Merge pull request #347 from emqtt/dev-feng

fix issue #346, and spelling errors

rel/files/emqttd.config.development

@@ -115,10 +115,10 @@
             %% or inflight window is full.
             {max_length, 100},
 
-            %% Low-water mark of queued messsages
+            %% Low-water mark of queued messages
             {low_watermark, 0.2},
 
-            %% High-water mark of queued messsages
+            %% High-water mark of queued messages
             {high_watermark, 0.6},
 
             %% Queue Qos0 messages?

rel/files/emqttd.config.production

@@ -107,10 +107,10 @@
             %% or inflight window is full.
             {max_length, 100},
 
-            %% Low-water mark of queued messsages
+            %% Low-water mark of queued messages
             {low_watermark, 0.2},
 
-            %% High-water mark of queued messsages
+            %% High-water mark of queued messages
             {high_watermark, 0.6},
 
             %% Queue Qos0 messages?

src/emqttd_retained.erl

@@ -25,6 +25,7 @@
 %%% @end
 %%%-----------------------------------------------------------------------------
 
+%% TODO: should match topic tree
 -module(emqttd_retained).
 
 -author("Feng Lee <feng@emqtt.io>").
@@ -150,9 +151,9 @@ dispatch(Topic, CPid) when is_binary(Topic) ->
 init([]) ->
     StatsFun = emqttd_stats:statsfun('retained/count', 'retained/max'),
     %% One second
-    {ok, StatsTimer}  = timer:send_interval(1000, stats),
+    {ok, StatsTimer}  = timer:send_interval(timer:seconds(1), stats),
     %% Five minutes
-    {ok, ExpireTimer} = timer:send_interval(300 * 1000, expire),
+    {ok, ExpireTimer} = timer:send_interval(timer:minutes(5), expire),
     {ok, #state{stats_fun     = StatsFun,
                 expired_after = env(expired_after),
                 stats_timer   = StatsTimer,
@@ -169,6 +170,10 @@ handle_info(stats, State = #state{stats_fun = StatsFun}) ->
     StatsFun(mnesia:table_info(retained, size)),
     {noreply, State, hibernate};
 
+handle_info(expire, State = #state{expired_after = Never})
+    when Never =:= 0 orelse Never =:= undefined ->
+    {noreply, State, hibernate};
+
 handle_info(expire, State = #state{expired_after = ExpiredAfter}) ->
     expire(emqttd_util:now_to_secs(os:timestamp()) - ExpiredAfter),
     {noreply, State, hibernate};

src/emqttd_session.erl

@@ -170,9 +170,9 @@ destroy(SessPid, ClientId) ->
 subscribe(SessPid, TopicTable) ->
     subscribe(SessPid, TopicTable, fun(_) -> ok end).
 
--spec subscribe(pid(), [{binary(), mqtt_qos()}], Callback :: fun()) -> ok.
-subscribe(SessPid, TopicTable, Callback) ->
-    gen_server2:cast(SessPid, {subscribe, TopicTable, Callback}).
+-spec subscribe(pid(), [{binary(), mqtt_qos()}], AckFun :: fun()) -> ok.
+subscribe(SessPid, TopicTable, AckFun) ->
+    gen_server2:cast(SessPid, {subscribe, TopicTable, AckFun}).
 
 %%------------------------------------------------------------------------------
 %% @doc Publish message
@@ -296,20 +296,20 @@ handle_call(Req, _From, State) ->
     lager:error("Unexpected Request: ~p", [Req]),
     {reply, ok, State}.
 
-handle_cast({subscribe, TopicTable0, Callback}, Session = #session{
+handle_cast({subscribe, TopicTable0, AckFun}, Session = #session{
                 client_id = ClientId, subscriptions = Subscriptions}) ->
 
     TopicTable = emqttd_broker:foldl_hooks('client.subscribe', [ClientId], TopicTable0),
 
     case TopicTable -- Subscriptions of
         [] ->
-            catch Callback([Qos || {_, Qos} <- TopicTable]),
+            catch AckFun([Qos || {_, Qos} <- TopicTable]),
             noreply(Session);
         _  ->
             %% subscribe first and don't care if the subscriptions have been existed
             {ok, GrantedQos} = emqttd_pubsub:subscribe(TopicTable),
 
-            catch Callback(GrantedQos),
+            catch AckFun(GrantedQos),
 
             emqttd_broker:foreach_hooks('client.subscribe.after', [ClientId, TopicTable]),