How to interrupt without closing

I have a socket, (and optionally a SocketChannel) and I have another thread that is taking the block.
I need to make the other thread finish its execution of the read() method once, (and thus causing it to check a few modified fields), without closing the socket, (like interrupt() does).
The solution needs to not harm the connection in any way (like shutdownInput()) and not stop the thread (like stop()).
Any help would be appreciated, thanks.

You can't implement this in Java as stated. Platform considerations dictated that interrupting a read closes the socket. (I believe this was forced on Sun by Linux.). You will have to use a very short timeout on the read and have the reading thread effectively 'poll' for socket input and/or object changes.
EJP

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How to interrupt without closing

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