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Introduction

This sample demonstrates how one way message bridging from JMS to HTTP can be done using the inbound JMS endpoint.

Prerequisites

  • Download and set up Apache ActiveMQ. Instructions can be found in section Installation Prerequisites. 
  • Copy the following client libraries from the <AMQ_HOME>/lib directory to the <ESB_HOME>/repository/components/lib directory.  

             ActiveMQ 5.8.0 and above  
      • activemq-broker-5.8.0.jar
      • activemq-client-5.8.0.jar
      • geronimo-jms_1.1_spec-1.1.1.jar
      • geronimo-j2ee-management_1.1_spec-1.0.1.jar
      • hawtbuf-1.9.jar  

             Earlier version of ActiveMQ

      • activemq-core-5.5.1.jar

      • geronimo-j2ee-management_1.0_spec-1.0.jar

      • geronimo-jms_1.1_spec-1.1.1.jar

Building the sample

The XML configuration for this sample is as follows:

 <definitions xmlns="http://ws.apache.org/ns/synapse">
   <registry provider="org.wso2.carbon.mediation.registry.WSO2Registry">
      <parameter name="cachableDuration">15000</parameter>
   </registry>
   <taskManager provider="org.wso2.carbon.mediation.ntask.NTaskTaskManager">
      <parameter name="cachableDuration">15000</parameter>
   </taskManager>
   <inboundEndpoint xmlns="http://ws.apache.org/ns/synapse" name="jms_inbound" sequence="request" onError="fault" protocol="jms" suspend="false">
      <parameters>
         <parameter name="interval">1000</parameter>
         <parameter name="transport.jms.Destination">ordersQueue</parameter>
         <parameter name="transport.jms.CacheLevel">1</parameter>
         <parameter name="transport.jms.ConnectionFactoryJNDIName">QueueConnectionFactory</parameter>
         <parameter name="sequential">true</parameter>
         <parameter name="java.naming.factory.initial">org.apache.activemq.jndi.ActiveMQInitialContextFactory</parameter>
         <parameter name="java.naming.provider.url">tcp://localhost:61616</parameter>
         <parameter name="transport.jms.SessionAcknowledgement">AUTO_ACKNOWLEDGE</parameter>
         <parameter name="transport.jms.SessionTransacted">false</parameter>
         <parameter name="transport.jms.ConnectionFactoryType">queue</parameter>
      </parameters>
   </inboundEndpoint>
   <sequence name="request" onError="fault">
      <call>
         <endpoint>
            <address format="soap12" uri="http://localhost:9000/services/SimpleStockQuoteService"/>
         </endpoint>
      </call>
      <drop/>
   </sequence>
</definitions>

This configuration file synapse_sample_901.xml is available in the <ESB_HOME>/repository/samples directory.

To build the sample

  1. Start the ESB with the sample 901 configuration. For instructions on starting a sample ESB configuration, see Starting the ESB with a sample configuration.
    The operation log keeps running until the server starts, which usually takes several seconds. Wait until the server has fully booted up and displays a message similar to "WSO2 Carbon started in n seconds."

  2. Start the Axis2 server. For instructions on starting the Axis2 server, see Starting the Axis2 server.

  3. Deploy the back-end service SimpleStockQuoteService. For instructions on deploying sample back-end services, see Deploying sample back-end services.

Executing the sample

To execute the sample client

  • Log on to the ActiveMQ console using the http://localhost:8161/admin url.
  • Browse the queue ordersQueue listening via the above endpoint.
  • Add a new message with the following content to the queue:

    <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsa="http://www.w3.org/2005/08/addressing">
        <soapenv:Body>
        	<m0:getQuote xmlns:m0="http://services.samples"> 
            	<m0:request>
                	<m0:symbol>IBM</m0:symbol>
                </m0:request>
            </m0:getQuote>
        </soapenv:Body>
    </soapenv:Envelope>

Analyzing the output

You will see that the JMS endpoint gets the message from the queue and sends it to the stock quote service.

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