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| |
| <document> |
| <properties> |
| <title>Apache Synapse - Sample 2</title> |
| </properties> |
| <body> |
| <section name="Sample 2: CBR with Switch Case Mediator"> |
| <div class="xmlConf"><definitions xmlns="http://ws.apache.org/ns/synapse"> |
| |
| <sequence name="main"> |
| <switch source="//m0:getQuote/m0:request/m0:symbol" xmlns:m0="http://services.samples"> |
| <case regex="IBM"> |
| <!-- the property mediator sets a local property on the *current* message --> |
| <property name="symbol" value="Great stock - IBM"/> |
| </case> |
| <case regex="MSFT"> |
| <property name="symbol" value="Are you sure? - MSFT"/> |
| </case> |
| <default> |
| <!-- it is possible to assign the result of an XPath expression as well --> |
| <property name="symbol" expression="fn:concat('Normal Stock - ', //m0:getQuote/m0:request/m0:symbol)"/> |
| </default> |
| </switch> |
| <log level="custom"> |
| <!-- the get-property() XPath extension function allows the lookup of local message properties |
| as well as properties from the Axis2 or Transport contexts (i.e. transport headers) --> |
| <property name="symbol" expression="get-property('symbol')"/> |
| <!-- the get-property() function supports the implicit message headers To/From/Action/FaultTo/ReplyTo --> |
| <property name="epr" expression="get-property('To')"/> |
| </log> |
| <!-- Send the messages where they are destined to (i.e. the 'To' EPR of the message) --> |
| <send/> |
| </sequence> |
| |
| </definitions></div> |
| <subsection name="Objective"> |
| <p> |
| Introduction to the switch-case mediator and manipulating properties set on the |
| messages. |
| </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 2 (repository/conf/sample/synapse_sample_2.xml) |
| <div class="command"> |
| Unix/Linux: sh synapse.sh -sample 2<br/> |
| Windows: synapse.bat -sample 2 |
| </div> |
| </li> |
| </ul> |
| </p> |
| </subsection> |
| <subsection name="Executing the Client"> |
| <p> |
| Execute the sample Axis2 client in the smart client using different symbols |
| such as IBM, MSFT and SUN. |
| </p> |
| <div class="command">ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dsymbol=IBM</div> |
| <div class="command">ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dsymbol=MSFT</div> |
| <div class="command">ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/ -Dsymbol=SUN</div> |
| |
| <p> |
| When the symbol IBM is requested, viewing the mediation logs you will see that |
| the switch mediator's first case for 'IBM' is executed and a local property named |
| 'symbol' is set to 'Great stock - IBM'. Subsequently this local property value |
| is looked up by the log mediator and logged using the 'get-property()' XPath |
| extension function. |
| </p> |
| <div class="consoleOutput">INFO LogMediator - symbol = Great stock - IBM, epr = http://localhost:9000/axis2/services/SimpleStockQuoteService</div> |
| |
| <p> |
| Similarly for the symbol 'MSFT' the second case statement in the switch mediator |
| will be executed which will result in the following log. |
| </p> |
| <div class="consoleOutput">INFO LogMediator - symbol = Are you sure? - MSFT, epr = http://localhost:9000/axis2/services/SimpleStockQuoteService</div> |
| </subsection> |
| </section> |
| <p><a href="../samples.html">Back to Catalog</a></p> |
| </body> |
| </document> |
