Re: Limiting Max Number Of Concurrent Requests

[Rodrigo Ruiz]

AFAIK, no mechanism is implemented in Tomcat to limit the number of 
concurrent requests for a specific request.
I think your only option is to implement a Semaphore mechanism to 
control the max number of requests executing your service. Once 
implemented, you could have something like:

public class YourService {
 static private final MAX_REQUESTS = 3;  // for example
 private Semaphore sem = new Semaphore(MAX_REQUESTS);

 public yourMethod() {
   sem.acquire();
   try {
     // your code here
   }
   finally {
     sem.release();
   }
 }
}
For an implementation of Semaphores and other concurrency control 
structures, you can see

http://gee.cs.oswego.edu/dl/cpj/

There you will find a link to the "util.concurrent" library.

Hope this helps,
Rodrigo Ruiz
John Green wrote:

Hello, I am using JBoss, Tomcat, and AXIS 1.1.  Is there a way to 
limit the max number of concurrent requestings for a specific web 
service?  I have one that it a huge memory hog, and processing just a 
few message concurrently can cause out of memory exceptions.
 
Thanks.
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