104 lines
3.3 KiB
Erlang
104 lines
3.3 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% File : eldap_pool.erl
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%%% Author : Evgeniy Khramtsov <xram@jabber.ru>
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%%% Purpose : LDAP connections pool
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%%% Created : 12 Nov 2006 by Evgeniy Khramtsov <xram@jabber.ru>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2022 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(eldap_pool).
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-author('xram@jabber.ru').
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%% API
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-export([start_link/7, bind/3, search/2,
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modify_passwd/3]).
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-include("logger.hrl").
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-ifdef(USE_OLD_PG2).
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pg_create(PoolName) -> pg2:create(PoolName).
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pg_join(PoolName, Pid) -> pg2:join(PoolName, Pid).
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pg_get_closest_pid(Name) -> pg2:get_closest_pid(Name).
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-else.
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pg_create(_) -> pg:start_link().
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pg_join(PoolName, Pid) -> pg:join(PoolName, Pid).
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pg_get_closest_pid(Group) ->
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case pg:get_local_members(Group) of
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[] ->
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case pg:get_members(Group) of
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[] -> {error, {no_process, Group}};
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[Pid | _] -> Pid
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end;
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[Pid | _] -> Pid
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end.
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-endif.
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%%====================================================================
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%% API
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%%====================================================================
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bind(PoolName, DN, Passwd) ->
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do_request(PoolName, {bind, [DN, Passwd]}).
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search(PoolName, Opts) ->
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do_request(PoolName, {search, [Opts]}).
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modify_passwd(PoolName, DN, Passwd) ->
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do_request(PoolName, {modify_passwd, [DN, Passwd]}).
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start_link(Name, Hosts, Backups, Port, Rootdn, Passwd,
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Opts) ->
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PoolName = make_id(Name),
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pg_create(PoolName),
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lists:foreach(fun (Host) ->
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ID = list_to_binary(erlang:ref_to_list(make_ref())),
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case catch eldap:start_link(ID, [Host | Backups],
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Port, Rootdn, Passwd,
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Opts)
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of
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{ok, Pid} -> pg_join(PoolName, Pid);
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Err ->
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?ERROR_MSG("Err = ~p", [Err]),
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error
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end
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end,
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Hosts).
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%%====================================================================
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%% Internal functions
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%%====================================================================
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do_request(Name, {F, Args}) ->
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case pg_get_closest_pid(make_id(Name)) of
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Pid when is_pid(Pid) ->
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case catch apply(eldap, F, [Pid | Args]) of
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{'EXIT', {timeout, _}} ->
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?ERROR_MSG("LDAP request failed: timed out", []);
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{'EXIT', Reason} ->
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?ERROR_MSG("LDAP request failed: eldap:~p(~p)~nReason: ~p",
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[F, Args, Reason]),
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{error, Reason};
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Reply -> Reply
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end;
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Err -> Err
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end.
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make_id(Name) ->
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misc:binary_to_atom(<<"eldap_pool_", Name/binary>>).
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