How to use mutex in uploading file

Hi, All
I used myfaces upload component. It works all right for me. Because I had a lot of process for the uploaded file and it might take long. So I'd like page to return (tell users that the file is in process) after successfully upload the file and let another "thread" or something else continue to work on the file.
Is this possible to do? and how? Any code will be very welcome.
Thx

Just spawn a new Thread? Read on the Thread and Runnable API's.
Thread API: http://java.sun.com/javase/6/docs/api/java/lang/Thread.html
Runnable API: http://java.sun.com/javase/6/docs/api/java/lang/Runnable.html
Cuncurrency tutorial: http://java.sun.com/docs/books/tutorial/essential/concurrency/index.html

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