Using the HTTP Destination Within the Web Dynpro (SAP Library

Using the HTTP Destination Within the Web Dynpro

Use

Once you have created the HTTP destination on the AS Java, you must specify that this destination is to be used by the Web Dynpro application. For this purpose, you will insert the _setHTTPDestinationName() method in the component controller where the methods for saving, canceling, and viewing reservations are executed.

Prerequisites

	The Web Dynpro perspective is displayed in the SAP NetWeaver Developer Studio.
	The Web Dynpro project, TutWD_CarRental, is displayed in the Web Dynpro Explorer.

Procedure

...

1. If you are not already working in the Web Dynpro perspective in the SAP NetWeaver Developer Studio, then switch to it.

2. Expand TutWD_CarRental ® Web Dynpro ® Web Dynpro Components ® CarRentalComp.

3. Select the Component Controller with a double-click.

The CarRentalComp controller appears.

4. Select the Implementation tab page.

5. Adjust the source code. Insert a call to the _setHTTPDestinationName() method before the execute() method is called. Insert this call in each of the methods execute_ActiveBookings(), execute_Save(), and execute_Cancel().

See the examples below.

Method execute_ActiveBookings()

public void execute_ActiveBookings( )
{
//@@begin execute_ActiveBookings()
      IWDMessageManager msgMgr = wdComponentAPI.getMessageManager();
      try {
//       wdContext.currentActiveBookingsElement().modelObject().execute();
         Request_QuickCarRentalServiceViDocument_viewActiveBookings modObj
                  = wdContext.currentActiveBookingsElement().modelObject();
         modObj._setHTTPDestinationName("CarRental");
         modObj.execute();

         wdContext.nodeResponse_ActiveBookings().invalidate();

      } catch (Exception ex) {
         msgMgr.reportException(ex.getMessage(), false);
      }
//@@end
}

Method execute_Save()

public void execute_Save( )
{
//@@begin execute_Save()
   try {
//    wdContext.currentSaveBookingElement().modelObject().execute();
         Request_QuickCarRentalServiceViDocument_saveBooking modObj =
            wdContext.currentSaveBookingElement().modelObject();
         modObj._setHTTPDestinationName("CarRental");
         modObj.execute();

         wdContext.nodeResponse().invalidate();

         MessageManager msgMgr =
            (MessageManager) wdComponentAPI.getMessageManager();
         msgMgr.reportSuccess("Success! ");

      } catch (Exception ex) {
         MessageManager msgMgr =
            (MessageManager) wdComponentAPI.getMessageManager();
         msgMgr.reportException(ex.getLocalizedMessage(), true);
      }
//@@end
}

Method execute_Cancel()

public void execute_Cancel( )
{
//@@begin execute_Cancel()
      try {
//    wdContext.currentCancelBookingElement().modelObject().execute();
         Request_QuickCarRentalServiceViDocument_cancelBooking modObj =
            wdContext.currentCancelBookingElement().modelObject();
         modObj._setHTTPDestinationName("CarRental");
         modObj.execute();

         wdContext.nodeResponse_CancelBooking().invalidate();

         MessageManager msgMgr =
            (MessageManager) wdComponentAPI.getMessageManager();
         msgMgr.reportSuccess(
            "Success! "
               + wdContext.currentResponse_CancelBookingElement().
                  getResult());

      } catch (Exception ex) {
         MessageManager msgMgr =
            (MessageManager) wdComponentAPI.getMessageManager();
         msgMgr.reportException(ex.getLocalizedMessage(), true);
      }
//@@end
}

6. Save the metadata.

Result

The Web Dynpro application will use this destination to retrieve the logon ticket and pass it to the Web service.

Next Step:

Protecting Access to the EJB Methods Using UME Permissions