Re: Exception Listener in servicemix

[pratibhaG]

Bruce,

May i request you to please explain this:
"To use this with ServiceMIx, you simply register it as a service in
the servicemix.xml file using the XBean element in the class level
XBean annotation (exceptionListenerService). "

Can I create a servicemix-bean component and write something like this in
the xbean.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:bean="http://servicemix.apache.org/bean/1.0";
           xmlns:esb="http://esbinaction.com/errorhandling";>

        <bean:endpoint service="esb:errorComponent"
                endpoint="errorEndpoint"
                bean="#errorBean"/>
 
        <bean id="errorBean" class="errorhandling.ExceptionListenerService"
/>

</beans>

Then the code that you have written can I use like this. I am not sure about
configuring your code like this, that is putting it in a bean. would it work
if I write something like this. Here the code I have copied from yours only
but I am not sure where to put it.

package errorhandling;

import javax.jbi.messaging.MessageExchange;

import org.apache.servicemix.jbi.event.ExchangeEvent;
import org.apache.servicemix.jbi.event.ExchangeListener;

/**
 * An [EMAIL PROTECTED] org.apache.servicemix.jbi.event.ExchangeListener}
implementation
 * to handle exception customization.
 *
 * @org.apache.xbean.XBean element="exceptionListenerService"
 * @version $Revision$
 * @author bsnyder
 */
public class ExceptionListenerService implements ExchangeListener {

    public void exchangeAccepted(ExchangeEvent event) {
        // TODO Auto-generated method stub

    }

    public void exchangeSent(ExchangeEvent event) {
        MessageExchange me = event.getExchange();
        Exception exception = null;

        if (me.getError() != null) {
            exception = analyzeException(me);
        }

        me.setError(exception);
    }

    /**
     * This method abstracts any special exception handling behavior.
     *
     * @TODO Abstract this further using pluggable strategies to hold the
     * custom functionality. Then we just stuff the strategies that are
     * named in the servicemix.xml config into an array and just walk the
     * array, invoking the execute method on each strategy.
     *
     * @param error The exception that was thrown
     * @param endpointName The name of the endpoint that threw the exception
     * @return
     */
    private Exception analyzeException(MessageExchange me) {
        Exception error = me.getError();
        String serviceName = me.getEndpoint().getServiceName().toString();
        String endpointName = me.getEndpoint().getEndpointName();
        String errorMessage = error.getMessage();

        // Add calls to custom processing here

        StringBuilder newErrorMessage =
            new StringBuilder("The following error was caused by service:
[");
        newErrorMessage.append(serviceName != null ? serviceName : "null");
        newErrorMessage.append("] and endpoint: [");
        newErrorMessage.append(endpointName != null ? endpointName :
"null");
        newErrorMessage.append("] ");
        newErrorMessage.append("Original error: ");
        newErrorMessage.append(errorMessage);

        return new Exception(newErrorMessage.toString(), error);
    }

}

I don't use servicemix.xml file to start my application on bus. I create a
zip file of application and put it inside SMX-HOME/hotdeploy. Please........
Help me to use your solution.

Thanks,
Pratibha
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