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erldns

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Erlang Authoritative DNS Server

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erldns src erldns_app.erl
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src/erldns_app.erl 

%% Copyright (c) 2012-2020, DNSimple Corporation

%%

%% Permission to use, copy, modify, and/or distribute this software for any

%% purpose with or without fee is hereby granted, provided that the above

%% copyright notice and this permission notice appear in all copies.

%%

%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.



%% @doc The erldns OTP application.

-module(erldns_app).



-include_lib("kernel/include/logger.hrl").



-behaviour(application).



% Application hooks

-export([

    start/2,

    start_phase/3,

    stop/1

]).



start(_Type, _Args) ->

    ?LOG_INFO("Starting erldns application"),

    nodefinder:multicast_start(),

    Ret = erldns_sup:start_link(),

    erldns_admin:maybe_start(),

    Ret.



start_phase(post_start, _StartType, _PhaseArgs) ->

    case application:get_env(erldns, custom_zone_parsers) of

        {ok, Parsers} ->

            erldns_zone_parser:register_parsers(Parsers);

        _ ->

            ok

    end,



    case application:get_env(erldns, custom_zone_encoders) of

        {ok, Encoders} ->

            erldns_zone_encoder:register_encoders(Encoders);

        _ ->

            ok

    end,



    ?LOG_INFO("Loading zones from local file"),

    erldns_zone_loader:load_zones(),



    % Start up the UDP and TCP servers

    ?LOG_INFO("Starting the UDP and TCP supervisor"),

    supervisor:start_child(

        erldns_sup,

        #{

            id => erldns_server_sup,

            start => {erldns_server_sup, start_link, []},

            restart => permanent,

            shutdown => infinity,

            type => supervisor

        }

    ),



    ok.



stop(_State) ->

    ?LOG_INFO("Stop erldns application"),

    ok.