Bean Pool Order

wschroeder Mar 28, 2013 12:45 PM

When the container hits the maximum number of stateless session beans allowed, and the clients of said beans must wait to acquire a bean to use, what order are the waits satisified? Is the longest waiting client the one that gets the next available bean such as with a fair queue, or is it a crap shoot?

In addition, is this behavior defined in the J2EE spec anywhere, or is it up to the implementor?

Wayne

1. Re: Bean Pool Order

sfcoy Mar 28, 2013 10:32 PM (in response to wschroeder)

SLSB pooling strategies are not defined in the JEE specifications.

However, I think any reasonable pooling implementation would work on a FIFO basis.

JBoss AS makes use of a java.util.concurrent.Semaphore with the "fairness" flag set to true to enforce this behaviour.
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2. Re: Bean Pool Order

wschroeder Mar 29, 2013 12:43 PM (in response to sfcoy)

Thank you very much. This is exactly the type of answer I was looking for.

Wayne
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