Skip to content

How to Switch from JMS to HTTP(S)

This example demonstrates how the Micro Integrator receives messages over the JMS transport and forwards them over an HTTP/S transport. In this sample, the client sends a request message to the proxy service exposed in JMS. The Micro Integrator forwards this message to the HTTP endpoint and returns the reply to the client through a JMS temporary queue.

Synapse configuration

Following are the integration artifacts (proxy service) that we can use to implement this scenario. See the instructions on how to build and run this example.

<?xml version="1.0" encoding="UTF-8"?>
<proxy name="JMStoHTTPStockQuoteProxy" startOnLoad="true" transports="jms"
    xmlns="http://ws.apache.org/ns/synapse">
    <target>
        <inSequence>
            <property action="set" name="OUT_ONLY" value="true" />
            <call>
                <endpoint key="SimpleStockQuoteService" />
            </call>
        </inSequence>
        <faultSequence/>
    </target>
    <parameter name="transport.jms.ContentType">
        <rules>
            <jmsProperty>contentType</jmsProperty>
            <default>text/xml</default>
        </rules>
    </parameter>
    <parameter name="transport.jms.Destination">Queue1</parameter>
    <parameter name="transport.jms.ConnectionFactory">myQueueListener</parameter>
</proxy>

<endpoint name="SimpleStockQuoteService" xmlns="http://ws.apache.org/ns/synapse">
   <address uri="http://localhost:9000/services/SimpleStockQuoteService"/>
</endpoint>

Build and Run

Create the artifacts:

  1. Launch Visual Studio Code with the Micro Integrator for VS Code extension (MI for VS Code) installed.

    Info

    Follow the Install Micro Integrator for VS Code documentation for a complete installation guide.

  2. Create an integration project..

  3. Create the proxy service with the configurations given above.
  4. Deploy the artifacts in your Micro Integrator.
  5. Start the selected message broker and create a queue named Queue1.
  6. Configure MI with the selected message broker and start the Micro-Integrator.

Set up the back-end service:

  1. Download the back-end service.
  2. Extract the downloaded zip file.
  3. Open a terminal and navigate to the axis2Server/bin/ directory inside the extracted folder.

  4. Execute the following command to start the axis2server with the SimpleStockQuote back-end service:

    sh axis2server.sh

    axis2server.bat

Publish the following XML message to the Queue1. 

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
   <soapenv:Header/>
   <soapenv:Body>
    <m0:placeOrder xmlns:m0="http://services.samples">
        <m0:order>
            <m0:price>172.23182849731984</m0:price>
            <m0:quantity>18398</m0:quantity>
            <m0:symbol>IBM</m0:symbol>
        </m0:order>
    </m0:placeOrder>
   </soapenv:Body>
</soapenv:Envelope>