Transform Events before Publish

Objective: Demonstrate the mediation capability of events before publishing to event sink.

Prerequisites:

Deploy the SimpleStockQuoteService in sample Axis2 server and start it on port 9000.
Start Synapse with the sample configuration 502 (i.e. wso2esb-samples -sn 502).

<!-- Eventing configuration with transformation before publish-->
 <definitions xmlns="http://ws.apache.org/ns/synapse">
      <eventSource name="SampleEventSource">
            <subscriptionManager class="org.apache.synapse.eventing.managers.DefaultInMemorySubscriptionManager">
                <property name="topicHeaderName" value="Topic"/>
                <property name="topicHeaderNS" value="http://apache.org/aip"/>
            </subscriptionManager>
            <subscription id="mysub1">
                 <filter source ="synapse/event/test" dialect="http://synapse.apache.org/eventing/dialect/topicFilter"/>
                 <endpoint><address uri="http://localhost:9000/services/SimpleStockQuoteService"/></endpoint>
            </subscription>
      </eventSource>


     <sequence name="PublicEventSource">
            <log level="full"/>
            <xslt key="xslt-key-req"/>
            <log level="full"/>
            <eventPublisher eventSourceName="SampleEventSource"/>
     </sequence>

     <proxy name="EventingProxy">
         <target inSequence="PublicEventSource" />
     </proxy>

     <localEntry key="xslt-key-req" src="file:repository/conf/sample/resources/transform/transform_eventing.xslt"/>
 </definitions>

In this sample, the event (order request) transform to a new order with different namespace using XSLT Mediator.

Invoke the client (Sender) as follows.

ant eventsender

The event is published after transformation.