Add Riak as BOSH RAM backend

diff --git a/src/mod_bosh_riak.erl b/src/mod_bosh_riak.erl
new file mode 100644 (file)
index 0000000..5524a0e
--- /dev/null
+++ b/src/mod_bosh_riak.erl
@@ -0,0 +1,71 @@
+%%%-------------------------------------------------------------------
+%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
+%%% Created : 15 Apr 2017 by Evgeny Khramtsov <ekhramtsov@process-one.net>
+%%%
+%%%
+%%% ejabberd, Copyright (C) 2002-2017   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.,
+%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+%%%
+%%%-------------------------------------------------------------------
+-module(mod_bosh_riak).
+-behaviour(mod_bosh).
+
+%% API
+-export([init/0, open_session/2, close_session/1, find_session/1]).
+
+-record(bosh, {sid :: binary(),
+              pid :: pid()}).
+
+-include("logger.hrl").
+
+%%%===================================================================
+%%% API
+%%%===================================================================
+init() ->
+    clean_table().
+
+open_session(SID, Pid) ->
+    ejabberd_riak:put(#bosh{sid = SID, pid = Pid}, bosh_schema()).
+
+close_session(SID) ->
+    ejabberd_riak:delete(bosh, SID).
+
+find_session(SID) ->
+    case ejabberd_riak:get(bosh, bosh_schema(), SID) of
+       {ok, #bosh{pid = Pid}} -> {ok, Pid};
+       {error, _} = Err -> Err
+    end.
+
+%%%===================================================================
+%%% Internal functions
+%%%===================================================================
+bosh_schema() ->
+    {record_info(fields, bosh), #bosh{}}.
+
+clean_table() ->
+    ?INFO_MSG("Cleaning Riak 'bosh' table...", []),
+    case ejabberd_riak:get(bosh, bosh_schema()) of
+       {ok, Rs} ->
+           lists:foreach(
+             fun(#bosh{sid = SID, pid = Pid}) when node(Pid) == node() ->
+                     ejabberd_riak:delete(bosh, SID);
+                (_) ->
+                     ok
+             end, Rs);
+       {error, Reason} = Err ->
+           ?ERROR_MSG("failed to clean Riak 'bosh' table: ~p", [Reason]),
+           Err
+    end.