Thread pooling in AIO/

[Nord, James]

Hi all,
 
In testing AsyncIO we've noticed if we want to configure the thread pool
to use n threads we need to do 2 things.
 
1) create an Executor service with Executors.newFixedThreadPool(n)
2) AsynchronousChannelGroup.withFixedThreadPool(executor, n)
 
Why do we need to provide n twice?  Shouldn't the ASyncChannel group
just farm off something to the exectutor service and block if needed?
 
The other thing is the default is awfull in our tests - as it seems to
create a new Thread in the pool for each AsyncDatagramChannel  (for 100
multicasts received there were 130+ java threads).
 
Also isn't it the job of the Executor to choose chached pooled or non
pooled not the AsyncChannelGroup?
 
(the pooled version in our test be resulted in 130+ java threads vs 30
when we "tuned" it to a fixed number of 8)
 
Regards,
 
/James
 

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