Inter Portlet Communication:
Step 1
Use the service.xml
In that make sure that the mbean type and mbean register id should match
Get the entry of implementation class in the service.xml file
Step 2
Write –Object.xml, in that provide the listener element and mention the mbean type that u mentioned in the service.xml
Step 3
Write the class that implements Portalnodeeventlistener
This interface has got the default method called onEvent(PortletnodeEventBubbler bubler, PortalnodeEvent event )