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JSON and multiple Servlets

 
Greenhorn
Posts: 3
Spring Java
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I am writing a GWT+Google DataStore app which will use JSON as data exchange format. There are multiple calls/operations which client will invoke to server. My query is, if I have to write to Servlets which return JSON data, so

1) A single servlet serves all requests. Server will recognize which function to be called based on some flag passed as part of request
2) For each and every such operation I write a seperate servlet

Any other/better options?
 
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I'd probably break it down by domain rather than by function. So if I had User operations, I'd use a UserServlet and if I had Product operations, I might utilize a ProductServlet.
 
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