mirror of
https://github.com/processone/ejabberd.git
synced 2024-10-11 15:08:56 +02:00
9373ad20ca
Also halt faster without relying on timeouts for buffers flushing
182 lines
5.7 KiB
Erlang
182 lines
5.7 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : ejabberd wrapper: start / stop
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%%% Created : 16 Nov 2002 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2018 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License along
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%%% with this program; if not, write to the Free Software Foundation, Inc.,
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%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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%%%
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%%%----------------------------------------------------------------------
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-module(ejabberd).
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-author('alexey@process-one.net').
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-compile({no_auto_import, [{halt, 0}]}).
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-protocol({xep, 4, '2.9'}).
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-protocol({xep, 86, '1.0'}).
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-protocol({xep, 106, '1.1'}).
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-protocol({xep, 170, '1.0'}).
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-protocol({xep, 205, '1.0'}).
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-protocol({xep, 212, '1.0'}).
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-protocol({xep, 216, '1.0'}).
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-protocol({xep, 243, '1.0'}).
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-protocol({xep, 270, '1.0'}).
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-export([start/0, stop/0, halt/0, start_app/1, start_app/2,
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get_pid_file/0, check_app/1, module_name/1]).
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-include("logger.hrl").
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start() ->
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%%ejabberd_cover:start(),
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application:start(ejabberd).
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stop() ->
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application:stop(ejabberd).
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%%ejabberd_cover:stop().
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halt() ->
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application:stop(lager),
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application:stop(sasl),
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erlang:halt(1, [{flush, true}]).
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%% @spec () -> false | string()
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get_pid_file() ->
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case os:getenv("EJABBERD_PID_PATH") of
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false ->
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false;
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"" ->
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false;
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Path ->
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Path
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end.
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start_app(App) ->
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start_app(App, temporary).
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start_app(App, Type) ->
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StartFlag = not is_loaded(),
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start_app(App, Type, StartFlag).
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check_app(App) ->
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StartFlag = not is_loaded(),
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spawn(fun() -> check_app_modules(App, StartFlag) end),
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ok.
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is_loaded() ->
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Apps = application:which_applications(),
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lists:keymember(ejabberd, 1, Apps).
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start_app(App, Type, StartFlag) when not is_list(App) ->
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start_app([App], Type, StartFlag);
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start_app([App|Apps], Type, StartFlag) ->
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case application:start(App,Type) of
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ok ->
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spawn(fun() -> check_app_modules(App, StartFlag) end),
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start_app(Apps, Type, StartFlag);
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{error, {already_started, _}} ->
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start_app(Apps, Type, StartFlag);
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{error, {not_started, DepApp}} ->
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case lists:member(DepApp, [App|Apps]) of
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true ->
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Reason = io_lib:format(
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"failed to start application '~p': "
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"circular dependency on '~p' detected",
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[App, DepApp]),
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exit_or_halt(Reason, StartFlag);
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false ->
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start_app([DepApp,App|Apps], Type, StartFlag)
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end;
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Err ->
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Reason = io_lib:format("failed to start application '~p': ~p",
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[App, Err]),
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exit_or_halt(Reason, StartFlag)
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end;
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start_app([], _Type, _StartFlag) ->
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ok.
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check_app_modules(App, StartFlag) ->
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sleep(5000),
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case application:get_key(App, modules) of
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{ok, Mods} ->
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lists:foreach(
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fun(Mod) ->
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case code:which(Mod) of
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non_existing ->
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File = get_module_file(App, Mod),
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Reason = io_lib:format(
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"couldn't find module ~s "
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"needed for application '~p'",
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[File, App]),
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exit_or_halt(Reason, StartFlag);
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_ ->
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sleep(10)
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end
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end, Mods);
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_ ->
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%% No modules? This is strange
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ok
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end.
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exit_or_halt(Reason, StartFlag) ->
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?CRITICAL_MSG(Reason, []),
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if StartFlag ->
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%% Wait for the critical message is written in the console/log
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halt();
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true ->
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erlang:error(application_start_failed)
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end.
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sleep(N) ->
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timer:sleep(randoms:uniform(N)).
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get_module_file(App, Mod) ->
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BaseName = atom_to_list(Mod),
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case code:lib_dir(App, ebin) of
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{error, _} ->
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BaseName;
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Dir ->
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filename:join([Dir, BaseName ++ ".beam"])
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end.
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module_name([Dir, _, <<H,_/binary>> | _] = Mod) when H >= 65, H =< 90 ->
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Module = str:join([elixir_name(M) || M<-tl(Mod)], <<>>),
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Prefix = case elixir_name(Dir) of
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<<"Ejabberd">> -> <<"Elixir.Ejabberd.">>;
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Lib -> <<"Elixir.Ejabberd.", Lib/binary, ".">>
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end,
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misc:binary_to_atom(<<Prefix/binary, Module/binary>>);
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module_name([<<"ejabberd">> | _] = Mod) ->
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Module = str:join([erlang_name(M) || M<-Mod], $_),
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misc:binary_to_atom(Module);
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module_name(Mod) when is_list(Mod) ->
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Module = str:join([erlang_name(M) || M<-tl(Mod)], $_),
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misc:binary_to_atom(Module).
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elixir_name(Atom) when is_atom(Atom) ->
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elixir_name(misc:atom_to_binary(Atom));
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elixir_name(<<H,T/binary>>) when H >= 65, H =< 90 ->
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<<H, T/binary>>;
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elixir_name(<<H,T/binary>>) ->
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<<(H-32), T/binary>>.
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erlang_name(Atom) when is_atom(Atom) ->
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misc:atom_to_binary(Atom);
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erlang_name(Bin) when is_binary(Bin) ->
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Bin.
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