Programming Web Services with XML-RPC by Simon St. Laurent

By Simon St. Laurent

XML-RPC, an easy but strong method outfitted on XML and HTTP, shall we builders attach courses working on diverse pcs with not less than fuss. Java courses can consult Perl scripts, that can check with ASP functions, etc. With XML-RPC, builders grants entry to performance with no need to fret concerning the procedure at the different finish, so it is easy to create net companies.

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Lang. "); } } private String nameTester(String first, String last) { return "Reversed: " + last + ", " + first; } } Classes that implement the AuthenticatedXmlRpcHandler interface instead of XmlRpcHandler can process the username and password pairs from basic authentication as well as the method names and parameters, giving them additional gateway functionality. You'll want to implement a more sophisticated password checking mechanism -- and perhaps move it to a separate class to be shared among various handlers.

Although some of XML-RPC's rules, like its lack of support for void return values, make integrating XML-RPC with Java difficult, most of the integration process is pretty simple, limited only by the narrow range of data types and structures XMLRPC supports. The XML-RPC library for Java does not require the methods it uses be static, but in some ways static methods fit the basic architecture of XML-RPC very well. Static methods are the closest things Java offers to procedural function calls, commonly used for utility functions (such as those in the Math class) for which the function itself is important, but there may not be any surrounding context.

Or XmlRpcException, which is issued when the XML-RPC server reports an error. The constructor accepts a String object representing a URL, a URL object, or the combination of a String for the hostname and an int for the port. XmlRpcClient objects are reusable, though they only connect to the server originally specified when they were constructed. Applications that establish repeated connections to the same server may want to reuse the objects, but many applications just create the client, call a method, and disappear.

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