If you’ve made it through these
several pages of discussion, you probably are at least partially
convinced that XML-RPC has some usefulness and that it might be the
right solution for some of your development problems. To try to
elaborate on XML-RPC, we now look at building some actual working
Java code using XML-RPC. In the great tradition of programming, we
start with a simple “Hello World” type program. We want
to have our XML-RPC server register a handler. This handler takes in
String parameter, the user’s name,
and returns “Hello” and the user’s name; for
example, the method might return “Hello Brett” when
invoked. Then we need a server to make our handler available for
XML-RPC clients. Finally, we build a simple client to connect to the
server and request the method invocation.
In a practical case, the XML-RPC server and handler would be on one machine, usually a heavy-duty server, and the client on another machine, invoking the procedure calls remotely. However, if you don’t have multiple machines available, you can still use the examples locally. Although this will be much faster than an actual client and server, you can still see how the pieces fit together and get a taste of XML-RPC.
As we said earlier, a lot of work has already gone into RPC, and more recently XML-RPC. Like using SAX, DOM, and JDOM for XML handling, there is no reason to reinvent the wheel when there are good, even exceptional, Java packages in existence for ...