mirror of
https://github.com/processone/ejabberd.git
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112 lines
3.5 KiB
Erlang
112 lines
3.5 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%% Created : 15 Apr 2017 by Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2018 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(mod_proxy65_riak).
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-behaviour(mod_proxy65).
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%% API
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-export([init/0, register_stream/2, unregister_stream/1, activate_stream/4]).
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-include("logger.hrl").
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-record(proxy65, {sid :: binary(),
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pid_t :: pid(),
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pid_i :: pid() | undefined,
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jid_i :: binary() | undefined}).
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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_stream(SID, Pid) ->
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case ejabberd_riak:get(proxy65, proxy65_schema(), SID) of
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{error, notfound} ->
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ejabberd_riak:put(#proxy65{sid = SID, pid_t = Pid},
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proxy65_schema());
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{ok, #proxy65{pid_i = undefined} = R} ->
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ejabberd_riak:put(R#proxy65{pid_i = Pid},
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proxy65_schema());
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{ok, _} ->
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{error, conflict};
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{error, _} ->
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{error, db_failure}
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end.
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unregister_stream(SID) ->
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case ejabberd_riak:delete(proxy65, SID) of
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ok -> ok;
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{error, _} -> {error, db_failure}
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end.
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activate_stream(SID, IJID, MaxConnections, _Node) ->
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try
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case ejabberd_riak:get(proxy65, proxy65_schema(), SID) of
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{ok, #proxy65{pid_t = TPid, pid_i = IPid,
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jid_i = undefined} = R} when is_pid(IPid) ->
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{ok, Num} = ejabberd_riak:count_by_index(
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proxy65, <<"jid_i">>, IJID),
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if Num >= MaxConnections ->
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{error, {limit, IPid, TPid}};
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true ->
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ok = ejabberd_riak:put(
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R#proxy65{jid_i = IJID},
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proxy65_schema(),
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[{'2i', [{<<"jid_i">>, IJID}]}]),
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{ok, IPid, TPid}
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end;
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{ok, #proxy65{jid_i = JID}} ->
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if is_binary(JID) -> {error, conflict};
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true -> {error, notfound}
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end;
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{error, _} = Err ->
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Err
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end
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catch _:{badmatch, {error, _}} ->
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{error, db_failure}
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end.
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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proxy65_schema() ->
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{record_info(fields, proxy65), #proxy65{}}.
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clean_table() ->
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?DEBUG("Cleaning Riak 'proxy65' table...", []),
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case ejabberd_riak:get(proxy65, proxy65_schema()) of
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{ok, Rs} ->
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lists:foreach(
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fun(#proxy65{sid = SID, pid_t = TPid, pid_i = IPid}) ->
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if node(TPid) == node() orelse
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(is_pid(IPid) andalso node(IPid) == node()) ->
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ejabberd_riak:delete(proxy65, SID);
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true ->
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ok
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end
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end, Rs);
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{error, Reason} = Err ->
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?ERROR_MSG("Failed to clean Riak 'proxy65' table: ~p", [Reason]),
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Err
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end.
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