[erlang-questions] Noob question: Need some help to limit process spawing

[avinash D'silva]

Sorry, it was just a typo.
The original question holds.

I was considering using a *Semaphore* to block the spawning of a new
proccess with the help of  ETS, but I fear performance issues.

Code with Fixed Typo:

 timer:apply_after(5*1000,mymodule,myfunction,[Value]),
 timer:apply_after(5*1000,mymodule,myfunction,[Value]),
 timer:apply_after(5*1000,mymodule,myfunction,[Value]),
 timer:apply_after(5*1000,mymodule,myfunction,[Value]),
 timer:apply_after(5*1000,mymodule,myfunction,[Value]),

"myfunction" looks like this:
myfunction(Value)->

Val2=iolist_to_binary([Value,"_P"]),

case pg2:get_members(Val2) of

        [] ->
            {ok,P}=mymodule:start_link(),
            pg2:join(Val2,P2),
            gen_server:call(P2,{push,Msg});
        Otherwise ->
            [Px|_]=Otherwise,
            gen_server:call(Px,{push,Msg})
      end,



On Sun, Aug 16, 2015 at 7:07 PM, Edward Halls <ehalls@REDACTED> wrote:

> Perhaps some better syntax highlighting can help you spot this in the
> future.
>
> A good ide will also tell you when there are unused variables.
> On 16 Aug 2015 2:22 pm, "Robert Raschke" <rtrlists@REDACTED> wrote:
>
>> Could be the typo? Value2 vs Val2.
>> On Aug 16, 2015 12:44 PM, "avinash D'silva" <evnix.com@REDACTED> wrote:
>>
>>> Hi,
>>>
>>> I have these lines code:
>>>
>>>  timer:apply_after(5*1000,mymodule,myfunction,[Value]),
>>>  timer:apply_after(5*1000,mymodule,myfunction,[Value]),
>>>  timer:apply_after(5*1000,mymodule,myfunction,[Value]),
>>>  timer:apply_after(5*1000,mymodule,myfunction,[Value]),
>>>  timer:apply_after(5*1000,mymodule,myfunction,[Value]),
>>>
>>> "myfunction" looks like this:
>>> myfunction(Value)->
>>>
>>> Val2=iolist_to_binary([Value,"_P"]),
>>>
>>> case pg2:get_members(Value2) of
>>>
>>>         [] ->
>>>             {ok,P}=mymodule:start_link(),
>>>             pg2:join(Value2,P2),
>>>             gen_server:call(P2,{push,Msg});
>>>         Otherwise ->
>>>             [Px|_]=Otherwise,
>>>             gen_server:call(Px,{push,Msg})
>>>       end,
>>>
>>> the problem is instead of creating a single process of mymodule.
>>> there are 5 processes, as time taken to register the process is more,
>>>
>>> Any solution to this problem?
>>>
>>>
>>> Regards,
>>> Avinash D' Silva
>>>
>>> _______________________________________________
>>> erlang-questions mailing list
>>> erlang-questions@REDACTED
>>> http://erlang.org/mailman/listinfo/erlang-questions
>>>
>>>
>> _______________________________________________
>> erlang-questions mailing list
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>>


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