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Thread safe and servlets (Action servlet)

 
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I have my own Action classes that extend
org.apache.struts.action.Action
I understand that the Action class is a Servlet.
Is it compulsory that all Servlets (Action class in this context) be thread-safe ?
When multiple requests from multiple browsers hit the app server, the container will instantiate 1 servlet for each request right ? (and not many clients share 1 servlets - multi threads running 1 servlet, right ?)
If it is always 1 servlet for each request (single thread running a servlet at any one time), then it it is ok even if the action class is not thread-safe ?

Thanks.
 
Timothy Toe
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Ooppss... I think I cause confusion for my question.
What I was talking was the Action class and not Action servlet.

Hope this clarifies.
Thanks.
 
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