%%%----------------------------------------------------------------------
%%% 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) 2002-2016 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_rdbms).
-behaviour(ejabberd_config).
-author('alexey@process-one.net').
-export([start/0, opt_type/1]).
-include("ejabberd.hrl").
-include("logger.hrl").
start() ->
file:delete(ejabberd_sql:freetds_config()),
file:delete(ejabberd_sql:odbc_config()),
file:delete(ejabberd_sql:odbcinst_config()),
case lists:any(fun(H) -> needs_sql(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_sql(Host) of
{true, App} -> start_sql(Host, App);
false -> ok
end
end,
?MYHOSTS).
%% Start the SQL module on the given host
start_sql(Host, App) ->
ejabberd:start_app(App),
Supervisor_name = gen_mod:get_module_proc(Host,
ejabberd_sql_sup),
ChildSpec = {Supervisor_name,
{ejabberd_sql_sup, start_link, [Host]}, transient,
infinity, supervisor, [ejabberd_sql_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_sql(Host, App)
end.
%% Returns {true, App} if we have configured sql for the given host
needs_sql(Host) ->
LHost = jid:nameprep(Host),
case ejabberd_config:get_option({sql_type, LHost},
fun(mysql) -> mysql;
(pgsql) -> pgsql;
(sqlite) -> sqlite;
(mssql) -> mssql;
(odbc) -> odbc
end, undefined) of
mysql -> {true, p1_mysql};
pgsql -> {true, p1_pgsql};
sqlite -> {true, sqlite3};
mssql -> {true, odbc};
odbc -> {true, odbc};
undefined -> false
end.
opt_type(sql_type) ->
fun (mysql) -> mysql;
(pgsql) -> pgsql;
(sqlite) -> sqlite;
(mssql) -> mssql;
(odbc) -> odbc
end;
opt_type(_) -> [sql_type].
