users@grizzly.java.net

Re: Detecting Connection closed when using ProtocolParser

From: Oleksiy Stashok <Oleksiy.Stashok_at_Sun.COM>
Date: Fri, 23 May 2008 17:22:50 +0200

> we also have an issue on that:
>
> https://grizzly.dev.java.net/issues/show_bug.cgi?id=85
>
> whrere Alexey commented the situation.
>
> Oleksiy Stashok wrote:
>> Hello John,
>> try to extends Default or Base SelectionKeyHandler (depends which
>> one you're using) and override method cancel(SelectionKey) - IMHO
>> it will be the right place to be notified about closed connections.
>
>
> I'm not 100% sure. How will you know the key has been canceled by
> the user of because of a -1 (BTW win32 will thrown an IOException,
> and never return -1).

Right, so as I said, IMHO it's better to override
SelectionKeyHandler.cancel(SelectionKey), which should be common
solution :)

Thanks.

WBR,
Alexey.
>
>
> Thanks!
>
> -- Jeanfrancois
>
>
>> WBR,
>> Alexey.
>> On May 23, 2008, at 14:30 , John ROM wrote:
>>> Hello,
>>>
>>> I'm testing in my code all kinds of Connection-broken situations.
>>>
>>> I have an ProtocolParser on the Client.
>>>
>>> During a lengthy read operation I just testwise kill the server.
>>>
>>> The ReadFilter then correcty reads -1 which I think
>>> is the NIO Way of reporting a closed Connection.
>>>
>>> Now the current selectionKey gets correctly canceled by Grizzly.
>>>
>>> Now I would somehow like to get a notice of that -1 Event but don't
>>> know where to hook myself in?
>>>
>>> Right now I am considering of using a second thread and
>>> to keep sending short messages to the server and by this detecting
>>> the closed connection on a write. Would that me the most elegant
>>> way?
>>>
>>> many Greetings
>>>
>>> John
>>>
>>>
>>>
>>>
>>>
>>> --
>>> Psssst! Schon vom neuen GMX MultiMessenger gehört?
>>> Der kann`s mit allen: http://www.gmx.net/de/go/multimessenger
>>>
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