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May 13, 2006

More flexibility for Web services using dynamic proxies

The normal Web services tools generate static stubs and ties for RPC style programming. Every time the service is changed these stubs and ties need to be regenerated.

I tried a first approach to loosen this problem using dynamic proxies. For that I wrote a proxy myself that is based on Java 1.3 dynamic proxies.

The advantage is that the remote procedure call is as easy as before and it is possible to change the service without the need to regenerate the stubs and ties. In this case changing the service means that both sender and receiver are changed in the same way.

Nevertheless if sender and receiver have different method interfaces (e.g. the sender thinks the method is void helloWorld(String name) and the receiver's implementation uses void helloWorld(String name, int age) the dynamic proxy approach fails, too (i.e. same RPC problems occur as described earlier).

If the service is changed and all service consumer get the new method interfaces there is no need to regenerate the stubs and ties anymore.

Posted by Dominik Marks at May 13, 2006 12:35 PM

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