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%%%-------------------------------------------------------------------
%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% @copyright (C) 2017, Evgeny Khramtsov
%%% @doc
%%%
%%% @end
%%% Created : 28 Mar 2017 by Evgeny Khramtsov <ekhramtsov@process-one.net>
%%%-------------------------------------------------------------------
-module(mod_bosh_redis).
-behaviour(mod_bosh).
%% API
-export([init/0, open_session/2, close_session/1, find_session/1]).
-include("ejabberd.hrl").
-include("logger.hrl").
-define(BOSH_KEY, "ejabberd:bosh").
%%%===================================================================
%%% API
%%%===================================================================
init() ->
clean_table().
open_session(SID, Pid) ->
PidBin = term_to_binary(Pid),
case ejabberd_redis:hset(?BOSH_KEY, SID, PidBin) of
{ok, _} ->
ok;
Err ->
?ERROR_MSG("failed to register bosh session in redis: ~p", [Err]),
Err
end.
close_session(SID) ->
case ejabberd_redis:hdel(?BOSH_KEY, [SID]) of
{ok, _} ->
ok;
Err ->
?ERROR_MSG("failed to delete bosh session in redis: ~p", [Err])
end.
find_session(SID) ->
case ejabberd_redis:hget(?BOSH_KEY, SID) of
{ok, Pid} when is_binary(Pid) ->
try
{ok, binary_to_term(Pid)}
catch _:badarg ->
?ERROR_MSG("malformed data in redis (key = '~s'): ~p",
[SID, Pid]),
error
end;
{ok, _} ->
error;
Err ->
?ERROR_MSG("failed to lookup bosh session in redis: ~p", [Err]),
error
end.
%%%===================================================================
%%% Internal functions
%%%===================================================================
clean_table() ->
?INFO_MSG("Cleaning Redis BOSH sessions...", []),
case ejabberd_redis:hgetall(?BOSH_KEY) of
{ok, Vals} ->
case ejabberd_redis:multi(
fun() ->
lists:foreach(
fun({SID, Pid}) when node(Pid) == node() ->
ejabberd_redis:hdel(?BOSH_KEY, [SID]);
(_) ->
ok
end, Vals)
end) of
{ok, _} ->
ok;
Err ->
?ERROR_MSG("failed to clean bosh sessions in redis: ~p", [Err])
end;
Err ->
?ERROR_MSG("failed to clean bosh sessions in redis: ~p", [Err])
end.
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