Inter Portlet Communication between Pageflows in Weblogic Portal

Well, Weblogic documentaions are too good, but I had to put considerable effort to make it work. To explain the inter portlet communication between two pageflow let's take this use case.

1. Pageflow PublisherController will publish a custom event.
2. Published custom event will carry a payload.
3. This custom event will be consumed by ConsumerController pageflow.
4. It will extract the payload from the event.

Publisher pageflow

@Jpf.Controller
public class PublisherController extends PageFlowController {
@Jpf.Action(forwards = { @Jpf.Forward(name = "success", path = "index.jsp") })
public Forward publish() {
 PortletBackingContext ctx = PortletBackingContext.getPortletBackingContext(getRequest());
 ctx.fireCustomEvent("myCustomEvent", "I am from Publisher pageflow.");
 return new Forward("success");
   }
}

Backing file

public class EventBacking extends AbstractJspBacking {
 public void captureEvent(HttpServletRequest request, HttpServletResponse response, Event event) {
  CustomEvent custEvent = (CustomEvent)event;
  Serializable payload = (Serializable)custEvent.getPayload();
  PortletBackingContext ctx = PortletBackingContext.getPortletBackingContext(request));
  String ipcPayloadAttrName = ctx.getInstanceId() + "_ipcPayload";
  HttpSession session = request.getSession();
  session.setAttribute(ipcPayloadAttrName, payload);
 }
}

Consumer pageflow

@Jpf.Controller()
public class ConsumerController extends PageFlowController {
 @Jpf.Action(forwards = { @Jpf.Forward(name = "default", path = "index.jsp") })
 public Forward consume() {
  PortletBackingContext ctx = PortletBackingContext.getPortletBackingContext(getRequest());
  String message = (String)getSession().getAttribute(ctx.getInstanceId() + "_ipcPayload");
  getSession().removeAttribute(ctx.getInstanceId() + "_ipcPayload");
  return new Forward("default");
 }
}

To be contd...