Code Example for Listener Portlet (ipc2)

package com.sun.portal.portlet.ipc2;

import com.sun.portal.portletappengine.ipc.EventNotRegisteredException;
import com.sun.portal.portletappengine.ipc.EventRequest;
import com.sun.portal.portletappengine.ipc.EventResponse;
import com.sun.portal.portletappengine.ipc.PortletEvent;
import com.sun.portal.portletappengine.ipc.PortletEventBroker;
import com.sun.portal.portletappengine.ipc.PortletEventListener;
...

/**
* The DecisionPortlet participates in the InterPortletCommunication.
* This consumes the event generated by the PricePortlet which is in the
* same web application.
* This also generates the event that is consumed by the PricePortlet.
*/
public class DecisionPortlet extends GenericPortlet{
   implements PortletEventListener ...
   public void handleEvent(EventRequest ereq, EventResponse eres) {
       String name = ereq.getEventName();
       if (name.equalsIgnoreCase("priceChanged")) {
           String data = (String) ereq.getEventData();
           int price_data = Integer.parseInt(data);
           PortletEventBroker peb = new PortletEventBroker(ereq);
           if (price_data > 500) {
               try {
                   PortletEvent pe = peb.createEvent("highPriceEvent");
                   pe.setEventData(data);
                   pe.fire();
               } catch (EventNotRegisteredException e) {
                   e.printStackTrace();
               }
           } else {
               try {
                   PortletEvent pe = peb.createEvent("lowPriceEvent");
                   pe.setEventData(data);
                   pe.fire();
               } catch (EventNotRegisteredException e) {
                   e.printStackTrace();
               }
           }
           eres.setRenderParameter("price", data);
       } else if (name.equalsIgnoreCase("priceChanged2")) {
           eres.setRenderParameter("price2", name);
       } else if (name.equalsIgnoreCase("priceChanged3")) {
           eres.setRenderParameter("price3", name);
       }
   }
   ...
}