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<H1>[99s-extend] [erlang-questions] How to broadcaset with ranch?</H1>
<B>Sean Cribbs</B>
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TITLE="[99s-extend] [erlang-questions] How to broadcaset with ranch?">seancribbs at gmail.com
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<I>Wed Aug 21 05:18:19 CEST 2013</I>
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<PRE>This is exactly the sort of thing gen_event is for. I would make each
server process register a handler at startup using
gen_event:add_sup_handler() and then have the handle_event callback simply
relay the event to the server processes. Yes, gproc can do this, but why
incur its extra features and overhead?
On Sat, Aug 17, 2013 at 3:10 AM, Loïc Hoguin <<A HREF="https://lists.ninenines.eu/listinfo/extend">essen at ninenines.eu</A>> wrote:
><i> On 08/17/2013 10:00 AM, Bin Wang wrote:
</I>><i>
</I>>><i> Hi,
</I>>><i>
</I>>><i> I'm new to ranch. In my application, I need to send some message to
</I>>><i> all connections. So I'd like to know can I get all connections from
</I>>><i> ranch, so I could use Transport:send to send them, or I must manage
</I>>><i> all the created connections by myself? Or is there any other better
</I>>><i> way?
</I>>><i>
</I>><i>
</I>><i> The best way to do that is on your end, using gproc properties. When the
</I>><i> connection is accepted, register the process with the property and use the
</I>><i> property to send messages to all processes. You don't need to unregister
</I>><i> when the connection ends, gproc does that automatically.
</I>><i>
</I>><i> The hackish way to do that would be to call supervisor:which_children on
</I>><i> the ranch_conns_sup supervisor of your listener, but that will slow down
</I>><i> the accepting of new connections, so don't do this if you need high accept
</I>><i> rates.
</I>><i>
</I>><i> --
</I>><i> Loïc Hoguin
</I>><i> Erlang Cowboy
</I>><i> Nine Nines
</I>><i> <A HREF="http://ninenines.eu">http://ninenines.eu</A>
</I>><i>
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