[zeromq-dev] How to detect if a remote socket has closed

[David.Briant at ubs.com]

chrs. Newbie Q. A DEVICE is a ZMQ concept right? presumable implemented
in C/C++?

 

I implemented a peer-to-peer async messaging system (in VB6 of all
things) that did all this 10+ years ago for a financial institution -
they still use it. It had basic messaging, resource discovery, pub-sub,
reliable (guaranteed) messaging, failover etc.

 

I'm used to doing all the application stuff (heartbeats, resource
discovery) over the one channel rather than needing to have several
sockets to get the overall functionality.

 

I thought about re-implementing it but came across zmq that I am still
hoping will provide all the bits and bobs.

 

________________________________

From: zeromq-dev-bounces at lists.zeromq.org
[mailto:zeromq-dev-bounces at lists.zeromq.org] On Behalf Of Matt Weinstein
Sent: Tue 17-Aug-2010 13:15
To: 0MQ development list
Subject: Re: [zeromq-dev] How to detect if a remote socket has closed

 

You're stuck with TCP timeout AFAIK.

 

You're probably better if building a heartbeat mechanism using a
specialized DEVICE.  This will give you failover as well.

 

It's a "little" wonky to implement until you can move sockets between
threads (the connect() call can have significant latency, so it needs to
run a separate thread).

 

On Aug 16, 2010, at 1:26 PM, <David.Briant at ubs.com>
<David.Briant at ubs.com> wrote:





I'm coding in python and I can't figure out how to detect if a remote
process has closed or terminated (I exited my python server and judging
from the cpu usage zmq is trying to re-establish connection but I just
can't see how to determine that in the API). Is it possible? and if so
how do I do it.

 

Thx

 

David

 

PS I'm sure this must have been asked before but I've spent the last
hour looking through the archives and I can't find it so apologies in
advance if I'm asking an "obvious" question.

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