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| |
| <document> |
| <properties> |
| <title>Apache Synapse - Sample 400</title> |
| </properties> |
| <body> |
| <section name="Sample 400: Message Splitting and Aggregation"> |
| <div class="xmlConf"><definitions xmlns="http://ws.apache.org/ns/synapse"> |
| |
| <proxy name="SplitAggregateProxy"> |
| <target> |
| <inSequence> |
| <iterate xmlns:m0="http://services.samples" expression="//m0:getQuote/m0:request" |
| preservePayload="true" attachPath="//m0:getQuote"> |
| <target> |
| <sequence> |
| <send> |
| <endpoint> |
| <address |
| uri="http://localhost:9000/services/SimpleStockQuoteService"/> |
| </endpoint> |
| </send> |
| </sequence> |
| </target> |
| </iterate> |
| </inSequence> |
| <outSequence> |
| <aggregate> |
| <onComplete xmlns:m0="http://services.samples" |
| expression="//m0:getQuoteResponse"> |
| <send/> |
| </onComplete> |
| </aggregate> |
| </outSequence> |
| </target> |
| </proxy> |
| |
| </definitions></div> |
| <subsection name="Objective"> |
| <p> |
| Showcase how Synapse can be used to split a message into multiple fragments |
| using the iterate mediator, and process them separately. The sample also shows |
| how to use the aggregate mediator to combine multiple messages into one. |
| </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 400 (repository/conf/sample/synapse_sample_400.xml) |
| <div class="command"> |
| Unix/Linux: sh synapse.sh -sample 400<br/> |
| Windows: synapse.bat -sample 400 |
| </div> |
| </li> |
| </ul> |
| </p> |
| </subsection> |
| <subsection name="Executing the Client"> |
| <p> |
| In this sample, the message sent to Synapse is comprised of a number of elements |
| of the same type. When Synapse receives this message it will iterate through those |
| elements and then will send each of them to the specified endpoint as separate |
| messages. When all the responses are received by Synapse, those messages will be |
| aggregated to form the resultant response and will send back to the client. |
| </p> |
| <p> |
| To try this out invoke the sample client as follows. |
| </p> |
| <div class="command">ant stockquote -Daddurl=http://localhost:8280/services/SplitAggregateProxy -Ditr=4</div> |
| <p> |
| The above command will send a request containing four fragments in it. The |
| iterate mediator therefore will break up the message into four. You will notice |
| that Axis2 server is receiving 4 requests from Synapse. Four responses from Axis2 |
| will be combined into one by the aggregate mediator and sent back to the sample |
| Axis2 client. |
| </p> |
| </subsection> |
| </section> |
| <p><a href="../samples.html">Back to Catalog</a></p> |
| </body> |
| </document> |
