%%%----------------------------------------------------------------------
%%% File : ejabberd_rdbms.erl
%%% Author : Mickael Remond <mickael.remond@process-one.net>
%%% Purpose : Manage the start of the database modules when needed
%%% Created : 31 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2013 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., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------
-module(ejabberd_rdbms).
-author('alexey@process-one.net').
-export([start/0]).
-include("ejabberd.hrl").
-include("logger.hrl").
start() ->
case lists:any(fun(H) -> needs_odbc(H) /= false end,
?MYHOSTS) of
true ->
start_hosts();
false ->
ok
end.
%% Start relationnal DB module on the nodes where it is needed
start_hosts() ->
lists:foreach(fun (Host) ->
case needs_odbc(Host) of
{true, App} -> start_odbc(Host, App);
false -> ok
end
end,
?MYHOSTS).
%% Start the ODBC module on the given host
start_odbc(Host, App) ->
ejabberd:start_app(App),
Supervisor_name = gen_mod:get_module_proc(Host,
ejabberd_odbc_sup),
ChildSpec = {Supervisor_name,
{ejabberd_odbc_sup, start_link, [Host]}, transient,
infinity, supervisor, [ejabberd_odbc_sup]},
case supervisor:start_child(ejabberd_sup, ChildSpec) of
{ok, _PID} -> ok;
_Error ->
?ERROR_MSG("Start of supervisor ~p failed:~n~p~nRetrying."
"..~n",
[Supervisor_name, _Error]),
start_odbc(Host, App)
end.
%% Returns {true, App} if we have configured odbc for the given host
needs_odbc(Host) ->
LHost = jlib:nameprep(Host),
case ejabberd_config:get_option({odbc_type, LHost},
fun(mysql) -> mysql;
(pgsql) -> pgsql;
(odbc) -> odbc
end, undefined) of
mysql -> {true, p1_mysql};
pgsql -> {true, p1_pgsql};
odbc -> {true, odbc};
undefined -> false
end.
