Message-based SOAP Services
So far, you have examined Web Services largely from an RPC-oriented perspective. For the first part of today, you will examine how message-based Web Services can be used under J2EE.
Message-Style Versus RPC-Style
To a large degree, there is little difference between the mechanics of message-style and RPC-style Web Services. Essentially, a message-style Web Service uses a single operation with a single parameter. This single parameter is an XML document to be processed. There is no reason why you could not define an RPC-style interface that takes a single parameter that is an XML document. Under the covers, in SOAP-land, these interfaces would look largely the same. However, there are some differences in application ...