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%%%-------------------------------------------------------------------
%%% File : eldap_pool.erl
%%% Author : Evgeniy Khramtsov <xram@jabber.ru>
%%% Purpose : LDAP connections pool
%%% Created : 12 Nov 2006 by Evgeniy Khramtsov <xram@jabber.ru>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2008 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(eldap_pool).
-author('xram@jabber.ru').
%% API
-export([
start_link/6,
bind/3,
search/2
]).
-include("ejabberd.hrl").
%%====================================================================
%% API
%%====================================================================
bind(PoolName, DN, Passwd) ->
do_request(PoolName, {bind, [DN, Passwd]}).
search(PoolName, Opts) ->
do_request(PoolName, {search, [Opts]}).
start_link(Name, Hosts, Backups, Port, Rootdn, Passwd) ->
PoolName = make_id(Name),
pg2:create(PoolName),
lists:foreach(fun(Host) ->
ID = erlang:ref_to_list(make_ref()),
case catch eldap:start_link(ID, [Host|Backups], Port, Rootdn, Passwd) of
{ok, Pid} ->
pg2:join(PoolName, Pid);
_ ->
error
end
end, Hosts).
%%====================================================================
%% Internal functions
%%====================================================================
do_request(Name, {F, Args}) ->
case pg2:get_closest_pid(make_id(Name)) of
Pid when is_pid(Pid) ->
case catch apply(eldap, F, [Pid | Args]) of
{'EXIT', Reason} ->
?ERROR_MSG("LDAP request failed: eldap:~p(~p)~nReason: ~p",
[F, Args, Reason]),
{error, Reason};
Reply ->
Reply
end;
Err ->
Err
end.
make_id(Name) ->
list_to_atom("eldap_pool_" ++ Name).
|
