I think that helps. I am going to start digging in to this problem this
week. Hopefully should get a prototype working. I'll let you know if I
have more questions.
-Eric
Jeanfrancois Arcand wrote:
> Salut,
>
> Eric Faden wrote:
>> Dead link as in a no longer viable TCP socket. E.g. black holed
>> etc. I want to detect it from the server end and kill the client,
>> and detect it from the client end to start reconnection attempts.
>
> with NIO, when a client close a connection, an NIO Selector wakes up
> and the only way you can detect if the connection has been closed is
> by do an operation on the connection, e.g. channel.read()/write(). So
> if you want to detect a dead connection, you have to register for
> OP_READ events and try to do a read. I know that sucks but that's the
> only way for doing it using NIO. Are the connection created using the
> Grizzly ConnectorHandler? If yes, make sure your CallbackHandler is
> looking for:
>
> channel.read() == -1 or throw IOExceptoion (thanks win32 to act
> differently).
>
> Those 2 use cases happens when the remote server/client close the
> connection.
>
> Does that help?
>
> Thanks
>
> -- Jeanfrancois
>
>
>
>
>>
>> -Eric
>>
>> Jeanfrancois Arcand wrote:
>>> Salut,
>>>
>>> Eric Faden wrote:
>>>> Does anyone have an example of a pinger/heartbeater for dead link
>>>> detection? I have been looking into writing one and am still
>>>> unsure where to put it into the stack.
>>>
>>> By dead link, you mean a dead connection or a dead port on the
>>> server side? Sorry if my question looks stupid :-)
>>>
>>> A+
>>>
>>> --Jeanfrancois
>>>
>>>
>>>>
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