Struts 2 - Interceptor reset the response JSON Object

Question

I am using Struts 2 in my web application. I write code to check user session into interceptor but while I am returning net.sf.json.JSONObject as response, its

Answer 1

There are mutliple errors in your code.

• Response is HttpServletResponse, you should not give that name to a JSONObject.
• Interceptors are NOT THREAD-SAFE, that means that you should define the JSONObject inside the method, to prevent multiple users to update it concurrently, one over the other
• You should use statusCode or errorCode as described in the JSON plugin documentation, by configuring it as the Error result you are returning:

Use statusCode to set the status of the response:

<result name="error" type="json">
  <param name="statusCode">304</param>
</result>

And errorCode to send an error(the server might end up sending something to the client which is not the serialized JSON):

 <result name="error" type="json">
  <param name="errorCode">404</param>
</result>

and then read it client-side in the AJAX callback function.