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Sams Teach Yourself J2EE™ in 21 Days by Peter Roxburgh, Andy Longshaw, Debbie Law, Dan Haywood, Martin Bond

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Using an RPC-style SOAP-Based Web Service

SOAP grew out of an effort to create an XML-based method invocation mechanism for distributed objects (primarily Microsoft's DCOM). As such, it is an ideal transport for method calls made over Web Services.

RPC-Oriented Web Services

Remote Procedure Calls (RPCs) made over Web-based protocols are essentially no different from those made over other protocols, such as IIOP, DCOM, or JRMP. The calls are usually synchronous (in other words, the client waits for the method to return before continuing). Zero or more parameters of varying types are passed into the call to provide information to process, and zero or more return values are generated to deliver the outputs of the remote method to the client. The ...

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