Examples of org.gatein.wsrp.api.extensions.InvocationHandlerDelegate

org.gatein.wsrp.api.extensions.InvocationHandlerDelegate
A delegate that can be used to intercept PortletInvocations and PortletInvocationReponses before they are processed either by the Consumer or Producer. While this is particularly useful to be able to add and process WSRP Extensions that are outside of the WSRP specification, delegates could certainly be used to do more. However, since they have access to raw data from the portal's internal, one must be very careful about what's being done to the invocations and responses as a wrong operation could possibly have disastrous results on the portal's behavior. It is therefore extremely recommended (though not currently enforced) to treat the access to PortletInvocation and PortletInvocationResponse objects as read-only.
On the Consumer side, the consumer InvocationHandlerDelegate can intercept the incoming PortletInvocation from the consumer portal before it is processed by the WSRP stack, i.e. before a WSRP request is sent to the remote producer. On the flip side, the response from the producer can be processed right after the WSRP stack is done with it but before it is processed by the consumer portal.
On the Producer side, the producer InvocationHandlerDelegate can intercept the PortletInvocation that has been created as a translation of the incoming WSRP request before it is sent to the producer portal's portlet container. The response from the portlet container can then be processed before it is handled by the WSRP stack to be sent back to the Consumer. @author Chris Laprun


         // get the portlet container invocation from the RequestProcessor
         final PortletInvocation invocation = requestProcessor.getInvocation();


         // let the producer invocation handler delegate process the invocation before we perform the actual invocation
         final InvocationHandlerDelegate delegate = InvocationHandlerDelegate.producerDelegate();
         if (delegate != null)
         {
            delegate.processInvocation(invocation);
         }


         // get the portlet invoker to perform the invocation
         response = producer.getPortletInvoker().invoke(invocation);


         // let the producer invocation handler delegate get a chance to process the response
         if (delegate != null)
         {
            delegate.processInvocationResponse(response, invocation);
         }


         log.debug(invocationType + " done");


      }

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      {
         throw new InvocationException("Unknown invocation type: " + invocation);
      }


      // allow consumer delegate to pre-process the invocation before we actually invoke the handler
      final InvocationHandlerDelegate delegate = InvocationHandlerDelegate.consumerDelegate();
      if (delegate != null)
      {
         delegate.processInvocation(invocation);
      }


      try
      {
         // invoke the handler
         final PortletInvocationResponse response = handler.handle(invocation);


         // and let the consumer delegate process the response
         if (delegate != null)
         {
            delegate.processInvocationResponse(response, invocation);
         }


         return response;
      }
      finally

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      Registration registration = producer.getRegistrationOrFailIfInvalid(registrationContext);
      RegistrationLocal.setRegistration(registration);
      final PortletInvocation invocation = requestProcessor.getInvocation();


      final InvocationHandlerDelegate delegate = InvocationHandlerDelegate.producerDelegate();
      if (delegate != null)
      {
         delegate.processInvocation(invocation);
      }


      final PortletInvocationResponse response = producer.getPortletInvoker().invoke(invocation);


      if (delegate != null)
      {
         delegate.processInvocationResponse(response, invocation);
      }


      log.debug(invocationType + " done");
      return response;
   }

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      else
      {
         throw new InvocationException("Unknown invocation type: " + invocation);
      }


      final InvocationHandlerDelegate delegate = InvocationHandlerDelegate.consumerDelegate();
      if (delegate != null)
      {
         delegate.processInvocation(invocation);
      }


      try
      {
         final PortletInvocationResponse response = handler.handle(invocation);


         if (delegate != null)
         {
            delegate.processInvocationResponse(response, invocation);
         }


         return response;
      }
      finally

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Related Classes of org.gatein.wsrp.api.extensions.InvocationHandlerDelegate

org.gatein.wsrp.consumer.handlers.InvocationDispatcher

org.gatein.wsrp.producer.handlers.MarkupHandler

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