.DurableSubscriberClientID">wso2dasclient1</property>
        <property name="transport.jms.ConnectionFactoryJNDIName">TopicConnectionFactory</property>
    </from>
    ......................
</eventReceiver>

The above adapter properties are described below.

Adapter Property	Description	Configuration file property	Example
Topic/Queue Name	A string of characters to denote a valid name of a JMS topic to subscribe to, or named queue to use when WSO2 CEP/DAS sends and receives messages.	transport.jms.Destination	Test Topic
JNDI Initial Context Factory Class	JNDI initial context factory class. The class must implement the `java.naming.spi.InitialContextFactory` interface.	java.naming.factory.initial	org.apache.activemq.jndi.ActiveMQInitialContextFactory
JNDI Provider URL	URL of the JNDI provider.	java.naming.provider.url	tcp://localhost:61616
The JMS connection password	A valid password for the JMS connection.	transport.jms.Password	jms-password
The JMS connection username	A valid username for the JMS connection.	transport.jms.UserName	jms-user
Connection Factory JNDI Name	The JNDI name of the connection factory.	transport.jms.ConnectionFactoryJNDIName	TopicConnectionFactory
Destination Type	The sort order for messages that arrive on a specific destination.	transport.jms.DestinationType	topic/queue
Enable Durable Subscription	Whether the subscription is durable or not.	transport.jms.SubscriptionDurable	true/false
Durable Subscriber Name	A string of characters to denote a valid id for client connecting as the durable subscriber. (It will enable durable subscription if you add any value here).	transport.jms.DurableSubscriberClientID	subscriber
JMS Properties	Valid property and value pairs to denote Axis2 JMS properties (e.g. "property1: value1, property2: value2") For more information on Axis2 JMS properties, go to Apache AXIS2 Transports Documentation.	jms.properties	SessionTransacted:false

Related samples

For more information on ActiveMQ event receiver type, see the following samples in WSO2 CEP Documentation.