mirror of
https://github.com/processone/ejabberd.git
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251 lines
7.0 KiB
Erlang
251 lines
7.0 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_app.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : ejabberd's application callback module
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%%% Created : 31 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2015 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_app).
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-author('alexey@process-one.net').
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-behaviour(application).
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-export([start_modules/0,start/2, prep_stop/1, stop/1, init/0]).
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-include("ejabberd.hrl").
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-include("logger.hrl").
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%%%
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%%% Application API
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%%%
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start(normal, _Args) ->
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ejabberd_logger:start(),
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write_pid_file(),
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start_apps(),
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ejabberd:check_app(ejabberd),
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randoms:start(),
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db_init(),
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start(),
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translate:start(),
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ejabberd_ctl:init(),
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ejabberd_commands:init(),
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ejabberd_admin:start(),
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gen_mod:start(),
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ejabberd_config:start(),
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set_loglevel_from_config(),
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acl:start(),
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shaper:start(),
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connect_nodes(),
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Sup = ejabberd_sup:start_link(),
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ejabberd_rdbms:start(),
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ejabberd_riak_sup:start(),
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ejabberd_sm:start(),
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ejabberd_auth:start(),
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cyrsasl:start(),
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% Profiling
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%ejabberd_debug:eprof_start(),
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%ejabberd_debug:fprof_start(),
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maybe_add_nameservers(),
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ext_mod:start(),
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start_modules(),
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ejabberd_listener:start_listeners(),
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?INFO_MSG("ejabberd ~s is started in the node ~p", [?VERSION, node()]),
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Sup;
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start(_, _) ->
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{error, badarg}.
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%% Prepare the application for termination.
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%% This function is called when an application is about to be stopped,
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%% before shutting down the processes of the application.
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prep_stop(State) ->
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ejabberd_listener:stop_listeners(),
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stop_modules(),
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ejabberd_admin:stop(),
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broadcast_c2s_shutdown(),
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timer:sleep(5000),
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State.
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%% All the processes were killed when this function is called
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stop(_State) ->
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?INFO_MSG("ejabberd ~s is stopped in the node ~p", [?VERSION, node()]),
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delete_pid_file(),
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%%ejabberd_debug:stop(),
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ok.
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%%%
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%%% Internal functions
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%%%
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start() ->
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spawn_link(?MODULE, init, []).
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init() ->
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register(ejabberd, self()),
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loop().
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loop() ->
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receive
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_ ->
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loop()
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end.
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db_init() ->
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ejabberd_config:env_binary_to_list(mnesia, dir),
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MyNode = node(),
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DbNodes = mnesia:system_info(db_nodes),
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case lists:member(MyNode, DbNodes) of
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true ->
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ok;
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false ->
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?CRITICAL_MSG("Node name mismatch: I'm [~s], "
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"the database is owned by ~p", [MyNode, DbNodes]),
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?CRITICAL_MSG("Either set ERLANG_NODE in ejabberdctl.cfg "
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"or change node name in Mnesia", []),
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erlang:error(node_name_mismatch)
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end,
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case mnesia:system_info(extra_db_nodes) of
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[] ->
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mnesia:create_schema([node()]);
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_ ->
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ok
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end,
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ejabberd:start_app(mnesia, permanent),
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mnesia:wait_for_tables(mnesia:system_info(local_tables), infinity).
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%% Start all the modules in all the hosts
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start_modules() ->
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lists:foreach(
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fun(Host) ->
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Modules = ejabberd_config:get_option(
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{modules, Host},
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fun(Mods) ->
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lists:map(
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fun({M, A}) when is_atom(M), is_list(A) ->
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{M, A}
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end, Mods)
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end, []),
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lists:foreach(
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fun({Module, Args}) ->
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gen_mod:start_module(Host, Module, Args)
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end, Modules)
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end, ?MYHOSTS).
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%% Stop all the modules in all the hosts
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stop_modules() ->
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lists:foreach(
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fun(Host) ->
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Modules = ejabberd_config:get_option(
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{modules, Host},
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fun(Mods) ->
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lists:map(
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fun({M, A}) when is_atom(M), is_list(A) ->
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{M, A}
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end, Mods)
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end, []),
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lists:foreach(
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fun({Module, _Args}) ->
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gen_mod:stop_module_keep_config(Host, Module)
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end, Modules)
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end, ?MYHOSTS).
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connect_nodes() ->
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Nodes = ejabberd_config:get_option(
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cluster_nodes,
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fun(Ns) ->
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true = lists:all(fun is_atom/1, Ns),
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Ns
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end, []),
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lists:foreach(fun(Node) ->
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net_kernel:connect_node(Node)
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end, Nodes).
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%% If ejabberd is running on some Windows machine, get nameservers and add to Erlang
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maybe_add_nameservers() ->
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case os:type() of
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{win32, _} -> add_windows_nameservers();
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_ -> ok
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end.
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add_windows_nameservers() ->
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IPTs = win32_dns:get_nameservers(),
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?INFO_MSG("Adding machine's DNS IPs to Erlang system:~n~p", [IPTs]),
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lists:foreach(fun(IPT) -> inet_db:add_ns(IPT) end, IPTs).
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broadcast_c2s_shutdown() ->
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Children = ejabberd_sm:get_all_pids(),
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lists:foreach(
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fun(C2SPid) when node(C2SPid) == node() ->
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C2SPid ! system_shutdown;
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(_) ->
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ok
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end, Children).
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%%%
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%%% PID file
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%%%
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write_pid_file() ->
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case ejabberd:get_pid_file() of
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false ->
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ok;
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PidFilename ->
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write_pid_file(os:getpid(), PidFilename)
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end.
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write_pid_file(Pid, PidFilename) ->
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case file:open(PidFilename, [write]) of
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{ok, Fd} ->
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io:format(Fd, "~s~n", [Pid]),
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file:close(Fd);
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{error, Reason} ->
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?ERROR_MSG("Cannot write PID file ~s~nReason: ~p", [PidFilename, Reason]),
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throw({cannot_write_pid_file, PidFilename, Reason})
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end.
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delete_pid_file() ->
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case ejabberd:get_pid_file() of
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false ->
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ok;
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PidFilename ->
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file:delete(PidFilename)
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end.
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set_loglevel_from_config() ->
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Level = ejabberd_config:get_option(
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loglevel,
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fun(P) when P>=0, P=<5 -> P end,
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4),
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ejabberd_logger:set(Level).
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start_apps() ->
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crypto:start(),
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ejabberd:start_app(sasl),
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ejabberd:start_app(ssl),
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ejabberd:start_app(p1_yaml),
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ejabberd:start_app(p1_tls),
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ejabberd:start_app(p1_xml),
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ejabberd:start_app(p1_stringprep),
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ejabberd:start_app(p1_zlib),
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ejabberd:start_app(p1_cache_tab).
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