[zeromq-dev] Dropping connection end points dynamically

Pieter Hintjens ph at imatix.com
Wed Apr 18 23:16:28 CEST 2012

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By curious coincidence, also https://github.com/zeromq/libzmq/pull/317

On Wed, Apr 18, 2012 at 2:23 PM, Radha Krishna Srimanthula
<srimanthula.radhakrishna at gmail.com> wrote:
> Hi,
> My scenario is this:
> I have a set of networked devices, which need to be a part of an
> installation group. Its a requirement to cater to scenarios where existing
> devices can go off the installation and new devices get into the
> installation. Each device does auto-discovery to figure who are in the group
> at any given point in time and communicates to all of 'em using pub-sub, for
> which I am using zeromq.
> The above scenario places an expectation that the subscription list that
> each device maintains change (with addition/ removal of devices from the
> group). In this context, I have a few questions:
> I plan to create the socket, manage the end points and do the pub-sub
> communication in three different threads. For various legacy reasons, I need
> to use the existing threading model -based on pthreads- for now (I plan to
> move to zeromq's threading model later). Is there a potential failure
> scenario here? Is it ok to use three different threads for the above said
> purposes?
> We have mechanisms to create multiple connection end points, one for each
> publisher and subscribe to their updates. In a dynamic scenario like the one
> mentioned above, is there an API to drop an end point and stop subscribing
> to updates from the publisher?
> Any help will be greatly appreciated.
> --
> Regards,
> Radha
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