[erlang-questions] Kill a process after T seconds

Harit Himanshu <>
Tue Jan 13 20:22:51 CET 2015


Thanks Jesper, this is my 13th Day with Erlang (Its new year resolution for
me to learn Erlang this year and make at least 1 project on concurrency :))

I will take a look at lager btw

Thank you again

On Tue, Jan 13, 2015 at 11:02 AM, Jesper Louis Andersen <
> wrote:

> Hi Harit,
>
> I don't think there is any way you could do that better, without knowing
> what semantics you are striving for in the first place. The code looks fine
> to me, and depending in which context it runs, it could be perfect or have
> a problem. It is really hard to tell without any more information.
>
> For a larger system, you may gain some by using either the 'lager'
> application (github.com/basho/lager) or the 'error_logger' to report
> progress. That way, you can later route logging messages in a favorable
> fashion.
>
> Another thing you could look into is to use 'proc_lib' to turn the
> framework you have built into an OTP-compliant framework. But that may be a
> bit out on the horizon, depending on how much time you have spent with
> Erlang to this date.
>
> On Tue Jan 13 2015 at 7:56:03 PM Harit Himanshu <
> > wrote:
>
>> The recent problem I worked on is
>>
>> Write a function my_spawn(Mod, Func, Args, Time) that behaves like
>> spawn(Mod, Func, Args) but with one difference. If the spawned process
>> lives for more than Time seconds, it should be killed.
>>
>> My attempt looks like
>>
>> my_spawn(Mod, Func, Args, Time) ->
>>   Pid = spawn(Mod, Func, Args),
>>   io:format("created new process: ~p.~n", [Pid]),
>>   timer:kill_after(Time * 1000),
>>   Pid.
>>
>> and when I run I see
>>
>> 1>  c(error_handling).
>>
>> {ok,error_handling}
>>
>> 2> Pid1 = error_handling:my_spawn(area_server0, loop, [], 30).
>>
>> created new process: <0.39.0>.
>>
>> <0.39.0>
>>
>> 3> Pid1 ! {self(), {square, 10}}.
>>
>> {<0.32.0>,{square,10}}
>>
>> 4> receive X->X end.
>>
>> 100
>>
>> 5> Pid1 ! {self(), {square, 20}}.
>>
>> {<0.32.0>,{square,20}}
>>
>> 6> receive Y->Y end.
>>
>> 400
>>
>> ** exception error: killed
>>
>> 7>
>>
>> Looking for suggestions on the code or ways to write it better
>>
>> Thanks
>>
>> _______________________________________________
>> erlang-questions mailing list
>> 
>> http://erlang.org/mailman/listinfo/erlang-questions
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://erlang.org/pipermail/erlang-questions/attachments/20150113/cf8a2e97/attachment.html>


More information about the erlang-questions mailing list