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%%% Textgroup server. |
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%%% |
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%%% Copyright (c) 2022, 2023 Holger Weiss <holger@zedat.fu-berlin.de>. |
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%%% All rights reserved. |
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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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-module(textgroup_acceptor_sup). |
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-behaviour(supervisor). |
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-export([start_link/0, |
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init/1]). |
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-include_lib("kernel/include/logger.hrl"). |
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-define(SERVER, ?MODULE). |
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-define(SEND_TIMEOUT, timer:seconds(15)). |
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%% API. |
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-spec start_link() -> {ok, pid()} | {error, term()}. |
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start_link() -> |
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?LOG_DEBUG("Starting acceptor supervisor"), |
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supervisor:start_link({local, ?SERVER}, ?MODULE, []). |
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-spec init([]) -> {ok, {supervisor:sup_flags(), [supervisor:child_spec()]}}. |
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init([]) -> |
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?LOG_DEBUG("Initializing acceptor supervisor"), |
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{ok, Port} = application:get_env(port), |
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{ok, PoolSize} = application:get_env(pool_size), |
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Listener = start_listener(Port), |
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SupFlags = #{}, |
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ChildSpecs = |
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lists:map( |
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fun(N) -> |
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#{id => {textgroup_acceptor, N}, |
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start => {textgroup_acceptor, start_link, [Listener]}} |
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end, lists:seq(1, PoolSize)), |
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{ok, {SupFlags, ChildSpecs}}. |
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%% Internal functions. |
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-spec start_listener(inet:port_number()) -> inet:socket(). |
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start_listener(Port) -> |
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?LOG_DEBUG("Starting listener on port ~B", [Port]), |
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{ok, Listener} = gen_tcp:listen(Port, [binary, |
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{reuseaddr, true}, |
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{nodelay, true}, |
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{active, false}, |
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{packet, line}, |
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{send_timeout, ?SEND_TIMEOUT}, |
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{send_timeout_close, true}]), |
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Listener. |