WSO2 ESB use of Custom Mediator

Question

I like to write a Custom Mediator for the WSO2 ESB. I found some Tutorials for this, but I don't get it working in the WSO2 ESB. I think I maybe have an error in the path I need for the Class Mediator, but let me explain everything:

For writing this Mediator I use the WSO2 developer Studio for Eclipse Juno.

There I created a new ESB Mediator Project called "b64writer" with this content:

package org.wso2.carbon;
import org.apache.synapse.MessageContext; 
import org.apache.synapse.mediators.AbstractMediator;
public class B64Mediator extends AbstractMediator { 
    public boolean mediate(MessageContext context) { 
        // TODO Implement your mediation logic here         
        String inhalt = context.getEnvelope().toString();
        trace.trace("Message: " + inhalt);
        return true;
    }
}

In the next step I created a new Carbon Application Project, with the Mediator selected on "Dependencies". The config for this is:

Group ID: org.wso2.carbon.b64mediator
Artifact ID: b64mediator
Version: 1.0.0

I used the button on the right side to create an archive. This archive I copied to "C:\wso2esb\repository\carbonapps\0".

And now my question: How can I use this Mediator? It should work like this:

<class name="org.wso2.carbon.B64Mediator" />

But it isn't. WSO2 ESB can't find the class. Where's my mistake?

rgayler rgayler · Accepted Answer · 2013-07-31T19:55:41

Ok, I had the same issue as you, and I managed to add the mediator by using the WSO2 Developer Studio add-on for eclipse to make a mediation library. (Bring up the new wizard box, and select WSO2/Extensions/Project Types/Mediator Project)

Then create your mediator or put into the project, and export it as a jar file to the /repository/components/lib folder. You have to restart the ESB every time you update the jar or if you're running the ESB when you add the jar.

I hope this helps.

WSO2 ESB use of Custom Mediator

4 Answers