[erlang-questions] conditional pub-sub in gproc

Loïc Hoguin <>
Sun Jul 1 15:31:51 CEST 2012


I've been using wide_await in production for a few days now. It works 
great. Thanks again!

On 06/16/2012 02:58 AM, Ulf Wiger wrote:
>
> Good points.
>
> Please try out the latest version, which includes a few new functions:
>
> gproc:await(Node, Key, Timeout)
> https://github.com/esl/gproc/blob/master/doc/gproc.md#await-3
>
> gproc:wide_await(Nodes, Key, Timeout)
> https://github.com/esl/gproc/blob/master/doc/gproc.md#wide_await3
>
> gproc:nb_wait(Node, Key)
> https://github.com/esl/gproc/blob/master/doc/gproc.md#nb_wait-2
>
> gproc:cancel_wait(Node, Key, Ref)
> https://github.com/esl/gproc/blob/master/doc/gproc.md#cancel_wait-3
>
>
> Note that await/3 also returns the Value, so can be throught of as a
> distributed get_value() function.
>
> BR,
> Ulf W
>
>
> On 15 Jun 2012, at 16:25, Loïc Hoguin wrote:
>
>> Sorry I should have been clearer.
>>
>> I'm using global gproc to locate processes that may be on any node of the cluster. But sometimes I run into gen_leader's issues (for example if a node crashes) so I was wondering if I could manage still using gproc for my purposes without gen_leader.
>>
>> Currently it's easy to broadcast information to other local gprocs but not so much to retrieve remote data, similar to what get_value/2 or where/1 would do in a distributed context.
>>
>> It would be nice to be able to have a cluster of local gprocs and easily access them from any remote node, similar to how bcast works for broadcasting.
>>
>> On 06/16/2012 01:18 AM, Ulf Wiger wrote:
>>>
>>> On 15 Jun 2012, at 16:10, Loïc Hoguin wrote:
>>>
>>>> That removes some functionality though, doesn't it. Like :get_value/1 and where/1. How would you suggest using these without global gproc?
>>>
>>> Uhm, those functions work perfectly fine in a local context…
>>>
>>> Can you expand on that?
>>>
>>> Global gproc (gproc_dist) is disabled by default.
>>> My assumption is that most people leave it that way.
>>>
>>> BR,
>>> Ulf W
>>>
>>> Ulf Wiger, Co-founder & Developer Advocate, Feuerlabs Inc.
>>> http://feuerlabs.com
>>>
>>>
>>>
>>
>>
>> --
>> Loïc Hoguin
>> Erlang Cowboy
>> Nine Nines
>>
>>
>
> Ulf Wiger, Co-founder & Developer Advocate, Feuerlabs Inc.
> http://feuerlabs.com
>
>
>


-- 
Loïc Hoguin
Erlang Cowboy
Nine Nines
http://ninenines.eu





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