456 Oracle SOA Suite 11g Handbook FIGURe 13-27. Invoking the RESTful service RESTAppointmentsService to retrieve the status of an appointment Parallel Processing of Appointment Requests Using Split-Join External parties can upload files with multiple patient appointment requests, instead of invoking the PatientAppointmentService for every individual request. We showed in Chapter 7 how a File Adapter Service together with a Mediator component took care of these files and every single request in it. The composite application developed in that chapter did not return the list of appointment identifiers to the sender of the file--one of its shortcomings. Therefore, Margaret and her team have decided to expose a Web Service that allows a number of appointment request messages to be sent in one batch, rather than requiring individual calls for