From 46f752414140fa82d0e2efdfb4ea86ea3f264a91 Mon Sep 17 00:00:00 2001
From: anlicheng <244108715@qq.com>
Date: Wed, 30 Apr 2025 11:05:44 +0800
Subject: [PATCH] fix tcp_channel

---
 apps/efka/src/tcp_channel.erl | 102 +++++++++++++++++++++++++++++++++-
 1 file changed, 100 insertions(+), 2 deletions(-)

diff --git a/apps/efka/src/tcp_channel.erl b/apps/efka/src/tcp_channel.erl
index dc07066..af76c28 100644
--- a/apps/efka/src/tcp_channel.erl
+++ b/apps/efka/src/tcp_channel.erl
@@ -13,22 +13,67 @@
 
 %% API
 -export([start_link/1]).
+-export([push_metric/2, push_param/2, poll/2]).
 
 %% gen_server callbacks
 -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).
 
 -define(SERVER, ?MODULE).
 
+%% 消息类型
+
+%% 服务注册
+-define(PACKET_TYPE_REGISTER, 16).
+%% 上传数据
+-define(PACKET_TYPE_METRIC_DATA, 3).
+%% 消息响应
+-define(PACKET_TYPE_RESPONSE, 7).
+%% efka下发给微服务参数
+-define(PACKET_TYPE_PUSH_PARAM, 5).
+%% efka下发给微服务采集项
+-define(PACKET_TYPE_PUSH_METRIC, 6).
+%% 设备状态轮询: 增加日期: 2025-4-16
+-define(PACKET_TYPE_POLL, 20).
+%% 微服务给efka发送log消息
+-define(PACKET_TYPE_LOG, 9).
+%% 微服务从efka获取自身的采集项
+-define(PACKET_TYPE_REQUEST_METRIC, 10).
+%% 微服务从efka获取自身的参数
+-define(PACKET_TYPE_REQUEST_PARAM, 12).
+%% 微服务事件上报
+-define(PACKET_TYPE_EVENT, 15).
+
 -record(state, {
-    socket
+    packet_id = 1,
+    socket :: gen_tcp:socket(),
+    micro_service_id :: undefined | binary(),
+    is_registered = false :: boolean(),
+
+    %% 请求响应的对应关系, #{packet_id => {ReceiverPid, Ref}}
+    inflight = #{}
 }).
 
 %%%===================================================================
 %%% API
 %%%===================================================================
 
+push_param(ChannelPid, Params) when is_pid(ChannelPid), is_binary(Params) ->
+    Ref = make_ref(),
+    gen_server:cast(ChannelPid, {push_param, Ref, self(), Params}),
+    {ok, Ref}.
+
+push_metric(ChannelPid, Metrics) when is_pid(ChannelPid), is_binary(Metrics) ->
+    Ref = make_ref(),
+    gen_server:cast(ChannelPid, {push_metric, Ref, self(), Metrics}),
+    {ok, Ref}.
+
+poll(ChannelPid, Command) when is_pid(ChannelPid), is_binary(Command) ->
+    Ref = make_ref(),
+    gen_server:cast(ChannelPid, {poll, Ref, self(), Command}),
+    {ok, Ref}.
+
 %% @doc Spawns the server and registers the local name (unique)
--spec(start_link(Socket :: any()) ->
+-spec(start_link(Socket :: gen_tcp:socket()) ->
     {ok, Pid :: pid()} | ignore | {error, Reason :: term()}).
 start_link(Socket) ->
     gen_server:start_link(?MODULE, [Socket], []).
@@ -66,6 +111,19 @@ handle_call(_Request, _From, State = #state{}) ->
     {noreply, NewState :: #state{}} |
     {noreply, NewState :: #state{}, timeout() | hibernate} |
     {stop, Reason :: term(), NewState :: #state{}}).
+%% 推送参数项目
+handle_cast({push_param, Ref, ReceiverPid, Params}, State = #state{socket = Socket, packet_id = PacketId, inflight = Inflight}) ->
+    ok = gen_tcp:send(Socket, <<PacketId:32, ?PACKET_TYPE_PUSH_PARAM:8, Params/binary>>),
+    {noreply, State#state{inflight = maps:put(PacketId, {ReceiverPid, Ref}, Inflight)}};
+%% 推送采集项目
+handle_cast({push_metric, Ref, ReceiverPid, Metrics}, State = #state{socket = Socket, packet_id = PacketId, inflight = Inflight}) ->
+    ok = gen_tcp:send(Socket, <<PacketId:32, ?PACKET_TYPE_PUSH_METRIC:8, Metrics/binary>>),
+    {noreply, State#state{inflight = maps:put(PacketId, {ReceiverPid, Ref}, Inflight)}};
+%% 推送poll请求
+handle_cast({poll, Ref, ReceiverPid, Command}, State = #state{socket = Socket, packet_id = PacketId, inflight = Inflight}) ->
+    ok = gen_tcp:send(Socket, <<PacketId:32, ?PACKET_TYPE_POLL:8, Command/binary>>),
+    {noreply, State#state{inflight = maps:put(PacketId, {ReceiverPid, Ref}, Inflight)}};
+
 handle_cast(_Request, State = #state{}) ->
     {noreply, State}.
 
@@ -75,6 +133,46 @@ handle_cast(_Request, State = #state{}) ->
     {noreply, NewState :: #state{}} |
     {noreply, NewState :: #state{}, timeout() | hibernate} |
     {stop, Reason :: term(), NewState :: #state{}}).
+%% 注册
+handle_info({tcp, Socket, <<PacketId:32, ?PACKET_TYPE_REGISTER:8, MicroServiceId/binary>>}, State = #state{socket = Socket}) ->
+    ok = gen_tcp:send(Socket, <<PacketId:32, ?PACKET_TYPE_RESPONSE:8, 1:8>>),
+    {noreply, State#state{micro_service_id = MicroServiceId, is_registered = true}};
+
+handle_info({tcp, Socket, <<PacketId:32, ?PACKET_TYPE_METRIC_DATA:8, Body/binary>>}, State = #state{socket = Socket}) ->
+    lager:debug("[tcp_channel] get metric data: ~p", [Body]),
+
+    ok = gen_tcp:send(Socket, <<PacketId:32, ?PACKET_TYPE_RESPONSE:8, 1:8>>),
+    {noreply, State};
+
+handle_info({tcp, Socket, <<PacketId:32, ?PACKET_TYPE_REQUEST_METRIC:8>>}, State = #state{socket = Socket}) ->
+    ok = gen_tcp:send(Socket, <<PacketId:32, ?PACKET_TYPE_RESPONSE:8, 1:8>>),
+    {noreply, State};
+
+handle_info({tcp, Socket, <<PacketId:32, ?PACKET_TYPE_REQUEST_PARAM:8>>}, State = #state{socket = Socket}) ->
+    ok = gen_tcp:send(Socket, <<PacketId:32, ?PACKET_TYPE_RESPONSE:8, 1:8>>),
+    {noreply, State};
+
+%% 收到端上的响应
+handle_info({tcp, Socket, <<PacketId:32, ?PACKET_TYPE_RESPONSE:8, Response/binary>>}, State = #state{socket = Socket, inflight = Inflight}) ->
+    case maps:take(PacketId, Inflight) of
+        error ->
+            lager:warning("[tcp_channel] get unknown publish response message: ~p, packet_id: ~p", [Response, PacketId]),
+            {noreply, State};
+        {{ReceiverPid, Ref}, NInflight} ->
+            case is_pid(ReceiverPid) andalso is_process_alive(ReceiverPid) of
+                true ->
+                    case Response of
+                        <<1:8, Result/binary>> ->
+                            ReceiverPid ! {channel_reply, Ref, {ok, Result}};
+                        <<0:8, Error/binary>> ->
+                            ReceiverPid ! {channel_reply, Ref, {error, Error}}
+                    end;
+                false ->
+                    lager:warning("[tcp_channel] get publish response message: ~p, packet_id: ~p, but receiver_pid is deaded", [Response, PacketId])
+            end,
+            {noreply, State#state{inflight = NInflight}}
+    end;
+
 handle_info(Info, State = #state{}) ->
     lager:debug("[tcp_channel] get info: ~p", [Info]),
     {noreply, State}.