[erlang-patches] new patch: Add plugin support for alternative name lookup

Ahmed Omar <>
Mon Jan 17 21:17:22 CET 2011


+1 for that, i see it not only as a good option but a good practice to
standardize a common problem i have seen before being solved in different
ways

On Mon, Jan 17, 2011 at 4:12 PM, Ulf Wiger
<>wrote:

>
> git fetch git://github.com/uwiger/otp.git uw_extending_gen
>
> Note that I've not updated documentation. If people don't
> like the idea, I won't waste my time doing so, but otherwise, I
> will follow up with documentation changes as well.
>
> BR,
> Ulf
>
>
> commit 22453671179dadf7204675438cf36edde137f945
> Author: Ulf Wiger <>
> Date:   Mon Jan 17 15:47:00 2011 +0100
>
>    Add plugin support for alternative name lookup
>
>    OTP behaviour instances (gen_server, gen_fsm, gen_event) can currently
>    register themselves either locally or globally, and the behaviour
>    libraries (including gen.erl) support both addressing methods, as well
>    as the normal Pid and {Name, Node}.
>
>    However, there are alternative registry implementations - e.g. gproc -
>    and one can well imagine other ways of locating a behaviour instance,
>    e.g. on a node connected only via a TCP tunnel, rather than via
>    Distributed Erlang. In all these cases, one needs to write extra code
>    to identify the behaviour instance, even though the instance itself
>    need not be aware of how it is located.
>
>    This patch introduces a new way of locating a behaviour instance:
>    {via, Module, Name}.
>
>    Module is expected to export a subset of the functions in global.erl,
>    namely:
>
>    register_name(Name, Pid) -> yes | no
>    whereis_name(Name)  -> pid() | undefined
>    unregister_name(Name) -> ok
>    send(Name, Msg) -> Pid
>
>    Semantics are expected to be the same as for global.erl
>
>    This can be used in all places where {global, Name} is accepted.
>
>    In this patch, the test suites gen_server_SUITE, gen_fsm_SUITE and
>    gen_event_SUITE have been extended, but documentation has not been
>    updated. This will be done if there is agreement that the idea is
>    good.
>
>
> Ulf Wiger, CTO, Erlang Solutions, Ltd.
> http://erlang-solutions.com
>
>
>
>
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-- 
Best Regards,
- Ahmed Omar
http://nl.linkedin.com/in/adiaa
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