[erlang-questions] broadcast message to all gen_server

AD <>
Wed Apr 11 00:01:50 CEST 2012

the gen_server is part of the sockjs server and i was trying to not
modify/fork his code and leverage what is already there. Currently he uses
a handle_call() so was looking at handling it outside his code.


On Tue, Apr 10, 2012 at 4:18 PM, Tilman Holschuh

> On 12-04-10 12:37 PM, AD wrote:
>>  I have a situation where i am trying to handle a case where I am using
>> sockjs and need to send a message to each sockjs session_server (which is
>> a
>> gen_server).  I am using gproc() but I cant simply do a gproc_send() b/c
>> the message ends up in handle_info() instead of properly in handle_call().
>>  I have managed to work this out, when receiving a message from rabbitmq i
>> do a gproc:lookup_pids() and then loop through each pid and do a
>> gen_server:call(PID,Message).  The issue is this is a linear process, is
>> there a way to handle sending gen_server:call() to all the processes
>> concurrently ?
> Do you need a response from the gen_server:call? If not you could just use
> a cast instead. Something like:
> [gen_server:cast(Pid, Message) || Pid <- gproc:lookup_pids()]
> Cheers
> - Tilman
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