Sample 470: How to Initialize and use a Spring Bean as a Mediator

Note that WSO2 EI is shipped with the following changes to what is mentioned in this documentation:

<PRODUCT_HOME>/repository/samples/ directory that includes all Integration profile samples is changed to <EI_HOME>/samples/service-bus/.
<PRODUCT_HOME>/repository/samples/resources/ directory that includes all artifacts related to the Integration profile samples is changed to <EI_HOME>/samples/service-bus/resources/.

Objective: Demonstrate how to initialize and use a SpringBean as a mediator.

In your Synapse configuration file, add the Spring bean as shown below:

<definitions xmlns="http://ws.apache.org/ns/synapse"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://ws.apache.org/ns/synapse http://synapse.apache.org/ns/2010/04/configuration/synapse_config.xsd">

    <registry provider="org.apache.synapse.registry.url.SimpleURLRegistry">
        <parameter name="root">file:repository/conf/sample/resources/</parameter>
        <parameter name="cachableDuration">15000</parameter>
    </registry>

    <sequence name="main">
        <!--Setting the Spring Mediator and its Spring Beans xml file location -->
        <!--Note that springtest is the bean id used in springCustomLogger.xml -->
        <spring bean="springtest" key="spring/springCustomLogger.xml"/>
        <send/>
    </sequence>

</definitions>

In the springCustomLogger.xml file, define the Spring bean:

<!DOCTYPE beans PUBLIC  "-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

   <bean id="springtest" class="samples.mediators.extensions.SpringCustomLogger" singleton="false">
	   <property name="username"><value>"Synapse User"</value></property>
	   <property name="email"><value>"[email protected]"</value></property>
   </bean>

</beans>

Prerequisites:

Enable logging for the samples.mediators package by adding the following line to the <ESB_HOME>/repository/conf/log4j.properties file:
log4j.category.samples.mediators=INFO
Deploy the SimpleStockQuoteService in the sample Axis2 server and start it on port 9000.
Start the ESB with sample configuration 470 as follows: wso2ei-samples -sn 470

In this sample, the Spring Bean SpringCustomLogger gets initialized using the springCustomLogger.xml file and then logs the message ID. Invoke the client as follows:

ant stockquote -Daddurl=http://localhost:9000/services/SimpleStockQuoteService -Dtrpurl=http://localhost:8280/

If you have successfully enabled logging for the samples.mediators package, you will see an output similar to the following on the console:

    2010-09-26 20:46:57,946 [-] [HttpServerWorker-1]  INFO SpringCustomLogger Starting Spring Meditor
    2010-09-26 20:46:57,946 [-] [HttpServerWorker-1]  INFO SpringCustomLogger Bean in Initialized with User:["Synapse User"]
    2010-09-26 20:46:57,946 [-] [HttpServerWorker-1]  INFO SpringCustomLogger E-MAIL:["[email protected]"]
    2010-09-26 20:46:57,946 [-] [HttpServerWorker-1]  INFO SpringCustomLogger Massage Id:  urn:uuid:383FA8B27D7CC549D91285514217720
    2010-09-26 20:46:57,946 [-] [HttpServerWorker-1]  INFO SpringCustomLogger Logged....