Working example on Spring Mediator in WSO2 ESB 4.6.0

Question

Hi i am working on Spring Mediator in WSO2 ESB 4.6.0, using this and this tutorial

I am getting the Error as follows:

ERROR - SpringMediator Cannot look up Spring configuration conf/sample/resources/spring/springsample.xml

ERROR - SpringMediatorCannot reference application context with key : conf/sample/resources/spring/springsample.xml

Could you please explain me how to solve this.

Answer 1

I got to work this as below,

The class should extends AbstractMediator and override the mediate() method as follows,

package com.test.spring.mediator.workingexampleonspringmediator;

import org.apache.synapse.MessageContext;
import org.apache.synapse.mediators.AbstractMediator;

public class HelloWorld extends AbstractMediator{

           private String message;   
       public void setMessage(String message){
          this.message  = message;
       }

       public boolean mediate(MessageContext arg0) {

          System.out.println("HELLO "+message);
          return true;
    }
}

Then place the jar in [ESBHOME]/repository/components/lib folder

In mediate method it prints a message with the argument like HELLO 'arg'

And I added the following file to registry (/_system/config/repository/spring/springtest.xml),

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC  "-//SPRING//DTD BEAN//EN"
        "http://www.springframework.org/dtd/spring-beans.dtd"> 
<beans>     
   <bean id="springtest" class="com.test.spring.mediator.workingexampleonspringmediator.HelloWorld"  singleton="false">
   <property name="message"><value>ISURU</value></property>
   </bean>
</beans>

My proxy is as follows,

<proxy xmlns="http://ws.apache.org/ns/synapse" name="testSpring" transports="https,http" statistics="disable" trace="disable" startOnLoad="true">
   <target>
      <inSequence>
         <log level="full">
            <property name="START" value="__________________________"/>
         </log>
         <spring:spring xmlns:spring="http://ws.apache.org/ns/synapse" bean="springtest" key="conf:/repository/spring/springtest.xml"/>
         <log level="full">
            <property name="END" value="______________________"/>
         </log>
      </inSequence>
   </target>
   <description></description>
</proxy>

In the proxy you can see the bean=[bean id of the springtest.xml] and class=qualified name of the class

In my ESB terminal, I got the following out put with the given property value in springtest.xml,

[2013-11-07 17:38:30,654]  INFO - LogMediator To: /services/testSpring.testSpringHttpSoap12Endpoint, WSAction: urn:mediate, SOAPAction: urn:mediate, MessageID: urn:uuid:bcae82e9-4027-43c5-bd7a-cbfa885aaf33, Direction: request, START = __________________________, Envelope: <?xml version='1.0' encoding='utf-8'?><soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope"><soapenv:Body/></soapenv:Envelope>
HELLO ISURU
[2013-11-07 17:38:30,692]  INFO - LogMediator To: /services/testSpring.testSpringHttpSoap12Endpoint, WSAction: urn:mediate, SOAPAction: urn:mediate, MessageID: urn:uuid:bcae82e9-4027-43c5-bd7a-cbfa885aaf33, Direction: request, END = ______________________, Envelope: <?xml version='1.0' encoding='utf-8'?><soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope"><soapenv:Body/></soapenv:Envelope>

You must restart the ESB after placing the jar in repository/components/lib