70 lines
2.2 KiB
Erlang
70 lines
2.2 KiB
Erlang
%%--------------------------------------------------------------------
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%% Copyright (c) 2012-2016 Feng Lee <feng@emqtt.io>.
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%%
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%% Licensed under the Apache License, Version 2.0 (the "License");
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%% you may not use this file except in compliance with the License.
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%% You may obtain a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing, software
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%% distributed under the License is distributed on an "AS IS" BASIS,
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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%% See the License for the specific language governing permissions and
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%% limitations under the License.
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%%--------------------------------------------------------------------
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%% @doc Common Pool Supervisor
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-module(emqttd_pool_sup).
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-behaviour(supervisor).
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%% API
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-export([spec/1, spec/2, start_link/3, start_link/4]).
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%% Supervisor callbacks
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-export([init/1]).
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-spec(spec(list()) -> supervisor:child_spec()).
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spec(Args) ->
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spec(pool_sup, Args).
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-spec(spec(any(), list()) -> supervisor:child_spec()).
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spec(ChildId, Args) ->
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{ChildId, {?MODULE, start_link, Args},
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transient, infinity, supervisor, [?MODULE]}.
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-spec(start_link(atom(), atom(), mfa()) -> {ok, pid()} | {error, any()}).
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start_link(Pool, Type, MFA) ->
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Schedulers = erlang:system_info(schedulers),
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start_link(Pool, Type, Schedulers, MFA).
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-spec(start_link(atom(), atom(), pos_integer(), mfa()) -> {ok, pid()} | {error, any()}).
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start_link(Pool, Type, Size, MFA) ->
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supervisor:start_link(?MODULE, [Pool, Type, Size, MFA]).
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%% sup_name(Pool) when is_atom(Pool) ->
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%% list_to_atom(atom_to_list(Pool) ++ "_pool_sup").
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init([Pool, Type, Size, {M, F, Args}]) ->
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ensure_pool(Pool, Type, [{size, Size}]),
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{ok, {{one_for_one, 10, 3600}, [
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begin
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ensure_pool_worker(Pool, {Pool, I}, I),
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{{M, I}, {M, F, [Pool, I | Args]},
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transient, 5000, worker, [M]}
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end || I <- lists:seq(1, Size)]}}.
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ensure_pool(Pool, Type, Opts) ->
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try gproc_pool:new(Pool, Type, Opts)
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catch
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error:exists -> ok
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end.
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ensure_pool_worker(Pool, Name, Slot) ->
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try gproc_pool:add_worker(Pool, Name, Slot)
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catch
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error:exists -> ok
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end.
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