Re: Java Executor framework and blocking IO.

Knute Johnson <>
Fri, 11 Sep 2009 08:23:40 -0700
The Dude wrote:


I am working on an application where I launch a number of blocking
server sockets, each in a different thread.

I need to be able to cancel each thread independently.

I have been reading Java - Concurrency in paractice and the advice is
to use the Executor framework rather then managing threads myself.

Initially it looks like that is exactly what I need - I can submit a
Rnnable object and obtain a Future object which can be used to cancel
the task.

I believe that Future.cancel()interrupts the relevant thread.

Great, except blocking IO operations do not recive the interrupt and
the thread carries on regardless?

Can anyone tell me if it possible to cancel blocking operations in the
Executor framework or am I going to have to stick with my current
working (but less elegant) solution of providine an explicit cancel
method in my runnable and calling that when I want to stop the thread?

Cheers for any help.

Close the socket.


Knute Johnson
email s/nospam/knute2009/

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