2/09/2011

How to create an E-Mail Listener in Liferay6

An E-Mail Listener is done differently than a ModelListener I wrote about the last time. An E-Mail listener can´t be registered for an entity, it must be registered at the Liferay MessageBus. And this is how you do it:


Create the Listener Class


Implement the MessageListener class like this:



public class MailMessageListener implements MessageListener {


@Override
public void receive(Message arg0) throws MessageListenerException {
System.out.println("You got mail.");
}


}


Register the Listener


In your portlet, upon startup you can register the Mail Listener like this:



MailMessageListener listener = new MailMessageListener();

MessageBusUtil.registerMessageListener(DestinationNames.MAIL, listener);




That´s all you have to do. If you want to register your listener for other Destinations, take a look at the class com.liferay.portal.kernel.messaging.DestinationNames



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If you have any questions, feel free to leave a comment.