91 lines
3.0 KiB
Erlang
91 lines
3.0 KiB
Erlang
%%%-----------------------------------------------------------------------------
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%%% @Copyright (C) 2012-2015, Feng Lee <feng@emqtt.io>
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%%%
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%%% Permission is hereby granted, free of charge, to any person obtaining a copy
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%%% of this software and associated documentation files (the "Software"), to deal
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%%% in the Software without restriction, including without limitation the rights
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%%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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%%% copies of the Software, and to permit persons to whom the Software is
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%%% furnished to do so, subject to the following conditions:
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%%%
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%%% The above copyright notice and this permission notice shall be included in all
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%%% copies or substantial portions of the Software.
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%%%
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%%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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%%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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%%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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%%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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%%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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%%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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%%% SOFTWARE.
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%%%-----------------------------------------------------------------------------
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%%% @doc
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%%% emqttd pooler.
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%%%
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%%% @end
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%%%-----------------------------------------------------------------------------
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-module(emqttd_pooler).
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-author('feng@emqtt.io').
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-behaviour(gen_server).
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%% API Exports
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-export([start_link/1, submit/1, async_submit/1]).
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%% gen_server Function Exports
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-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
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terminate/2, code_change/3]).
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-record(state, {id}).
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%%%=============================================================================
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%%% API
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%%%=============================================================================
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-spec start_link(I :: pos_integer()) -> {ok, pid()} | ignore | {error, any()}.
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start_link(I) ->
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gen_server:start_link(?MODULE, [I], []).
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submit(Fun) ->
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gen_server:call(gproc_pool:pick(pooler), {submit, Fun}, infinity).
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async_submit(Fun) ->
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gen_server:cast(gproc_pool:pick(pooler), {async_submit, Fun}).
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init([I]) ->
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gproc_pool:connect_worker(pooler, {pooler, I}),
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{ok, #state{id = I}}.
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handle_call({submit, Fun}, _From, State) ->
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{reply, run(Fun), State};
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handle_call(_Req, _From, State) ->
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{reply, ok, State}.
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handle_cast({async_submit, Fun}, State) ->
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run(Fun),
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{noreply, State};
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handle_cast(_Msg, State) ->
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{noreply, State}.
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handle_info(_Info, State) ->
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{noreply, State}.
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terminate(_Reason, #state{id = I}) ->
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gproc_pool:disconnect_worker(pooler, {pooler, I}), ok.
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code_change(_OldVsn, State, _Extra) ->
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{ok, State}.
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%%%=============================================================================
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%%% Internal functions
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%%%=============================================================================
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run({M, F, A}) ->
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erlang:apply(M, F, A);
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run(Fun) when is_function(Fun) ->
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Fun().
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