154 lines
4.3 KiB
Erlang
154 lines
4.3 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%% Created : 28 Mar 2017 by Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2017 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(ejabberd_router_redis).
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-behaviour(ejabberd_router).
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%% API
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-export([init/0, register_route/5, unregister_route/3, find_routes/1,
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host_of_route/1, is_my_route/1, is_my_host/1, get_all_routes/0,
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find_routes/0]).
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-include("ejabberd.hrl").
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-include("logger.hrl").
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-include("ejabberd_router.hrl").
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-define(ROUTES_KEY, "ejabberd:routes").
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%%%===================================================================
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%%% API
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%%%===================================================================
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init() ->
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clean_table().
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register_route(Domain, ServerHost, LocalHint, _, Pid) ->
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DomKey = domain_key(Domain),
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PidKey = term_to_binary(Pid),
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T = term_to_binary({ServerHost, LocalHint}),
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case ejabberd_redis:multi(
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fun() ->
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ejabberd_redis:hset(DomKey, PidKey, T),
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ejabberd_redis:sadd(?ROUTES_KEY, [Domain])
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end) of
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{ok, _} ->
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ok;
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Err ->
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?ERROR_MSG("failed to register route in redis: ~p", [Err]),
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Err
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end.
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unregister_route(Domain, _, Pid) ->
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DomKey = domain_key(Domain),
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PidKey = term_to_binary(Pid),
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try
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{ok, Num} = ejabberd_redis:hdel(DomKey, [PidKey]),
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if Num > 0 ->
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{ok, Len} = ejabberd_redis:hlen(DomKey),
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if Len == 0 ->
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{ok, _} = ejabberd_redis:multi(
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fun() ->
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ejabberd_redis:del([DomKey]),
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ejabberd_redis:srem(?ROUTES_KEY, [Domain])
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end),
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ok;
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true ->
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ok
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end;
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true ->
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ok
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end
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catch _:{badmatch, Err} ->
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?ERROR_MSG("failed to unregister route in redis: ~p", [Err]),
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Err
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end.
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find_routes(Domain) ->
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DomKey = domain_key(Domain),
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case ejabberd_redis:hgetall(DomKey) of
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{ok, Vals} ->
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decode_routes(Domain, Vals);
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Err ->
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?ERROR_MSG("failed to find routes in redis: ~p", [Err]),
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[]
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end.
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host_of_route(Domain) ->
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DomKey = domain_key(Domain),
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case ejabberd_redis:hgetall(DomKey) of
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{ok, [{_Pid, Data}|_]} ->
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{ServerHost, _} = binary_to_term(Data),
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{ok, ServerHost};
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{ok, []} ->
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error;
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Err ->
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?ERROR_MSG("failed to get host of route in redis: ~p", [Err]),
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error
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end.
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is_my_route(Domain) ->
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case ejabberd_redis:sismember(?ROUTES_KEY, Domain) of
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{ok, Bool} ->
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Bool;
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Err ->
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?ERROR_MSG("failed to check route in redis: ~p", [Err]),
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false
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end.
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is_my_host(Domain) ->
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{ok, Domain} == host_of_route(Domain).
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get_all_routes() ->
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case ejabberd_redis:smembers(?ROUTES_KEY) of
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{ok, Routes} ->
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Routes;
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Err ->
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?ERROR_MSG("failed to fetch routes from redis: ~p", [Err]),
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[]
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end.
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find_routes() ->
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lists:flatmap(fun find_routes/1, get_all_routes()).
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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clean_table() ->
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lists:foreach(
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fun(#route{domain = Domain, pid = Pid}) when node(Pid) == node() ->
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unregister_route(Domain, undefined, Pid);
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(_) ->
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ok
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end, find_routes()).
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domain_key(Domain) ->
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<<"ejabberd:route:", Domain/binary>>.
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decode_routes(Domain, Vals) ->
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lists:map(
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fun({Pid, Data}) ->
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{ServerHost, LocalHint} = binary_to_term(Data),
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#route{domain = Domain,
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pid = binary_to_term(Pid),
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server_host = ServerHost,
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local_hint = LocalHint}
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end, Vals).
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