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< Erlang ~ Concurrency and OTP |
| bnagle |
 Posted: Mon Mar 14, 2011 6:59 pm |
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Joined: 14 Mar 2011
Posts: 1
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Hi,
I am relatively new to erlang; I have successfully used it for two projects, and am now working on a third. I am attempting to learn OTP and best practices on how to use it. I have been reading the "Erlang and OTP in Action" book, and it has been helping immensely. However, there are a few things I am still confused on.
Currently, I am attempting to build an OTP application that can accept standard erlang messages with data, and then run processing functions on that data. Because the processing functions may take awhile to finish, I do not want the OTP application to block while the processing is running.
The obvious solution to this, is to start a new process for every incoming message. Can anyone point me in the right direction on this? I am assuming that just calling spawn inside call or cast is not the right way of doing it?
Currently, I have a simple OTP application with a supervisor and a gen_server; I am using simple_one_for_one. The application works as expected; a new child is not being started for each connection, and as a result, subsequent calls to the gen_server have to wait for previous ones to finish.
What is the best way to spawn the children in this situation? Also, how can you send new messages only to the most recently created gen_server? hd(supervisor:which_children)?
Thanks |
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| Mazen |
| Posted: Tue Mar 15, 2011 8:14 am |
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Joined: 20 Jul 2006
Posts: 164
Location: London
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Spawn a new process in handle_call and send the "From" argument along with it then return noreply in your handle call, when your process is done have it call gen_server:reply
trap exits in your gen_server and prepare to catch exit signals from the processes you spawned. |
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| dongdongwu |
| Posted: Thu Sep 20, 2012 6:07 am |
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Joined: 19 Sep 2012
Posts: 236
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