An old customer recently asked me if I had a solution for how to integrate between their existing JMS infrastructure on Websphere MQ with RabbitMQ.

Although I know that RabbitMQ has the shovel plugin which can bridge between Rabbit instances I've yet not found a good plugin for JMS <-> AMQP forwarding.

The first thing that came to my mind was to utilize a Spring Integration mediation as SI has excellent support for both JMS and Rabbit.

Curious as I am I started a PoC and this is the result. It takes messages of a JMS queue and forwards to an AMQP exchange that is bound to a queue the consumer application is supposed to listen to. I used an external HornetQ instance in JBoss 6.1 as the JMS Provider, but I am 100% secure that the same setup would work for Websphere MQ as they both implement JMS.

Be aware that I've done no performance tweaking or QoS setup yet as this is just a proof-of-concept. For a real setup you'd probably have to think about delivery guarantees versus performance and etc...

The code will be available at a GitHub repository near you soon..

SpringContext in XML:

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/integration"
    xmlns:beans="http://www.springframework.org/schema/beans"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:int-amqp="http://www.springframework.org/schema/integration/amqp"
    xmlns:rabbit="http://www.springframework.org/schema/rabbit"
    xmlns:int-jms="http://www.springframework.org/schema/integration/jms"
    xmlns:int="http://www.springframework.org/schema/integration"
    xsi:schemaLocation="http://www.springframework.org/schema/integration/amqp http://www.springframework.org/schema/integration/amqp/spring-integration-amqp-2.1.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
        http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration-2.0.xsd
        http://www.springframework.org/schema/integration/jms http://www.springframework.org/schema/integration/jms/spring-integration-jms-2.1.xsd
        http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit-1.0.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <beans:bean id="jndiTemplate" class="org.springframework.jndi.JndiTemplate">
        <beans:property name="environment">
            <beans:props>
                <beans:prop key="java.naming.factory.initial">org.jnp.interfaces.NamingContextFactory</beans:prop>
                <beans:prop key="java.naming.provider.url">jnp://localhost:1099</beans:prop>
                <beans:prop key="java.naming.factory.url.pkgs">org.jnp.interfaces:org.jboss.naming</beans:prop>
            </beans:props>
        </beans:property>
    </beans:bean>

    <beans:bean id="jmsQueueConnectionFactory"
      class="org.springframework.jndi.JndiObjectFactoryBean">
        <beans:property name="jndiTemplate">
            <beans:ref bean="jndiTemplate"/>
        </beans:property>
        <beans:property name="jndiName">
            <beans:value>ConnectionFactory</beans:value>
        </beans:property>
    </beans:bean>

    <!-- Channels and adapters for SI -->
    <int-jms:message-driven-channel-adapter connection-factory="jmsQueueConnectionFactory" destination-name="myJmsQueue" channel="rabbitChannel"/>
    <channel id="rabbitChannel"/>
    <int-amqp:outbound-channel-adapter channel="rabbitChannel" exchange-name="fromJmsExchange" amqp-template="rabbitTemplate"/>

    <!-- Connectivity to Rabbit -->
    <rabbit:template id="rabbitTemplate" connection-factory="cf"/>
    <rabbit:connection-factory id="cf" host="localhost"/>

    <!-- Rabbit entities, to be created at context startup -->
    <rabbit:admin connection-factory="cf"/>
    <rabbit:queue name="fromJMS"/>
    <rabbit:direct-exchange name="fromJmsExchange">
        <rabbit:bindings>
            <rabbit:binding queue="fromJMS"/>
        </rabbit:bindings>
    </rabbit:direct-exchange>
</beans:beans>

Maven POM:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.rl</groupId>
    <artifactId>si.jmstorabbit</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>si.jmstorabbit</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <hornet.version>2.2.5.Final</hornet.version>
        <spring.integration.version>2.1.0.RELEASE</spring.integration.version>
    </properties>

    <repositories>
        <repository>
            <id>springsource-release</id>
            <url>http://repository.springsource.com/maven/bundles/release</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>springsource-external</id>
            <url>http://repository.springsource.com/maven/bundles/external</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

    <dependencies>
    <dependency>
       <groupId>org.springframework.integration</groupId>
       <artifactId>spring-integration-core</artifactId>
       <version>${spring.integration.version}</version>
    </dependency>
    <dependency>
       <groupId>org.springframework.integration</groupId>
       <artifactId>spring-integration-file</artifactId>
       <version>${spring.integration.version}</version>
    </dependency>
    <dependency>
       <groupId>org.springframework.integration</groupId>
       <artifactId>spring-integration-amqp</artifactId>
       <version>${spring.integration.version}</version>
    </dependency>
    <dependency>
       <groupId>org.springframework.integration</groupId>
       <artifactId>spring-integration-jms</artifactId>
       <version>${spring.integration.version}</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>3.0.7.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>jboss</groupId>
        <artifactId>jnp-client</artifactId>
        <version>4.2.2.GA</version>
    </dependency>


    <dependency>
            <groupId>org.hornetq</groupId>
            <artifactId>hornetq-core-client</artifactId>
            <version>${hornet.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hornetq</groupId>
            <artifactId>hornetq-jms-client</artifactId>
            <version>${hornet.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hornetq</groupId>
            <artifactId>hornetq-jms</artifactId>
            <version>${hornet.version}</version>
        </dependency>
           <dependency>
            <groupId>jboss</groupId>
            <artifactId>jboss-common-client</artifactId>
            <version>3.2.3</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.netty</groupId>
            <artifactId>netty</artifactId>
            <version>3.2.7.Final</version>
        </dependency>
        <dependency>
            <groupId>javax.jms</groupId>
            <artifactId>jms</artifactId>
            <version>1.1</version>
        </dependency>
  </dependencies>

</project>