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From Lyndon <>
Subject Re: Thread pool strategy
Date Thu, 08 Jul 2004 23:24:21 GMT
David Jencks wrote:

> I've been working with the thread pools and PooledExecutor from 
> concurrent a bit lately and understand how they work a little better 
> than I used to:-)
> I've changed the ThreadPool implementation to:
> have a hard max size limit (and minSize == maxSize)
> have a Queue that all waiting tasks are put on.
> No task is ever executed in the calling thread.
> I think this is the most appropriate policy for all thread pools in 
> geronimo.  I'd be interested in other opinions... I don't consider 
> myself an expert in this.
> I'm not sure if the current implementation ever gets smaller, since 
> the minsize == maxsize.  Having maxSize > minSize would involve 
> writing a LinkedQueue subclass that can communicate with the 
> PooledExecutor to determine if the pool size < maxSize.  I'm reluctant 
> to introduce this complication without evidence that it is needed.
Wow this is actually bringing back memories of IBM's MVS JES... :-)

> Many thanks
> david jencks

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