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  1. Configure WSO2 ESB with Apache ActiveMQ and set up the JMS listener. For instructions, see Configure with ActiveMQ.

    Anchor
    sample
    sample

  2. Create a proxy service with the following configuration.To create a proxy service using ESB Tooling, see Working with Proxy Services via ESB Tooling.

    Code Block
    languagexml
    <proxy xmlns="http://ws.apache.org/ns/synapse" name="JMStoHTTPStockQuoteProxy" transports="jms">
       <target>
           <inSequence>
               <property action="set" name="OUT_ONLY" value="true"/>
           </inSequence>
           <endpoint>
               <address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
           </endpoint>
           <outSequence>
               <send/>
           </outSequence>
       </target>
</proxy>
    Tip

    You can make the proxy service a JMS listener by setting its transport as jms. Once the JMS transport is enabled for a proxy service, ESB will start listening on a JMS queue with the same name as the proxy service. In the sample configuration above,  ESB listens to a JMS queue named JMStoHTTPStockQuoteProxy. To make the proxy service listen to a different JMS queue, define the transport.jms.Destination parameter with the name of the destination queue.

  3. To test this you will need an HTTP back-end service. Deploy the SimpleStockQuoteService and start the Axis2 server. 

  4. Place a message into the Apache ActiveMQ queue by executing the following command from <ESB_HOME>/samples/axis2Client folder.

    Code Block
    languagexml
    ant stockquote -Dmode=placeorder -Dtrpurl="jms:/JMStoHTTPStockQuoteProxy?transport.jms.ConnectionFactoryJNDIName=QueueConnectionFactory&java.naming.factory.initial=org.apache.activemq.jndi.ActiveMQInitialContextFactory&java.naming.provider.url=tcp://localhost:61616&transport.jms.ContentTypeProperty=Content-Type&transport.jms.DestinationType=queue"

    ESB will read the message from the ActiveMQ queue and send it to the back-end service. You will see the following response in the Axis2 Server console:

    Code Block
    Fri Dec 16 10:21:11 GST 2016 samples.services.SimpleStockQuoteService  :: Accepted order #1 for : 7424 stocks of IBM at $ 156.74347214873563

Two-way HTTP Back-end Call

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