Add Riak as session manager RAM backend

src/ejabberd_riak_sup.erl

@@ -77,15 +77,22 @@ is_riak_configured() ->
     lists:any(fun is_riak_configured/1, ?MYHOSTS).
 
 is_riak_configured(Host) ->
-    ServerConfigured = ejabberd_config:get_option(
+    ServerConfigured = ejabberd_config:has_option({riak_server, Host}),
-			 {riak_server, Host},
+    PortConfigured = ejabberd_config:has_option({riak_port, Host}),
-			 fun(_) -> true end, false),
+    StartIntervalConfigured = ejabberd_config:has_option({riak_start_interval, Host}),
-    PortConfigured = ejabberd_config:get_option(
+    PoolConfigured = ejabberd_config:has_option({riak_pool_size, Host}),
-		       {riak_port, Host},
+    CacertConfigured = ejabberd_config:has_option({riak_cacertfile, Host}),
-		       fun(_) -> true end, false),
+    UserConfigured = ejabberd_config:has_option({riak_username, Host}),
+    PassConfigured = ejabberd_config:has_option({riak_password, Host}),
     AuthConfigured = lists:member(
 		       ejabberd_auth_riak,
 		       ejabberd_auth:auth_modules(Host)),
+    SMConfigured = ejabberd_config:get_option(
+		     {sm_db_type, Host},
+		     ejabberd_sm:opt_type(sm_db_type)) == riak,
+    RouterConfigured = ejabberd_config:get_option(
+			 {router_db_type, Host},
+			 ejabberd_router:opt_type(router_db_type)) == riak,
     Modules = ejabberd_config:get_option(
 		{modules, Host},
 		fun(L) when is_list(L) -> L end, []),
@@ -93,7 +100,10 @@ is_riak_configured(Host) ->
 				   fun({Module, Opts}) ->
 					   gen_mod:db_type(Host, Opts, Module) == riak
 				   end, Modules),
-    ServerConfigured or PortConfigured
+    ServerConfigured or PortConfigured or StartIntervalConfigured
+	or PoolConfigured or CacertConfigured
+	or UserConfigured or PassConfigured
+	or SMConfigured or RouterConfigured
 	or AuthConfigured or ModuleWithRiakDBConfigured.
 
 start_link() ->

src/ejabberd_sm_riak.erl

@@ -0,0 +1,72 @@
+%%%-------------------------------------------------------------------
+%%% @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(ejabberd_sm_riak).
+-behaviour(ejabberd_sm).
+
+%% API
+-export([init/0, set_session/1, delete_session/1, get_sessions/0,
+	 get_sessions/1, get_sessions/2]).
+
+-include("ejabberd_sm.hrl").
+-include("logger.hrl").
+
+%%%===================================================================
+%%% API
+%%%===================================================================
+init() ->
+    clean_table().
+
+set_session(Session) ->
+    ejabberd_riak:put(Session, session_schema(),
+		      [{'2i', [{<<"us">>, Session#session.us}]}]).
+
+delete_session(Session) ->
+    ejabberd_riak:delete(session, Session#session.sid).
+
+get_sessions() ->
+    case ejabberd_riak:get(session, session_schema()) of
+	{ok, Ss} -> Ss;
+	{error, _} -> []
+    end.
+
+get_sessions(LServer) ->
+    [S || S <- get_sessions(), element(2, S#session.us) == LServer].
+
+get_sessions(U, S) ->
+    ejabberd_riak:get_by_index(session, session_schema(), <<"us">>, {U, S}).
+
+%%%===================================================================
+%%% Internal functions
+%%%===================================================================
+session_schema() ->
+    {record_info(fields, session), #session{}}.
+
+clean_table() ->
+    %% TODO: not very efficient, rewrite using map-reduce or something
+    ?INFO_MSG("Cleaning Riak 'sm' table...", []),
+    lists:foreach(
+      fun(#session{sid = {_, Pid} = SID}) when node(Pid) == node() ->
+	      ejabberd_riak:delete(session, SID);
+	 (_) ->
+	      ok
+      end, get_sessions()).

test/ejabberd_SUITE_data/ejabberd.yml

@@ -308,6 +308,7 @@ Welcome to this XMPP server."
   "riak.localhost":
     queue_type: ram
     auth_method: riak
+    sm_db_type: riak
     modules: 
       mod_announce: 
         db_type: riak