Sunday, May 30, 2010

Client Request, Thread, and Java EE Container

For each web request, in general, the web container will not create a new servlet instance. Actually only one servelet instance object is needed for each type. But the web container will create a new thread to handle each request. The following link explains well how the web container creates threads and use the servlet instance to serve the new client request.

Similarly, for each new remote client request to the EJB container, the container will create a new EJB object ( and a new thread to handle the request, I think). The EJB object will use a bean instance. But the bean instance does not need to be created everytime. EJB container uses instance pooling for the bean classes.
The following is an article that explains java RMI internal details:

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