add host mocker

apps/iot/src/iot_host.erl

@@ -109,7 +109,7 @@ init([Host = #host{host_id = HostId}]) ->
     {stop, Reason :: term(), Reply :: term(), NewState :: #state{}} |
     {stop, Reason :: term(), NewState :: #state{}}).
 handle_call({publish, Message}, _From, State = #state{emqx_pid = ConnPid, host = #host{host_id = HostId}}) ->
-    Topic = <<"/host/", HostId/binary, "/upstream">>,
+    Topic = <<"/host/", HostId/binary, "/downstream">>,
     Result = emqtt:publish(ConnPid, Topic, #{}, Message, [{qos, ?QOS}]),
     {reply, Result, State}.
 

apps/iot/src/iot_host_mocker.erl

@@ -0,0 +1,173 @@
+%%%-------------------------------------------------------------------
+%%% @author aresei
+%%% @copyright (C) 2023, <COMPANY>
+%%% @doc
+%%%
+%%% @end
+%%% Created : 12. 3月 2023 21:27
+%%%-------------------------------------------------------------------
+-module(iot_host_mocker).
+-author("aresei").
+-include("iot.hrl").
+
+-behaviour(gen_server).
+
+%% API
+-export([start_link/1, publish/2]).
+
+%% gen_server callbacks
+-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).
+
+-define(SERVER, ?MODULE).
+
+%% 消息的qos等级
+-define(QOS, 1).
+
+-record(state, {
+    host_id :: binary(),
+    emqx_pid :: pid()
+}).
+
+%%%===================================================================
+%%% API
+%%%===================================================================
+
+-spec publish(pid(), binary()) -> {ok, PacketId :: integer()} | {error, term()}.
+publish(Pid, Message) when is_pid(Pid), is_binary(Message) ->
+    gen_server:call(Pid, {publish, Message}).
+
+%% @doc Spawns the server and registers the local name (unique)
+-spec(start_link(HostId :: binary()) ->
+    {ok, Pid :: pid()} | ignore | {error, Reason :: term()}).
+start_link(HostId) when is_binary(HostId) ->
+    gen_server:start_link(?MODULE, [HostId], []).
+
+%%%===================================================================
+%%% 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([HostId]) ->
+    %% 建立到emqx服务器的连接
+    {ok, Props} = application:get_env(iot, emqx_server),
+    EMQXHost = proplists:get_value(host, Props),
+    EMQXPort = proplists:get_value(port, Props, 18080),
+    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),
+    Opts = [
+        {host, EMQXHost},
+        {port, EMQXPort},
+        {owner, self()},
+        {tcp_opts, []},
+        {username, Username},
+        {password, Password},
+        {keepalive, Keepalive},
+        {retry_interval, RetryInterval}
+    ],
+
+    case emqtt:start_link(Opts) of
+        {ok, ConnPid} ->
+            lager:debug("[iot_host] connect success, pid: ~p", [ConnPid]),
+            %% 快速启动避免阻塞iot_host_sup的启动
+            erlang:start_timer(0, self(), subscribe_ticker),
+
+            {ok, #state{host_id = HostId, emqx_pid = ConnPid}};
+        ignore ->
+            lager:debug("[iot_host] connect emqx get ignore"),
+            {stop, ignore};
+        {error, Reason} ->
+            lager:debug("[iot_host] 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({publish, Message}, _From, State = #state{emqx_pid = ConnPid, host_id = HostId}) ->
+    Topic = <<"/host/", HostId/binary, "/upstream">>,
+    Result = emqtt:publish(ConnPid, Topic, #{}, Message, [{qos, ?QOS}]),
+    {reply, Result, 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(_Request, State = #state{}) ->
+    {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{}}).
+%% 处理topic的订阅事件
+handle_info({timeout, _, subscribe_ticker}, State = #state{emqx_pid = ConnPid, host_id = HostId}) ->
+    %% 监听和host相关的全部事件
+    {ok, _} = emqtt:connect(ConnPid),
+    Topics = [
+        {<<"/host/", HostId/binary, "/downstream">>, ?QOS}
+    ],
+    SubscribeResult = emqtt:subscribe(ConnPid, Topics),
+    lager:debug("[iot_host] host_id: ~p, subscribe result is: ~p", [HostId, SubscribeResult]),
+
+    {noreply, State#state{emqx_pid = ConnPid}};
+
+handle_info({disconnect, ReasonCode, Properties}, State = #state{host_id = HostId}) ->
+
+    lager:debug("[iot_host] host: ~p, Recv a DISONNECT packet - ReasonCode: ~p, Properties: ~p", [HostId, ReasonCode, Properties]),
+    {stop, disconnected, State};
+handle_info({publish, Message = #{packet_id := PacketId, payload := Payload}}, State = #state{emqx_pid = ConnPid, host_id = HostId}) ->
+    lager:debug("[iot_host] host: ~p, Recv a publish packet: ~p, payload: ~p", [HostId, Message, Payload]),
+    % emqtt:pubrec(ConnPid, PacketId),
+    {noreply, State};
+handle_info({puback, #{packet_id := PacketId, reason_code := ReasonCode}}, State = #state{host_id = HostId}) ->
+    lager:debug("[iot_host] host: ~p, receive puback packet_id: ~p, reason_code: ~p", [HostId, PacketId, ReasonCode]),
+    {noreply, State};
+
+handle_info(Info, State = #state{host_id = HostId}) ->
+    lager:debug("host_id: ~p, get info: ~p", [HostId, 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{emqx_pid = ConnPid}) when is_pid(ConnPid) ->
+    {ok, _Props, _ReasonCode} = emqtt:unsubscribe(ConnPid, #{}, <<"hello">>),
+    ok = emqtt:disconnect(ConnPid),
+    ok = emqtt:stop(ConnPid),
+    ok;
+terminate(Reason, _State) ->
+    lager:debug("[iot_host] 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
+%%%===================================================================