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What is Web Services?

Leslie Chaim
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Joined: May 22, 2002
Posts: 336
In light of The 10 Technologies that Will Help You Stay Employed ...
What is Web Services? Thus far, I am mostly doing back-end development and I am wondering how they may connect.

Normal is in the eye of the beholder

Joined: Jul 22, 2003
Posts: 5
Web Services provides a way to expose pieces of your web application(s) within a servlet container or EJB container. A client doesn't have to be aware of how a service is implemented. It invokes a service indirectly via the container. It relies solely on the WSDL (Web Services Description Language) definition configured in your web app. Within the WSDL you specify the Java methods (interface) in your application that you want to be "web serviced". Next you implement the interface in one of 2 ways: as a stateless session bean running in the EJB container or as a Java class running in the J2EE container. Finally, you arrange the container to listen for incoming SOAP requests and map those requests to the respective implementation (done using WSDL). For SOAP requests, you need to have the JAX-RPC runtime.
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
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