Chapter 30. Investigating Web Service Consumers
OBJECTIVES
Compare synchronous and asynchronous calls to Web Service methods
Learn to create the required procedure for callbacks in order to call a Web Service asynchronously
When you create a client application that consumes a method from a Web Service, most likely your application simply calls a method in the object provided by the Web Service—or so it would seem. Your code doesn't actually call a method in some remote object—that wouldn't make any sense. Under the covers, your code is calling a method in a local object that knows how to contact the remote Web Service and execute the method using SOAP. This local object then retrieves a return value from the remote Web Service method and returns ...
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