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| |
| <document> |
| <properties> |
| <title>Apache Synapse - Sample 302</title> |
| </properties> |
| <body> |
| <section name="Sample 302: Message Injector Task to invoke a Proxy service"> |
| <div class="xmlConf"><![CDATA[<definitions xmlns="http://ws.apache.org/ns/synapse"> |
| <task class="org.apache.synapse.startup.tasks.MessageInjector" name="InjectToProxyTask"> |
| <property name="soapAction" value="urn:getQuote"/> |
| <property name="format" value="soap11"/> |
| <property name="injectTo" value="proxy"/> |
| <property name="proxyName" value="SampleProxy"/> |
| <property name="message"> |
| <m0:getQuote xmlns:m0="http://services.samples"> |
| <m0:request> |
| <m0:symbol>IBM</m0:symbol> |
| </m0:request> |
| </m0:getQuote> |
| </property> |
| <trigger interval="5"/> |
| </task> |
| <proxy name="SampleProxy" transports="http"> |
| <target> |
| <inSequence> |
| <log level="custom"> |
| <property name="MSG" value="SampleProxy invoked"/> |
| </log> |
| <send> |
| <endpoint> |
| <address uri="http://localhost:9000/services/SimpleStockQuoteService"/> |
| </endpoint> |
| </send> |
| </inSequence> |
| <outSequence> |
| <log level="custom"> |
| <property xmlns:ns="http://services.samples" name="Stock_Quote_on" |
| expression="//ns:return/ns:lastTradeTimestamp/child::text()"/> |
| <property xmlns:ns="http://services.samples" name="For_the_organization" |
| expression="//ns:return/ns:name/child::text()"/> |
| <property xmlns:ns="http://services.samples" name="Last_Value" |
| expression="//ns:return/ns:last/child::text()"/> |
| </log> |
| <drop/> |
| </outSequence> |
| </target> |
| </proxy> |
| </definitions>]]></div> |
| <subsection name="Objective"> |
| <p> |
| Demonstrate how to schedule tasks to invoke a Proxy service periodically using |
| the MessageInjector task implementation |
| </p> |
| </subsection> |
| <subsection name="Pre-requisites"> |
| <p> |
| <ul> |
| <li> |
| Deploy the SimpleStockQuoteService in the sample Axis2 server and start Axis2 |
| </li> |
| <li> |
| Start Synapse using the configuration numbered 302 (repository/conf/sample/synapse_sample_302.xml) |
| <div class="command"> |
| Unix/Linux: sh synapse.sh -sample 302<br/> |
| Windows: synapse.bat -sample 302 |
| </div> |
| </li> |
| </ul> |
| </p> |
| </subsection> |
| <subsection name="Executing the Client"> |
| <p> |
| The above configuration adds a scheduled task, and a proxy service to the Synapse |
| runtime. The task is configured to run every 5 seconds (note the 'interval' |
| attribute on the 'trigger' element). |
| </p> |
| <p> |
| In this sample, the proxy service "SampleProxy" will be invoked by the task and |
| then from the proxy service, the injected messages will be sent to the sample |
| Axis2 server, which will send back a response to Synapse. So every 5 seconds you |
| will notice that Axis2 is generating a quote and Synapse is receiving the stock |
| quote response. You will also see the "SampleProxy invoked" message getting |
| logged on the console. |
| </p> |
| </subsection> |
| </section> |
| <p><a href="../samples.html">Back to Catalog</a></p> |
| </body> |
| </document> |
