[erlang-questions] Pass Name to Dynamic Supervisors

Christopher Wilson <>
Sat Sep 10 22:57:59 CEST 2011


Thanks, that's pretty close.  How, or more importantly, when do I register
the name.  Do I put this in the child worker/sup as part of the MFA used to
spawn it or can this be called by the parent once start_child has been
called?  Best practice is all I'm looking for.  Thanks again for pointing
this one out.

-Chris

On Fri, Sep 9, 2011 at 1:03 PM, Garrett Smith <> wrote:

> On Wed, Sep 7, 2011 at 9:09 PM, Christopher Wilson <>
> wrote:
> > Is there a way to pass a name/ID into the call to supervisor:start_child,
> > more specifically to init()?  I'd like to specify the name of the worker
> or
> > supervisor such that when I ran supervisor:which_children I could
> identify
> > what's what.
> > Also, I've tried [unsuccessfully] to dynamically create a child spec and
> add
> > pass that in.  Are there any decent examples out there on how to do this
> > outside of the man pages?
>
> Take a look at:
>
> https://github.com/esl/gproc
>
> I'm not sure if that's the canonical repository -- maybe Ulf can weigh in.
>
> It's tempting, but I find it's best not to mess with the vanilla
> supervisory facility and instead use gproc for getting a list of named
> processes. You can also use gproc to publish interesting process stats
> to consumers, thus avoiding costly and intrusive queries to the
> processes themselves.
>
> This paper:
>
> https://github.com/esl/gproc/blob/master/doc/erlang07-wiger.pdf?raw=true
>
> provides the background for gproc and is otherwise an excellent read!
>
> You'll have a slight learning curve with gproc, but it's an
> *indispensable* tool so well worth it.
>
> It needs to be in the core :)
>
> Garrett
>
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