add publisher

apps/aircon/src/aircon_mqtt_publisher.erl

@@ -0,0 +1,165 @@
+%%%-------------------------------------------------------------------
+%%% @author aresei
+%%% @copyright (C) 2023, <COMPANY>
+%%% @doc
+%%% 1. 需要考虑集群部署的相关问题，上行的数据可能在集群中共享
+%%% 2. host进程不能直接去监听topic，这样涉及到新增和下线的很多问题
+%%% @end
+%%% Created : 12. 3月 2023 21:27
+%%%-------------------------------------------------------------------
+-module(aircon_mqtt_publisher).
+-author("aresei").
+
+-behaviour(gen_server).
+
+%% API
+-export([start_link/0]).
+-export([publish/3]).
+-export([test/0]).
+
+%% gen_server callbacks
+-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).
+
+-define(SERVER, ?MODULE).
+
+-record(state, {
+    conn_pid :: pid()
+}).
+
+%%%===================================================================
+%%% API
+%%%===================================================================
+
+test() ->
+    Topic = <<"/aircon/20525456021829/data">>,
+    Payload = <<"{\"key\":\"OnOff\",\"value\":0,\"unit\":10,\"type\":\"AI\",\"timestamp\":1767747017459,\"name\":\"开关状态\",\"label\":\"开关状态\",\"sessionid\":760143116038215}">>,
+    publish(Topic, Payload, 2).
+
+-spec publish(Topic :: binary(), Payload :: binary(), Qos :: integer()) -> no_return().
+publish(Topic, Payload, Qos) when is_binary(Topic), is_binary(Payload), is_integer(Qos) ->
+    gen_server:cast(?SERVER, {publish, Topic, Payload, Qos}).
+
+%% @doc Spawns the server and registers the local name (unique)
+-spec(start_link() ->
+    {ok, Pid :: pid()} | ignore | {error, Reason :: term()}).
+start_link() ->
+    gen_server:start_link({local, ?SERVER}, ?MODULE, [], []).
+
+%%%===================================================================
+%%% gen_server callbacks
+%%%===================================================================
+
+%% @private
+%% @doc Initializes the server
+-spec(init(Args :: term()) ->
+    {ok, State :: #state{}} | {ok, State :: #state{}, timeout() | hibernate} |
+    {stop, Reason :: term()} | ignore).
+init([]) ->
+    %% 建立到emqx服务器的连接
+    Opts = emqx_opts(<<"aircon-data-publisher">>),
+    logger:debug("[mqtt_publisher] opts is: ~p", [Opts]),
+    case emqtt:start_link(Opts) of
+        {ok, ConnPid} ->
+            logger:debug("[mqtt_publisher] start conntecting, pid: ~p", [ConnPid]),
+            {ok, _} = emqtt:connect(ConnPid),
+            logger:debug("[mqtt_publisher] connect success"),
+            {ok, #state{conn_pid = ConnPid}};
+        ignore ->
+            logger:debug("[mqtt_publisher] connect emqx get ignore"),
+            {stop, ignore};
+        {error, Reason} ->
+            logger:debug("[mqtt_publisher] connect emqx get error: ~p", [Reason]),
+            {stop, Reason}
+    end.
+
+%% @private
+%% @doc Handling call messages
+-spec(handle_call(Request :: term(), From :: {pid(), Tag :: term()},
+    State :: #state{}) ->
+    {reply, Reply :: term(), NewState :: #state{}} |
+    {reply, Reply :: term(), NewState :: #state{}, timeout() | hibernate} |
+    {noreply, NewState :: #state{}} |
+    {noreply, NewState :: #state{}, timeout() | hibernate} |
+    {stop, Reason :: term(), Reply :: term(), NewState :: #state{}} |
+    {stop, Reason :: term(), NewState :: #state{}}).
+handle_call(_Info, _From, State = #state{conn_pid = _ConnPid}) ->
+    {reply, ok, State}.
+
+%% @private
+%% @doc Handling cast messages
+-spec(handle_cast(Request :: term(), State :: #state{}) ->
+    {noreply, NewState :: #state{}} |
+    {noreply, NewState :: #state{}, timeout() | hibernate} |
+    {stop, Reason :: term(), NewState :: #state{}}).
+handle_cast({publish, Topic, Payload, Qos}, State = #state{conn_pid = ConnPid}) ->
+    Res = emqtt:publish(ConnPid, Topic, Payload, Qos),
+    logger:debug("[mqtt_publisher] publish result is: ~p", [Res]),
+    {noreply, State}.
+
+%% @private
+%% @doc Handling all non call/cast messages
+-spec(handle_info(Info :: timeout() | term(), State :: #state{}) ->
+    {noreply, NewState :: #state{}} |
+    {noreply, NewState :: #state{}, timeout() | hibernate} |
+    {stop, Reason :: term(), NewState :: #state{}}).
+handle_info({puback, Packet = #{packet_id := _PacketId}}, State = #state{}) ->
+    logger:debug("[mqtt_publisher] receive puback packet: ~p", [Packet]),
+    {noreply, State};
+
+handle_info(Info, State = #state{}) ->
+    logger:debug("[mqtt_publisher] get info: ~p", [Info]),
+    {noreply, State}.
+
+%% @private
+%% @doc This function is called by a gen_server when it is about to
+%% terminate. It should be the opposite of Module:init/1 and do any
+%% necessary cleaning up. When it returns, the gen_server terminates
+%% with Reason. The return value is ignored.
+-spec(terminate(Reason :: (normal | shutdown | {shutdown, term()} | term()),
+    State :: #state{}) -> term()).
+terminate(Reason, _State = #state{conn_pid = ConnPid}) when is_pid(ConnPid) ->
+    ok = emqtt:disconnect(ConnPid),
+    logger:debug("[iot_mqtt_publisher] terminate with reason: ~p", [Reason]),
+    ok;
+terminate(Reason, _State) ->
+    logger:debug("[iot_mqtt_publisher] terminate with reason: ~p", [Reason]),
+    ok.
+
+%% @private
+%% @doc Convert process state when code is changed
+-spec(code_change(OldVsn :: term() | {down, term()}, State :: #state{},
+    Extra :: term()) ->
+    {ok, NewState :: #state{}} | {error, Reason :: term()}).
+code_change(_OldVsn, State = #state{}, _Extra) ->
+    {ok, State}.
+
+%%%===================================================================
+%%% Internal functions
+%%%===================================================================
+
+-spec emqx_opts(ClientSuffix :: binary()) -> list().
+emqx_opts(ClientSuffix) when is_binary(ClientSuffix) ->
+    %% 建立到emqx服务器的连接
+    {ok, Props} = application:get_env(aircon, emqx_server),
+    EMQXHost = proplists:get_value(host, Props),
+    EMQXPort = proplists:get_value(port, Props, 1883),
+    Username = proplists:get_value(username, Props),
+    Password = proplists:get_value(password, Props),
+    RetryInterval = proplists:get_value(retry_interval, Props, 5),
+    Keepalive = proplists:get_value(keepalive, Props, 86400),
+
+    Node = atom_to_binary(node()),
+    ClientId = <<"mqtt-client-", Node/binary, "-", ClientSuffix/binary>>,
+    [
+        {clientid, ClientId},
+        {host, EMQXHost},
+        {port, EMQXPort},
+        {owner, self()},
+        {tcp_opts, []},
+        {username, Username},
+        {password, Password},
+        {keepalive, Keepalive},
+        {auto_ack, true},
+        {proto_ver, v3},
+        {retry_interval, RetryInterval}
+    ].

apps/aircon/src/aircon_mqtt_subscriber.erl

@@ -51,13 +51,12 @@ start_link() ->
 init([]) ->
     %% 建立到emqx服务器的连接
     Opts = emqx_opts(<<"aircon-data-subscriber">>),
-    logger:debug("[opts] is: ~p", [Opts]),
+    logger:debug("[mqtt_subscriber] opts is: ~p", [Opts]),
     case emqtt:start_link(Opts) of
         {ok, ConnPid} ->
             logger:debug("[mqtt_subscriber] start conntecting, pid: ~p", [ConnPid]),
             {ok, _} = emqtt:connect(ConnPid),
             logger:debug("[mqtt_subscriber] connect success"),
-
             %% 监听和设备的全部事件
             SubscribeResult = emqtt:subscribe(ConnPid, ?Topics),
             logger:debug("[mqtt_subscriber] subscribe topics: ~p, result is: ~p", [?Topics, SubscribeResult]),

apps/aircon/src/aircon_sup.erl

@@ -72,6 +72,15 @@ init([]) ->
             modules => ['aircon_device_sup']
         },
 
+        #{
+            id => 'aircon_mqtt_publisher',
+            start => {'aircon_mqtt_publisher', start_link, []},
+            restart => permanent,
+            shutdown => 2000,
+            type => worker,
+            modules => ['aircon_mqtt_publisher']
+        },
+
         #{
             id => 'aircon_mqtt_subscriber',
             start => {'aircon_mqtt_subscriber', start_link, []},