X-Git-Url: https://git.xandkar.net/?a=blobdiff_plain;f=src%2Fbeam_stats_producer.erl;h=c7ebd5e02987fea54dd8efc5f1cf37982d1e3159;hb=56baeef9aa992469400dc635b3914bdc368bbcbd;hp=5c47951a389cec9829e2e7cee349bfc5b9bd2e5c;hpb=caf75ed8160362773766c6bde005cf5f33544392;p=beam_stats.git

diff --git a/src/beam_stats_producer.erl b/src/beam_stats_producer.erl
index 5c47951..c7ebd5e 100644
--- a/src/beam_stats_producer.erl
+++ b/src/beam_stats_producer.erl
@@ -1,7 +1,5 @@
 -module(beam_stats_producer).
 
--include("beam_stats.hrl").
-
 -behaviour(gen_server).
 
 %% API
@@ -9,6 +7,9 @@
     [ start_link/0
     ,   subscribe/1
     , unsubscribe/1
+
+    % For testing
+    , sync_produce_consume/0
     ]).
 
 %% gen_server callbacks
@@ -25,12 +26,17 @@
 %% Internal data
 %% ============================================================================
 
--define(SIGNAL_PRODUCTION , beam_stats_production_signal).
+-define(PRODUCE_SYNC  , produce_sync).
+-define(PRODUCE_ASYNC , produce_async).
 
 -record(state,
     { consumers = ordsets:new() :: ordsets:ordset(pid())
+    , stats_state :: beam_stats_state:t()
     }).
 
+-type state() ::
+    #state{}.
+
 %% ============================================================================
 %%  API
 %% ============================================================================
@@ -48,13 +54,15 @@ subscribe(PID) ->
 unsubscribe(PID) ->
     gen_server:cast(?MODULE, {unsubscribe, PID}).
 
+-spec sync_produce_consume() ->
+    {}.
+sync_produce_consume() ->
+    {} = gen_server:call(?MODULE, ?PRODUCE_SYNC).
+
 %% ============================================================================
 %%  gen_server callbacks (unused)
 %% ============================================================================
 
-handle_call(_Request, _From, State) ->
-    ?METHOD_SHOULD_NOT_BE_USED(handle_call, State).
-
 code_change(_OldVsn, State, _Extra) ->
     {ok, State}.
 
@@ -68,7 +76,8 @@ terminate(_Reason, _State) ->
 init([]) ->
     ok = schedule_first_production(),
     Consumers = ordsets:new(),
-    {ok, #state{consumers=Consumers}}.
+    StatsState = beam_stats_state:new(),
+    {ok, #state{consumers=Consumers, stats_state=StatsState}}.
 
 handle_cast({subscribe, PID}, #state{consumers=Consumers1}=State) ->
     Consumers2 = ordsets:add_element(PID, Consumers1),
@@ -78,32 +87,54 @@ handle_cast({unsubscribe, PID}, #state{consumers=Consumers1}=State) ->
     Consumers2 = ordsets:del_element(PID, Consumers1),
     {noreply, State#state{consumers=Consumers2}}.
 
-handle_info(?SIGNAL_PRODUCTION, #state{consumers=ConsumersSet}=State) ->
-    ConsumersList = ordsets:to_list(ConsumersSet),
-    ok = collect_and_push_to_consumers(ConsumersList),
+handle_call(?PRODUCE_SYNC, _From, State1) ->
+    State2 = produce_sync(State1),
+    {reply, {}, State2}.
+
+handle_info(?PRODUCE_ASYNC, #state{}=State1) ->
+    State2 = produce_async(State1),
     ok = schedule_next_production(),
-    {noreply, State}.
+    {noreply, State2}.
 
 %% ============================================================================
 %%  Private
 %% ============================================================================
 
+-spec produce_sync(state()) ->
+    state().
+produce_sync(#state{}=State) ->
+    produce(State, fun beam_stats_consumer:consume_sync/2).
+
+-spec produce_async(state()) ->
+    state().
+produce_async(#state{}=State) ->
+    produce(State, fun beam_stats_consumer:consume_async/2).
+
+-spec produce(state(), fun((pid(), term()) -> ok)) ->
+    state().
+produce(
+    #state
+    { consumers   = ConsumersSet
+    , stats_state = StatsState1
+    }=State,
+    MsgSendFun
+) ->
+    StatsState2 = beam_stats_state:update(StatsState1),
+    Stats       = beam_stats_state:export(StatsState2),
+    ConsumersList = ordsets:to_list(ConsumersSet),
+    Send = fun (Consumer) -> MsgSendFun(Consumer, Stats) end,
+    ok = lists:foreach(Send, ConsumersList),
+    State#state{stats_state = StatsState2}.
+
 -spec schedule_first_production() ->
     ok.
 schedule_first_production() ->
-    _ = self() ! ?SIGNAL_PRODUCTION,
+    _ = self() ! ?PRODUCE_ASYNC,
     ok.
 
 -spec schedule_next_production() ->
     ok.
 schedule_next_production() ->
     ProductionInterval = beam_stats_config:production_interval(),
-    _ = erlang:send_after(ProductionInterval, self(), ?SIGNAL_PRODUCTION),
-    ok.
-
--spec collect_and_push_to_consumers([pid()]) ->
+    _ = erlang:send_after(ProductionInterval, self(), ?PRODUCE_ASYNC),
     ok.
-collect_and_push_to_consumers(Consumers) ->
-    BEAMStats = beam_stats:collect(),
-    Push = fun (Consumer) -> gen_server:cast(Consumer, BEAMStats) end,
-    lists:foreach(Push, Consumers).