Clustering Atmosphere using Apache TomEE and ActiveMQ

Clustering Atmosphere using Apache TomEE and ActiveMQ is ssssimple. First, just install Apache TomEE, which, fortunalty for us, comes with ActiveMQ!.

Configure TomEE

Just edit conf/tomee.xml and add

        <Resource id="atmosphere" type="javax.jms.Topic" />
        <Resource id="MyJmsResourceAdapter" type="ActiveMQResourceAdapter">
                BrokerXmlConfig =  broker:(tcp://0.0.0.0:61616)
                ServerUrl       =  vm://localhost
        </Resource>

        <Resource id="atmosphereFactory" type="javax.jms.ConnectionFactory">
                ResourceAdapter = MyJmsResourceAdapter
        </Resource>

Atmosphere's Application Configuration

First, add in pom.xml

        <dependency>
            <groupId>org.atmosphere</groupId>
            <artifactId>atmosphere-jms</artifactId>
            <version>2.X</version>
        </dependency>

Next in web.xml or atmosphere.xml

        <init-param>
            <param-name>org.atmosphere.plugin.jms.JMSBroadcaster.JNDINamespace</param-name>
            <param-value>java:comp/env/jms/</param-value>
        </init-param>  

And finally, add in web.xml

    <resource-ref>
        <res-ref-name>jms/atmosphereFactory</res-ref-name>
        <res-type>javax.jms.ConnectionFactory</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>

    <resource-ref>
        <res-ref-name>jms/atmosphere</res-ref-name>
        <res-type>javax.jms.Topic</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>

That's it!