JAX-RPC is applicable for writing a Web Service endpoint or a Web Service client in Java. You can use SAAJ for writing SOAP applications in Java, and use JAX-RPC for writing Web Services applications in Java. SOAP is the protocol that Web Services use to communicate. A Web Service has a corresponding WSDL file: an XML document that contains all the information a client needs to know to take advantage of the Web Service.
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I need to write a Web Service as quickly as possible. Just getting into the various Sun XML API's. I take it there is no way to write a Web Service (server) using SAAJ? Would you write the server using JAX-RPC?