Hi Marc,

I think what Kevin meant (and was more along my interpretation of the original question) is that you can know that a socket has been closed before attempting to write to it, but you cannot know that it's going to be open for writing until you actually write to it. As Jerome pointed out, guaranteed delivery is a more subtle problem that has to be handled differently.

Best wishes,

Bruno.


Marc Larue wrote:
Hi Paul,

Rupy has this functionallity built in: http://rupy.googlecode.com

You get a Service.session(Session, DISCONNECT) event when all of the TCP connections for a session have been forcibly closed.

Unfortunately this doesen't work if you are behind an apache proxy, since it caches and reuses TCP connections.

Cheers,

/marc

On Wed, 13 Aug 2008, Kevin Conaway wrote:

I don't think its possible to check on the state of a Socket without
actually writing to it.

Why do you need to know if a client is still active? Perhaps you could
restructure your problem in a different manner?

On Wed, Aug 13, 2008 at 3:30 PM, Jerome Louvel <[EMAIL PROTECTED]>wrote:

Paul,

Beside intercepting JDK log messages, looking for those IO exceptions,
there
is indeed currently no way to intercept those errors and act on them.
That's
why I suggested a RFE.

As a more general thought, you will never be 100% sure that a client got
your response and successfully processed it unless the client confirms it
to
you via a separate request. For example a client crash could occur right
after he read your response...

But if we can give you more control at Restlet API level, I think this is
valuable.

Best regards,
Jerome Louvel

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