How to handle concurrency in Java servlets

Question

In my servlet doPost method, I need to access the file (share) and update the file. How can I serve about 100 users using this at the same time?

Regards, Mithun

Answer 1

• Create a separate singleton class for accessing files.
• Use Read and WriteLock from the java.util.concurent package to protect access to files.
• Cache, so you won’t need to read the file if all you have to do is return the contents of the file.

Answer 2

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Answer 3

With a high level of concurrency (for writing), synchronization will cost you a lot of bandwidth.

Databases are more adequate to handle this, if possible in your project.

Answer 4

I would use the java.util.concurrent packages added in Java 1.5. In particular, BlockingQueue for the request queue and processing them in the second thread pool.