%%%----------------------------------------------------------------------
%%% File : ejabberd_app.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : ejabberd's application callback module
%%% Created : 31 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2015 ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License along
%%% with this program; if not, write to the Free Software Foundation, Inc.,
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
%%%
%%%----------------------------------------------------------------------
-module(ejabberd_app).
-behaviour(ejabberd_config).
-author('alexey@process-one.net').
-behaviour(application).
-export([start_modules/0, start/2, prep_stop/1, stop/1,
init/0, opt_type/1]).
-include("ejabberd.hrl").
-include("logger.hrl").
%%%
%%% Application API
%%%
start(normal, _Args) ->
ejabberd_logger:start(),
write_pid_file(),
start_apps(),
ejabberd:check_app(ejabberd),
randoms:start(),
db_init(),
start(),
translate:start(),
ejabberd_ctl:init(),
ejabberd_commands:init(),
ejabberd_admin:start(),
gen_mod:start(),
ejabberd_config:start(),
set_settings_from_config(),
acl:start(),
shaper:start(),
connect_nodes(),
Sup = ejabberd_sup:start_link(),
ejabberd_rdbms:start(),
ejabberd_riak_sup:start(),
ejabberd_sm:start(),
cyrsasl:start(),
% Profiling
%ejabberd_debug:eprof_start(),
%ejabberd_debug:fprof_start(),
maybe_add_nameservers(),
ext_mod:start(),
ejabberd_auth:start(),
start_modules(),
ejabberd_listener:start_listeners(),
?INFO_MSG("ejabberd ~s is started in the node ~p", [?VERSION, node()]),
Sup;
start(_, _) ->
{error, badarg}.
%% Prepare the application for termination.
%% This function is called when an application is about to be stopped,
%% before shutting down the processes of the application.
prep_stop(State) ->
ejabberd_listener:stop_listeners(),
stop_modules(),
ejabberd_admin:stop(),
broadcast_c2s_shutdown(),
timer:sleep(5000),
State.
%% All the processes were killed when this function is called
stop(_State) ->
?INFO_MSG("ejabberd ~s is stopped in the node ~p", [?VERSION, node()]),
delete_pid_file(),
%%ejabberd_debug:stop(),
ok.
%%%
%%% Internal functions
%%%
start() ->
spawn_link(?MODULE, init, []).
init() ->
register(ejabberd, self()),
loop().
loop() ->
receive
_ ->
loop()
end.
db_init() ->
ejabberd_config:env_binary_to_list(mnesia, dir),
MyNode = node(),
DbNodes = mnesia:system_info(db_nodes),
case lists:member(MyNode, DbNodes) of
true ->
ok;
false ->
?CRITICAL_MSG("Node name mismatch: I'm [~s], "
"the database is owned by ~p", [MyNode, DbNodes]),
?CRITICAL_MSG("Either set ERLANG_NODE in ejabberdctl.cfg "
"or change node name in Mnesia", []),
erlang:error(node_name_mismatch)
end,
case mnesia:system_info(extra_db_nodes) of
[] ->
mnesia:create_schema([node()]);
_ ->
ok
end,
ejabberd:start_app(mnesia, permanent),
mnesia:wait_for_tables(mnesia:system_info(local_tables), infinity).
%% Start all the modules in all the hosts
start_modules() ->
lists:foreach(
fun(Host) ->
Modules = ejabberd_config:get_option(
{modules, Host},
fun(Mods) ->
lists:map(
fun({M, A}) when is_atom(M), is_list(A) ->
{M, A}
end, Mods)
end, []),
lists:foreach(
fun({Module, Args}) ->
gen_mod:start_module(Host, Module, Args)
end, Modules)
end, ?MYHOSTS).
%% Stop all the modules in all the hosts
stop_modules() ->
lists:foreach(
fun(Host) ->
Modules = ejabberd_config:get_option(
{modules, Host},
fun(Mods) ->
lists:map(
fun({M, A}) when is_atom(M), is_list(A) ->
{M, A}
end, Mods)
end, []),
lists:foreach(
fun({Module, _Args}) ->
gen_mod:stop_module_keep_config(Host, Module)
end, Modules)
end, ?MYHOSTS).
connect_nodes() ->
Nodes = ejabberd_config:get_option(
cluster_nodes,
fun(Ns) ->
true = lists:all(fun is_atom/1, Ns),
Ns
end, []),
lists:foreach(fun(Node) ->
net_kernel:connect_node(Node)
end, Nodes).
%% If ejabberd is running on some Windows machine, get nameservers and add to Erlang
maybe_add_nameservers() ->
case os:type() of
{win32, _} -> add_windows_nameservers();
_ -> ok
end.
add_windows_nameservers() ->
IPTs = win32_dns:get_nameservers(),
?INFO_MSG("Adding machine's DNS IPs to Erlang system:~n~p", [IPTs]),
lists:foreach(fun(IPT) -> inet_db:add_ns(IPT) end, IPTs).
broadcast_c2s_shutdown() ->
Children = ejabberd_sm:get_all_pids(),
lists:foreach(
fun(C2SPid) when node(C2SPid) == node() ->
C2SPid ! system_shutdown;
(_) ->
ok
end, Children).
%%%
%%% PID file
%%%
write_pid_file() ->
case ejabberd:get_pid_file() of
false ->
ok;
PidFilename ->
write_pid_file(os:getpid(), PidFilename)
end.
write_pid_file(Pid, PidFilename) ->
case file:open(PidFilename, [write]) of
{ok, Fd} ->
io:format(Fd, "~s~n", [Pid]),
file:close(Fd);
{error, Reason} ->
?ERROR_MSG("Cannot write PID file ~s~nReason: ~p", [PidFilename, Reason]),
throw({cannot_write_pid_file, PidFilename, Reason})
end.
delete_pid_file() ->
case ejabberd:get_pid_file() of
false ->
ok;
PidFilename ->
file:delete(PidFilename)
end.
set_settings_from_config() ->
Level = ejabberd_config:get_option(
loglevel,
fun(P) when P>=0, P=<5 -> P end,
4),
ejabberd_logger:set(Level),
Ticktime = ejabberd_config:get_option(
net_ticktime,
opt_type(net_ticktime),
60),
net_kernel:set_net_ticktime(Ticktime).
start_apps() ->
crypto:start(),
ejabberd:start_app(sasl),
ejabberd:start_app(ssl),
ejabberd:start_app(p1_yaml),
ejabberd:start_app(p1_tls),
ejabberd:start_app(p1_xml),
ejabberd:start_app(p1_stringprep),
ejabberd:start_app(p1_zlib),
ejabberd:start_app(p1_cache_tab).
opt_type(net_ticktime) ->
fun (P) when is_integer(P), P > 0 -> P end;
opt_type(cluster_nodes) ->
fun (Ns) -> true = lists:all(fun is_atom/1, Ns), Ns end;
opt_type(loglevel) ->
fun (P) when P >= 0, P =< 5 -> P end;
opt_type(modules) ->
fun (Mods) ->
lists:map(fun ({M, A}) when is_atom(M), is_list(A) ->
{M, A}
end,
Mods)
end;
opt_type(_) -> [cluster_nodes, loglevel, modules, net_ticktime].
