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I am going to write a smart client application. This application will be swing based desktop client that will communicate with web service. I want to be a message has been sent to client from web service when any change occurs at server side file system. I wanted to use web services but I am not sure how I would implement a two-way communication between the server and client. Is it possible? If so how? If not what are the alternatives?
You have to program your client to be able to ping a request after a predefined frequency to check if there is a changes occurred on the server side. The client expect the changes occurred on the server or null if no change.