Time for action – specifying message event activities

To throw the fault and to exit the process, we will perform the following steps:

1. Open the BookWarehousingBPEL process. We will drag-and-drop the <throw> activity to the message event handler scope.
2. Name the <throw> activity ThrowCancelInstance.
3. Double-click on the ThrowCancelInstance activity and then specify the Fault QName. The Namespace URI is the same as for the BPEL process itself: http://packtpub.com/Bookstore/BookwarehousingBPEL. The Local Part name should be CancelInstance. We will not specify the Fault Variable as the BPEL faults do not require a variable:
   
4. Next, drag-and-drop the <exit> activity and place it after the <throw> activity. This way the process will terminate. We should see the following BPEL diagram:
   

What just happened?

We have added activities that will execute once the OnEvent message handler is triggered. We have decided to throw a fault and to exit the process instance. The following...