update

2026-04-28 04:28:34 +00:00 · 2020-03-06 17:10:28 +08:00
35 changed files with 569 additions and 1661 deletions
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -1,28 +0,0 @@
-# This workflow will build a golang project
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
-
-name: Go
-
-on:
-  push:
-    branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
-
-jobs:
-
-  build:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-
-    - name: Set up Go
-      uses: actions/setup-go@v3
-      with:
-        go-version: 1.19
-
-    - name: Build
-      run: go build -v ./...
-
-    - name: Test
-      run: go test -v ./...
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -1,18 +0,0 @@
-name: MacOS build
-
-on: [push, pull_request]
-
-jobs:
-
-  build:
-    runs-on: macos-latest
-    steps:
-    - uses: actions/checkout@v2
-
-    - name: Set up Go
-      uses: actions/setup-go@v2
-      with:
-        go-version: 1.18
-
-    - name: Build
-      run: go build -v ./...
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -1,18 +0,0 @@
-name: Ubuntu build
-
-on: [push, pull_request]
-
-jobs:
-    
-    build:
-      runs-on: ubuntu-latest
-      steps:
-      - uses: actions/checkout@v2
-
-      - name: Set up Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.18
-
-      - name: Build
-        run: go build -v ./...
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -1,18 +0,0 @@
-name: Windows build
-
-on: [push, pull_request]
-
-jobs:
-    
-    build:
-      runs-on: windows-latest
-      steps:
-      - uses: actions/checkout@v2
-
-      - name: Set up Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.18
-
-      - name: Build
-        run: go build -v ./...
--- a/.gitignore
+++ b/.gitignore
@@ -1,13 +1,4 @@
 hmq
 log
 log/*
-*.test
-# ide
-.idea
-.vscode/settings.json
-.pre-commit-config.yaml
-hmq.exe
-*.sw*
-*.swo
-*.swp
-*.swn
+*.test
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -0,0 +1,8 @@
+{
+    "go.lintFlags": [
+        "--disable=all",
+        "--enable=errcheck,varcheck,deadcode",
+        "--enable=varcheck",
+        "--enable=deadcode"
+    ]
+}
--- a/6
+++ b/6
@@ -1,12 +1,12 @@
-FROM golang:1.18 as builder
+FROM golang:1.12 as builder
 WORKDIR /go/src/github.com/fhmq/hmq
 COPY . .
 RUN CGO_ENABLED=0 go build -o hmq -a -ldflags '-extldflags "-static"' .


-FROM alpine:3.17.3
+FROM alpine:3.8
 WORKDIR /
 COPY --from=builder /go/src/github.com/fhmq/hmq/hmq .
 EXPOSE 1883

-ENTRYPOINT ["/hmq"]
+CMD ["/hmq"]
--- a/README.md
+++ b/README.md
@@ -1,4 +1,3 @@
-
 Free and High Performance MQTT Broker 
 ============

@@ -136,7 +135,7 @@ Other Version Of Cluster Based On gRPC: [click here](https://github.com/fhmq/rhm

 ## Reference

-* Surgermq.(https://github.com/zentures/surgemq)
+* Surgermq.(https://github.com/surgemq/surgemq)

 ## Benchmark Tool

--- a/broker/bridge.go
+++ b/broker/bridge.go
@@ -5,13 +5,11 @@ import (
 	"go.uber.org/zap"
 )

-func (b *Broker) Publish(e *bridge.Elements) bool {
+func (b *Broker) Publish(e *bridge.Elements) {
 	if b.bridgeMQ != nil {
-		cost, err := b.bridgeMQ.Publish(e)
+		err := b.bridgeMQ.Publish(e)
 		if err != nil {
 			log.Error("send message to mq error.", zap.Error(err))
 		}
-		return cost
 	}
-	return false
 }
--- a/broker/broker.go
+++ b/broker/broker.go
@@ -2,23 +2,22 @@ package broker

 import (
 	"crypto/tls"
-	"errors"
 	"fmt"
 	"net"
 	"net/http"
 	"sync"
 	"time"
-	encJson "encoding/json"
+
+	"github.com/fhmq/hmq/plugins/bridge"
+
+	"github.com/fhmq/hmq/plugins/auth"

 	"github.com/fhmq/hmq/broker/lib/sessions"
 	"github.com/fhmq/hmq/broker/lib/topics"
-	"github.com/fhmq/hmq/plugins/auth"
-	"github.com/fhmq/hmq/plugins/bridge"
-	"github.com/fhmq/hmq/pool"

 	"github.com/eclipse/paho.mqtt.golang/packets"
+	"github.com/fhmq/hmq/pool"
 	"go.uber.org/zap"
-	"go.uber.org/zap/zapcore"
 	"golang.org/x/net/websocket"
 )

@@ -58,37 +57,6 @@ func newMessagePool() []chan *Message {
 	return pool
 }

-func getAdditionalLogFields(clientIdentifier string, conn net.Conn, additionalFields ...zapcore.Field) []zapcore.Field {
-	var wsConn *websocket.Conn = nil
-	var wsEnabled bool
-	result := []zapcore.Field{}
-
-	switch conn.(type) {
-	case *websocket.Conn:
-		wsEnabled = true
-		wsConn = conn.(*websocket.Conn)
-	case *net.TCPConn:
-		wsEnabled = false
-	}
-
-	// add optional fields
-	if len(additionalFields) > 0 {
-		result = append(result, additionalFields...)
-	}
-
-	// add client ID
-	result = append(result, zap.String("clientID", clientIdentifier))
-
-	// add remote connection address
-	if !wsEnabled && conn != nil && conn.RemoteAddr() != nil {
-		result = append(result, zap.Stringer("addr", conn.RemoteAddr()))
-	} else if wsEnabled && wsConn != nil && wsConn.Request() != nil {
-		result = append(result, zap.String("addr", wsConn.Request().RemoteAddr))
-	}
-
-	return result
-}
-
 func NewBroker(config *Config) (*Broker, error) {
 	if config == nil {
 		config = DefaultConfig
@@ -124,8 +92,8 @@ func NewBroker(config *Config) (*Broker, error) {
 		b.tlsConfig = tlsconfig
 	}

-	b.auth = b.config.Plugin.Auth
-	b.bridgeMQ = b.config.Plugin.Bridge
+	b.auth = auth.NewAuth(b.config.Plugin.Auth)
+	b.bridgeMQ = bridge.NewBridgeMQ(b.config.Plugin.Bridge)

 	return b, nil
 }
@@ -155,7 +123,7 @@ func (b *Broker) Start() {
 		go InitHTTPMoniter(b)
 	}

-	//listen client over tcp
+	//listen clinet over tcp
 	if b.config.Port != "" {
 		go b.StartClientListening(false)
 	}
@@ -187,17 +155,15 @@ func (b *Broker) StartWebsocketListening() {
 	path := b.config.WsPath
 	hp := ":" + b.config.WsPort
 	log.Info("Start Websocket Listener on:", zap.String("hp", hp), zap.String("path", path))
-	ws := &websocket.Server{Handler: websocket.Handler(b.wsHandler)}
-	mux := http.NewServeMux()
-	mux.Handle(path, ws)
+	http.Handle(path, websocket.Handler(b.wsHandler))
 	var err error
 	if b.config.WsTLS {
-		err = http.ListenAndServeTLS(hp, b.config.TlsInfo.CertFile, b.config.TlsInfo.KeyFile, mux)
+		err = http.ListenAndServeTLS(hp, b.config.TlsInfo.CertFile, b.config.TlsInfo.KeyFile, nil)
 	} else {
-		err = http.ListenAndServe(hp, mux)
+		err = http.ListenAndServe(hp, nil)
 	}
 	if err != nil {
-		log.Error("ListenAndServe" + err.Error())
+		log.Error("ListenAndServe:" + err.Error())
 		return
 	}
 }
@@ -205,66 +171,46 @@ func (b *Broker) StartWebsocketListening() {
 func (b *Broker) wsHandler(ws *websocket.Conn) {
 	// io.Copy(ws, ws)
 	ws.PayloadType = websocket.BinaryFrame
-	err:=b.handleConnection(CLIENT, ws)
-	if err!=nil{
-		ws.Close()
-	}
+	b.handleConnection(CLIENT, ws)
 }

 func (b *Broker) StartClientListening(Tls bool) {
+	var hp string
 	var err error
 	var l net.Listener
-	// Retry listening indefinitely so that specifying IP addresses
-	// (e.g. --host=10.0.0.217) starts working once the IP address is actually
-	// configured on the interface.
-	for {
-		if Tls {
-			hp := b.config.TlsHost + ":" + b.config.TlsPort
-			l, err = tls.Listen("tcp", hp, b.tlsConfig)
-			log.Info("Start TLS Listening client on ", zap.String("hp", hp))
-		} else {
-			hp := b.config.Host + ":" + b.config.Port
-			l, err = net.Listen("tcp", hp)
-			log.Info("Start Listening client on ", zap.String("hp", hp))
-		}
-
-		if err == nil {
-			break // successfully listening
-		}
-
-		log.Error("Error listening on ", zap.Error(err))
-		time.Sleep(1 * time.Second)
+	if Tls {
+		hp = b.config.TlsHost + ":" + b.config.TlsPort
+		l, err = tls.Listen("tcp", hp, b.tlsConfig)
+		log.Info("Start TLS Listening client on ", zap.String("hp", hp))
+	} else {
+		hp := b.config.Host + ":" + b.config.Port
+		l, err = net.Listen("tcp", hp)
+		log.Info("Start Listening client on ", zap.String("hp", hp))
+	}
+	if err != nil {
+		log.Error("Error listening on ", zap.Error(err))
+		return
 	}
-
 	tmpDelay := 10 * ACCEPT_MIN_SLEEP
 	for {
 		conn, err := l.Accept()
 		if err != nil {
 			if ne, ok := err.(net.Error); ok && ne.Temporary() {
-				log.Error(
-					"Temporary Client Accept Error(%v), sleeping %dms",
-					zap.Error(ne),
-					zap.Duration("sleeping", tmpDelay/time.Millisecond),
-				)
-
+				log.Error("Temporary Client Accept Error(%v), sleeping %dms",
+					zap.Error(ne), zap.Duration("sleeping", tmpDelay/time.Millisecond))
 				time.Sleep(tmpDelay)
 				tmpDelay *= 2
 				if tmpDelay > ACCEPT_MAX_SLEEP {
 					tmpDelay = ACCEPT_MAX_SLEEP
 				}
 			} else {
-				log.Error("Accept error", zap.Error(err))
+				log.Error("Accept error: %v", zap.Error(err))
 			}
 			continue
 		}
-
 		tmpDelay = ACCEPT_MIN_SLEEP
-		go func(){
-			err :=b.handleConnection(CLIENT, conn)
-			if err!=nil{
-				conn.Close()
-			}
-		}()
+		go b.handleConnection(CLIENT, conn)
+
 	}
 }

@@ -274,7 +220,7 @@ func (b *Broker) StartClusterListening() {

 	l, e := net.Listen("tcp", hp)
 	if e != nil {
-		log.Error("Error listening on", zap.Error(e))
+		log.Error("Error listening on ", zap.Error(e))
 		return
 	}

@@ -283,82 +229,70 @@ func (b *Broker) StartClusterListening() {
 		conn, err := l.Accept()
 		if err != nil {
 			if ne, ok := err.(net.Error); ok && ne.Temporary() {
-				log.Error(
-					"Temporary Client Accept Error(%v), sleeping %dms",
-					zap.Error(ne),
-					zap.Duration("sleeping", tmpDelay/time.Millisecond),
-				)
-
+				log.Error("Temporary Client Accept Error(%v), sleeping %dms",
+					zap.Error(ne), zap.Duration("sleeping", tmpDelay/time.Millisecond))
 				time.Sleep(tmpDelay)
 				tmpDelay *= 2
 				if tmpDelay > ACCEPT_MAX_SLEEP {
 					tmpDelay = ACCEPT_MAX_SLEEP
 				}
 			} else {
-				log.Error("Accept error", zap.Error(err))
+				log.Error("Accept error: %v", zap.Error(err))
 			}
 			continue
 		}
 		tmpDelay = ACCEPT_MIN_SLEEP

-		go func(){
-			err :=b.handleConnection(ROUTER, conn)
-			if err!=nil{
-				conn.Close()
-			}
-		}()
+		go b.handleConnection(ROUTER, conn)
 	}
 }

-func (b *Broker) DisConnClientByClientId(clientId string) {
-	cli, loaded := b.clients.LoadAndDelete(clientId)
-	if !loaded {
-		return
-	}
-	conn, success := cli.(*client)
-	if !success {
-		return
-	}
-	conn.Close()
-}
-
-func (b *Broker) handleConnection(typ int, conn net.Conn) error{
+func (b *Broker) handleConnection(typ int, conn net.Conn) {
 	//process connect packet
 	packet, err := packets.ReadPacket(conn)
 	if err != nil {
-		return errors.New(fmt.Sprintln("read connect packet error:%v",err))
+		log.Error("read connect packet error: ", zap.Error(err))
+		return
 	}
 	if packet == nil {
-		return errors.New("received nil packet")
+		log.Error("received nil packet")
+		return
 	}
 	msg, ok := packet.(*packets.ConnectPacket)
 	if !ok {
-		return errors.New("received msg that was not Connect")
+		log.Error("received msg that was not Connect")
+		return
 	}

-	log.Info("read connect from ", getAdditionalLogFields(msg.ClientIdentifier, conn)...)
+	log.Info("read connect from ", zap.String("clientID", msg.ClientIdentifier))

 	connack := packets.NewControlPacket(packets.Connack).(*packets.ConnackPacket)
 	connack.SessionPresent = msg.CleanSession
 	connack.ReturnCode = msg.Validate()

 	if connack.ReturnCode != packets.Accepted {
-		if err := connack.Write(conn); err != nil {
-			return errors.New(fmt.Sprintln("send connack error:%v,clientID:%v,conn:%v",err,msg.ClientIdentifier,conn))
+		err = connack.Write(conn)
+		if err != nil {
+			log.Error("send connack error, ", zap.Error(err), zap.String("clientID", msg.ClientIdentifier))
+			return
 		}
-		return errors.New(fmt.Sprintln("connect packet validate failed with connack.ReturnCode%v",connack.ReturnCode))
+		return
 	}

-	if typ == CLIENT && !b.CheckConnectAuth(msg.ClientIdentifier, msg.Username, string(msg.Password)) {
+	if typ == CLIENT && !b.CheckConnectAuth(string(msg.ClientIdentifier), string(msg.Username), string(msg.Password)) {
 		connack.ReturnCode = packets.ErrRefusedNotAuthorised
-		if err := connack.Write(conn); err != nil {
-			return errors.New(fmt.Sprintln("send connack error:%v,clientID:%v,conn:%v",err,msg.ClientIdentifier,conn))
+		err = connack.Write(conn)
+		if err != nil {
+			log.Error("send connack error, ", zap.Error(err), zap.String("clientID", msg.ClientIdentifier))
+			return
 		}
-		return errors.New(fmt.Sprintln("connect packet CheckConnectAuth failed with connack.ReturnCode%v",connack.ReturnCode))
+		return
 	}

-	if err := connack.Write(conn); err != nil {
-		return errors.New(fmt.Sprintln("send connack error:%v,clientID:%v,conn:%v",err,msg.ClientIdentifier,conn))
+	err = connack.Write(conn)
+	if err != nil {
+		log.Error("send connack error, ", zap.Error(err), zap.String("clientID", msg.ClientIdentifier))
+		return
 	}

 	willmsg := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
@@ -388,54 +322,44 @@ func (b *Broker) handleConnection(typ int, conn net.Conn) error{

 	c.init()

-	if err := b.getSession(c, msg, connack); err != nil {
-		return errors.New(fmt.Sprintln("get session error:%v,clientID:%v,conn:%v",err,msg.ClientIdentifier,conn))
+	err = b.getSession(c, msg, connack)
+	if err != nil {
+		log.Error("get session error: ", zap.String("clientID", c.info.clientID))
+		return
 	}

 	cid := c.info.clientID

-	var exists bool
+	var exist bool
 	var old interface{}

 	switch typ {
 	case CLIENT:
-		old, exists = b.clients.Load(cid)
-		if exists {
-			if ol, ok := old.(*client); ok {
-				log.Warn("client exists, close old client", getAdditionalLogFields(ol.info.clientID, ol.conn)...)
+		old, exist = b.clients.Load(cid)
+		if exist {
+			log.Warn("client exist, close old...", zap.String("clientID", c.info.clientID))
+			ol, ok := old.(*client)
+			if ok {
 				ol.Close()
 			}
 		}
 		b.clients.Store(cid, c)

-		var pubPack = PubPacket{}
-		if willmsg != nil {
-			pubPack.TopicName = info.willMsg.TopicName
-			pubPack.Payload = info.willMsg.Payload
-		}
-		
-		pubInfo := Info{
-			ClientID: info.clientID,
-			Username: info.username,
-			Password: info.password,
-			Keepalive: info.keepalive,
-			WillMsg: pubPack,
-		}
-
-		b.OnlineOfflineNotification(pubInfo, true, c.lastMsgTime)
+		b.OnlineOfflineNotification(cid, true)
 		{
 			b.Publish(&bridge.Elements{
-				ClientID:  msg.ClientIdentifier,
-				Username:  msg.Username,
+				ClientID:  string(msg.ClientIdentifier),
+				Username:  string(msg.Username),
 				Action:    bridge.Connect,
 				Timestamp: time.Now().Unix(),
 			})
 		}
 	case ROUTER:
-		old, exists = b.routes.Load(cid)
-		if exists {
-			if ol, ok := old.(*client); ok {
-				log.Warn("router exists, close old router", getAdditionalLogFields(ol.info.clientID, ol.conn)...)
+		old, exist = b.routes.Load(cid)
+		if exist {
+			log.Warn("router exist, close old...")
+			ol, ok := old.(*client)
+			if ok {
 				ol.Close()
 			}
 		}
@@ -443,7 +367,6 @@ func (b *Broker) handleConnection(typ int, conn net.Conn) error{
 	}

 	c.readLoop()
-	return nil
 }

 func (b *Broker) ConnectToDiscovery() {
@@ -453,8 +376,8 @@ func (b *Broker) ConnectToDiscovery() {
 	for {
 		conn, err = net.Dial("tcp", b.config.Router)
 		if err != nil {
-			log.Error("Error trying to connect to route", zap.Error(err))
-			log.Debug("Connect to route timeout, retry...")
+			log.Error("Error trying to connect to route: ", zap.Error(err))
+			log.Debug("Connect to route timeout ,retry...")

 			if 0 == tempDelay {
 				tempDelay = 1 * time.Second
@@ -470,7 +393,7 @@ func (b *Broker) ConnectToDiscovery() {
 		}
 		break
 	}
-	log.Debug("connect to router success", zap.String("Router", b.config.Router))
+	log.Debug("connect to router success :", zap.String("Router", b.config.Router))

 	cid := b.id
 	info := info{
@@ -520,13 +443,13 @@ func (b *Broker) connectRouter(id, addr string) {

 		conn, err = net.Dial("tcp", addr)
 		if err != nil {
-			log.Error("Error trying to connect to route", zap.Error(err))
+			log.Error("Error trying to connect to route: ", zap.Error(err))

 			if retryTimes > 50 {
 				return
 			}

-			log.Debug("Connect to route timeout, retry...")
+			log.Debug("Connect to route timeout ,retry...")

 			if 0 == timeDelay {
 				timeDelay = 1 * time.Second
@@ -566,6 +489,7 @@ func (b *Broker) connectRouter(id, addr string) {

 	c.SendConnect()

+	// mpool := b.messagePool[fnv1a.HashString64(cid)%MessagePoolNum]
 	go c.readLoop()
 	go c.StartPing()

@@ -594,71 +518,71 @@ func (b *Broker) checkNodeExist(id, url string) bool {
 }

 func (b *Broker) CheckRemoteExist(remoteID, url string) bool {
-	exists := false
+	exist := false
 	b.remotes.Range(func(key, value interface{}) bool {
 		v, ok := value.(*client)
 		if ok {
 			if v.route.remoteUrl == url {
 				v.route.remoteID = remoteID
-				exists = true
+				exist = true
 				return false
 			}
 		}
 		return true
 	})
-	return exists
+	return exist
 }

 func (b *Broker) SendLocalSubsToRouter(c *client) {
 	subInfo := packets.NewControlPacket(packets.Subscribe).(*packets.SubscribePacket)
 	b.clients.Range(func(key, value interface{}) bool {
 		client, ok := value.(*client)
-		if !ok {
-			return true
+		if ok {
+			subs := client.subMap
+			for _, sub := range subs {
+				subInfo.Topics = append(subInfo.Topics, sub.topic)
+				subInfo.Qoss = append(subInfo.Qoss, sub.qos)
+			}
 		}
-
-		client.subMapMu.RLock()
-		defer client.subMapMu.RUnlock()
-
-		subs := client.subMap
-		for _, sub := range subs {
-			subInfo.Topics = append(subInfo.Topics, sub.topic)
-			subInfo.Qoss = append(subInfo.Qoss, sub.qos)
-		}
-
 		return true
 	})
 	if len(subInfo.Topics) > 0 {
-		if err := c.WriterPacket(subInfo); err != nil {
-			log.Error("Send localsubs To Router error", zap.Error(err))
+		err := c.WriterPacket(subInfo)
+		if err != nil {
+			log.Error("Send localsubs To Router error :", zap.Error(err))
 		}
 	}
 }

 func (b *Broker) BroadcastInfoMessage(remoteID string, msg *packets.PublishPacket) {
 	b.routes.Range(func(key, value interface{}) bool {
-		if r, ok := value.(*client); ok {
+		r, ok := value.(*client)
+		if ok {
 			if r.route.remoteID == remoteID {
 				return true
 			}
 			r.WriterPacket(msg)
 		}
 		return true
+
 	})
+	// log.Info("BroadcastInfoMessage success ")
 }

 func (b *Broker) BroadcastSubOrUnsubMessage(packet packets.ControlPacket) {

 	b.routes.Range(func(key, value interface{}) bool {
-		if r, ok := value.(*client); ok {
+		r, ok := value.(*client)
+		if ok {
 			r.WriterPacket(packet)
 		}
 		return true
 	})
+	// log.Info("BroadcastSubscribeMessage remotes: ", s.remotes)
 }

 func (b *Broker) removeClient(c *client) {
-	clientId := c.info.clientID
+	clientId := string(c.info.clientID)
 	typ := c.typ
 	switch typ {
 	case CLIENT:
@@ -668,6 +592,7 @@ func (b *Broker) removeClient(c *client) {
 	case REMOTE:
 		b.remotes.Delete(clientId)
 	}
+	// log.Info("delete client ,", clientId)
 }

 func (b *Broker) PublishMessage(packet *packets.PublishPacket) {
@@ -677,69 +602,38 @@ func (b *Broker) PublishMessage(packet *packets.PublishPacket) {
 	err := b.topicsMgr.Subscribers([]byte(packet.TopicName), packet.Qos, &subs, &qoss)
 	b.mu.Unlock()
 	if err != nil {
-		log.Error("search sub client error", zap.Error(err))
+		log.Error("search sub client error,  ", zap.Error(err))
 		return
 	}

 	for _, sub := range subs {
 		s, ok := sub.(*subscription)
 		if ok {
-			if err := s.client.WriterPacket(packet); err != nil {
-				log.Error("write message error", zap.Error(err))
+			err := s.client.WriterPacket(packet)
+			if err != nil {
+				log.Error("write message error,  ", zap.Error(err))
 			}
 		}
 	}
 }

-func (b *Broker) PublishMessageByClientId(packet *packets.PublishPacket, clientId string) error {
-	cli, loaded := b.clients.LoadAndDelete(clientId)
-	if !loaded {
-		return fmt.Errorf("clientId %s not connected", clientId)
-	}
-	conn, success := cli.(*client)
-	if !success {
-		return fmt.Errorf("clientId %s loaded fail", clientId)
-	}
-	return conn.WriterPacket(packet)
-}
-
-func (b *Broker) BroadcastUnSubscribe(topicsToUnSubscribeFrom []string) {
-	if len(topicsToUnSubscribeFrom) == 0 {
-		return
-	}
+func (b *Broker) BroadcastUnSubscribe(subs map[string]*subscription) {

 	unsub := packets.NewControlPacket(packets.Unsubscribe).(*packets.UnsubscribePacket)
-	unsub.Topics = append(unsub.Topics, topicsToUnSubscribeFrom...)
-	b.BroadcastSubOrUnsubMessage(unsub)
+	for topic, _ := range subs {
+		unsub.Topics = append(unsub.Topics, topic)
+	}
+
+	if len(unsub.Topics) > 0 {
+		b.BroadcastSubOrUnsubMessage(unsub)
+	}
 }

-type OnlineOfflineMsg struct {
-	ClientID	string		`json:"clientID"`
-	Online		bool		`json:"online"`
-	Timestamp	string		`json:"timestamp"`
-	ClientInfo	Info		`json:"info"`
-	LastMsgTime	int64		`json:"lastMsg"`
-}
-
-func (b *Broker) OnlineOfflineNotification(info Info, online bool, lastMsg int64) {
+func (b *Broker) OnlineOfflineNotification(clientID string, online bool) {
 	packet := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
-	packet.TopicName = "$SYS/broker/connection/clients/" + info.ClientID
+	packet.TopicName = "$SYS/broker/connection/clients/" + clientID
 	packet.Qos = 0
-
-	msg := OnlineOfflineMsg{
-		ClientID: info.ClientID,
-		Online: online,
-		Timestamp: time.Now().UTC().Format(time.RFC3339),
-		ClientInfo: info,
-		LastMsgTime: lastMsg,
-	}
-
-	if b, err := encJson.Marshal(msg); err != nil {
-		//This is a TERRIBLE situation, falling back to legacy format to not break API Contract
-		packet.Payload = []byte(fmt.Sprintf(`{"clientID":"%s","online":%v,"timestamp":"%s"}`, info.ClientID, online, time.Now().UTC().Format(time.RFC3339)))
-	} else {
-		packet.Payload = b
-	}
+	packet.Payload = []byte(fmt.Sprintf(`{"clientID":"%s","online":%v,"timestamp":"%s"}`, clientID, online, time.Now().UTC().Format(time.RFC3339)))

 	b.PublishMessage(packet)
 }
--- a/broker/client.go
+++ b/broker/client.go
@@ -1,7 +1,6 @@
 package broker

 import (
-	"bytes"
 	"context"
 	"errors"
 	"math/rand"
@@ -11,19 +10,17 @@ import (
 	"strings"
 	"sync"
 	"time"
-	"unicode/utf8"

-	"github.com/eapache/queue"
-	"github.com/eclipse/paho.mqtt.golang/packets"
 	"github.com/fhmq/hmq/broker/lib/sessions"
 	"github.com/fhmq/hmq/broker/lib/topics"
 	"github.com/fhmq/hmq/plugins/bridge"
+
+	"github.com/eclipse/paho.mqtt.golang/packets"
 	"go.uber.org/zap"
-	"golang.org/x/net/websocket"
 )

 const (
-	// BrokerInfoTopic special pub topic for cluster info
+	// special pub topic for cluster info BrokerInfoTopic
 	BrokerInfoTopic = "broker000100101info"
 	// CLIENT is an end user.
 	CLIENT = 0
@@ -43,57 +40,29 @@ const (
 	Disconnected = 2
 )

-const (
-	awaitRelTimeout int64 = 20
-	retryInterval   int64 = 20
-)
-
 var (
 	groupCompile = regexp.MustCompile(_GroupTopicRegexp)
 )

 type client struct {
-	typ            int
-	mu             sync.Mutex
-	broker         *Broker
-	conn           net.Conn
-	info           info
-	route          route
-	status         int
-	ctx            context.Context
-	cancelFunc     context.CancelFunc
-	session        *sessions.Session
-	subMap         map[string]*subscription
-	subMapMu       sync.RWMutex
-	topicsMgr      *topics.Manager
-	subs           []interface{}
-	qoss           []byte
-	rmsgs          []*packets.PublishPacket
-	routeSubMap    map[string]uint64
-	routeSubMapMu  sync.Mutex
-	awaitingRel    map[uint16]int64
-	awaitingRelMu  sync.RWMutex
-	maxAwaitingRel int
-	inflight       map[uint16]*inflightElem
-	inflightMu     sync.RWMutex
-	mqueue         *queue.Queue
-	retryTimer     *time.Timer
-	retryTimerLock sync.Mutex
-	lastMsgTime	int64
+	typ         int
+	mu          sync.Mutex
+	broker      *Broker
+	conn        net.Conn
+	info        info
+	route       route
+	status      int
+	ctx         context.Context
+	cancelFunc  context.CancelFunc
+	session     *sessions.Session
+	subMap      map[string]*subscription
+	topicsMgr   *topics.Manager
+	subs        []interface{}
+	qoss        []byte
+	rmsgs       []*packets.PublishPacket
+	routeSubMap map[string]uint64
 }

-type InflightStatus uint8
-
-const (
-	Publish InflightStatus = 0
-	Pubrel  InflightStatus = 1
-)
-
-type inflightElem struct {
-	status    InflightStatus
-	packet    *packets.PublishPacket
-	timestamp int64
-}
 type subscription struct {
 	client    *client
 	topic     string
@@ -112,49 +81,23 @@ type info struct {
 	remoteIP  string
 }

-type PubPacket struct {
-	TopicName	string			`json:"topicName"`
-	Payload		[]byte			`json:"payload"`
-}
-
-type Info struct {
-	ClientID  string			`json:"clientId"`
-	Username  string			`json:"username"`
-	Password  []byte			`json:"password"`
-	Keepalive uint16			`json:"keepalive"`
-	WillMsg   PubPacket			`json:"willMsg"`
-}
-
 type route struct {
 	remoteID  string
 	remoteUrl string
 }

 var (
-	DisconnectedPacket = packets.NewControlPacket(packets.Disconnect).(*packets.DisconnectPacket)
-	r                  = rand.New(rand.NewSource(time.Now().UnixNano()))
+	DisconnectdPacket = packets.NewControlPacket(packets.Disconnect).(*packets.DisconnectPacket)
+	r                 = rand.New(rand.NewSource(time.Now().UnixNano()))
 )

 func (c *client) init() {
-	c.lastMsgTime = time.Now().Unix()		//mark the connection packet time as last time messaged
 	c.status = Connected
 	c.info.localIP, _, _ = net.SplitHostPort(c.conn.LocalAddr().String())
-	remoteAddr := c.conn.RemoteAddr()
-	remoteNetwork := remoteAddr.Network()
-	c.info.remoteIP = ""
-	if remoteNetwork != "websocket" {
-		c.info.remoteIP, _, _ = net.SplitHostPort(remoteAddr.String())
-	} else {
-		ws := c.conn.(*websocket.Conn)
-		c.info.remoteIP, _, _ = net.SplitHostPort(ws.Request().RemoteAddr)
-	}
+	c.info.remoteIP, _, _ = net.SplitHostPort(c.conn.RemoteAddr().String())
 	c.ctx, c.cancelFunc = context.WithCancel(context.Background())
 	c.subMap = make(map[string]*subscription)
 	c.topicsMgr = c.broker.topicsMgr
-	c.routeSubMap = make(map[string]uint64)
-	c.awaitingRel = make(map[uint16]int64)
-	c.inflight = make(map[uint16]*inflightElem)
-	c.mqueue = queue.New()
 }

 func (c *client) readLoop() {
@@ -173,16 +116,14 @@ func (c *client) readLoop() {
 			return
 		default:
 			//add read timeout
-			if keepAlive > 0 {
-				if err := nc.SetReadDeadline(time.Now().Add(timeOut)); err != nil {
-					log.Error("set read timeout error: ", zap.Error(err), zap.String("ClientID", c.info.clientID))
-					msg := &Message{
-						client: c,
-						packet: DisconnectedPacket,
-					}
-					b.SubmitWork(c.info.clientID, msg)
-					return
+			if err := nc.SetReadDeadline(time.Now().Add(timeOut)); err != nil {
+				log.Error("set read timeout error: ", zap.Error(err), zap.String("ClientID", c.info.clientID))
+				msg := &Message{
+					client: c,
+					packet: DisconnectdPacket,
 				}
+				b.SubmitWork(c.info.clientID, msg)
+				return
 			}

 			packet, err := packets.ReadPacket(nc)
@@ -190,20 +131,12 @@ func (c *client) readLoop() {
 				log.Error("read packet error: ", zap.Error(err), zap.String("ClientID", c.info.clientID))
 				msg := &Message{
 					client: c,
-					packet: DisconnectedPacket,
+					packet: DisconnectdPacket,
 				}
 				b.SubmitWork(c.info.clientID, msg)
 				return
 			}

-			// if packet is disconnect from client, then need to break the read packet loop and clear will msg.
-			if _, isDisconnect := packet.(*packets.DisconnectPacket); isDisconnect {
-				c.info.willMsg = nil
-				c.cancelFunc()
-			} else {
-				c.lastMsgTime = time.Now().Unix()
-			}
-
 			msg := &Message{
 				client: c,
 				packet: packet,
@@ -214,63 +147,6 @@ func (c *client) readLoop() {

 }

-// extractPacketFields function reads a control packet and extracts only the fields
-// that needs to pass on UTF-8 validation
-func extractPacketFields(msgPacket packets.ControlPacket) []string {
-	var fields []string
-
-	// Get packet type
-	switch msgPacket.(type) {
-	case *packets.ConnackPacket:
-	case *packets.ConnectPacket:
-	case *packets.PublishPacket:
-		packet := msgPacket.(*packets.PublishPacket)
-		fields = append(fields, packet.TopicName)
-		break
-
-	case *packets.SubscribePacket:
-	case *packets.SubackPacket:
-	case *packets.UnsubscribePacket:
-		packet := msgPacket.(*packets.UnsubscribePacket)
-		fields = append(fields, packet.Topics...)
-		break
-	}
-
-	return fields
-}
-
-// validatePacketFields function checks if any of control packets fields has ill-formed
-// UTF-8 string
-func validatePacketFields(msgPacket packets.ControlPacket) (validFields bool) {
-
-	// Extract just fields that needs validation
-	fields := extractPacketFields(msgPacket)
-
-	for _, field := range fields {
-
-		// Perform the basic UTF-8 validation
-		if !utf8.ValidString(field) {
-			validFields = false
-			return
-		}
-
-		// A UTF-8 encoded string MUST NOT include an encoding of the null
-		// character U+0000
-		// If a receiver (Server or Client) receives a Control Packet containing U+0000
-		// it MUST close the Network Connection
-		// http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.pdf page 14
-		if bytes.ContainsAny([]byte(field), "\u0000") {
-			validFields = false
-			return
-		}
-	}
-
-	// All fields have been validated successfully
-	validFields = true
-
-	return
-}
-
 func ProcessMessage(msg *Message) {
 	c := msg.client
 	ca := msg.packet
@@ -282,77 +158,16 @@ func ProcessMessage(msg *Message) {
 		log.Debug("Recv message:", zap.String("message type", reflect.TypeOf(msg.packet).String()[9:]), zap.String("ClientID", c.info.clientID))
 	}

-	// Perform field validation
-	if !validatePacketFields(ca) {
-
-		// http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.pdf
-		// Page 14
-		//
-		// If a Server or Client receives a Control Packet
-		// containing ill-formed UTF-8 it MUST close the Network Connection
-
-		_ = c.conn.Close()
-
-		// Update client status
-		//c.status = Disconnected
-
-		log.Error("Client disconnected due to malformed packet", zap.String("ClientID", c.info.clientID))
-
-		return
-	}
-
 	switch ca.(type) {
 	case *packets.ConnackPacket:
 	case *packets.ConnectPacket:
 	case *packets.PublishPacket:
 		packet := ca.(*packets.PublishPacket)
-
 		c.ProcessPublish(packet)
 	case *packets.PubackPacket:
-		packet := ca.(*packets.PubackPacket)
-		c.inflightMu.Lock()
-		if _, found := c.inflight[packet.MessageID]; found {
-			delete(c.inflight, packet.MessageID)
-		} else {
-			log.Error("Duplicated PUBACK PacketId", zap.Uint16("MessageID", packet.MessageID))
-		}
-		c.inflightMu.Unlock()
 	case *packets.PubrecPacket:
-		packet := ca.(*packets.PubrecPacket)
-		c.inflightMu.RLock()
-		ielem, found := c.inflight[packet.MessageID]
-		c.inflightMu.RUnlock()
-		if found {
-			if ielem.status == Publish {
-				ielem.status = Pubrel
-				ielem.timestamp = time.Now().Unix()
-			} else if ielem.status == Pubrel {
-				log.Error("Duplicated PUBREC PacketId", zap.Uint16("MessageID", packet.MessageID))
-			}
-		} else {
-			log.Error("The PUBREC PacketId is not found.", zap.Uint16("MessageID", packet.MessageID))
-		}
-
-		pubrel := packets.NewControlPacket(packets.Pubrel).(*packets.PubrelPacket)
-		pubrel.MessageID = packet.MessageID
-		if err := c.WriterPacket(pubrel); err != nil {
-			log.Error("send pubrel error, ", zap.Error(err), zap.String("ClientID", c.info.clientID))
-			return
-		}
 	case *packets.PubrelPacket:
-		packet := ca.(*packets.PubrelPacket)
-		_ = c.pubRel(packet.MessageID)
-		pubcomp := packets.NewControlPacket(packets.Pubcomp).(*packets.PubcompPacket)
-		pubcomp.MessageID = packet.MessageID
-		if err := c.WriterPacket(pubcomp); err != nil {
-			log.Error("send pubcomp error, ", zap.Error(err), zap.String("ClientID", c.info.clientID))
-			return
-		}
 	case *packets.PubcompPacket:
-		packet := ca.(*packets.PubcompPacket)
-		c.inflightMu.Lock()
-		delete(c.inflight, packet.MessageID)
-		c.inflightMu.Unlock()
 	case *packets.SubscribePacket:
 		packet := ca.(*packets.SubscribePacket)
 		c.ProcessSubscribe(packet)
@@ -430,8 +245,8 @@ func (c *client) processClientPublish(packet *packets.PublishPacket) {
 		return
 	}

-	//publish to bridge mq
-	cost := c.broker.Publish(&bridge.Elements{
+	//publish kafka
+	c.broker.Publish(&bridge.Elements{
 		ClientID:  c.info.clientID,
 		Username:  c.info.username,
 		Action:    bridge.Publish,
@@ -440,10 +255,6 @@ func (c *client) processClientPublish(packet *packets.PublishPacket) {
 		Topic:     topic,
 	})

-	if cost {
-		return
-	}
-
 	switch packet.Qos {
 	case QosAtMostOnce:
 		c.ProcessPublishMessage(packet)
@@ -456,17 +267,6 @@ func (c *client) processClientPublish(packet *packets.PublishPacket) {
 		}
 		c.ProcessPublishMessage(packet)
 	case QosExactlyOnce:
-		if err := c.registerPublishPacketId(packet.MessageID); err != nil {
-			return
-		} else {
-			pubrec := packets.NewControlPacket(packets.Pubrec).(*packets.PubrecPacket)
-			pubrec.MessageID = packet.MessageID
-			if err := c.WriterPacket(pubrec); err != nil {
-				log.Error("send pubrec error, ", zap.Error(err), zap.String("ClientID", c.info.clientID))
-				return
-			}
-			c.ProcessPublishMessage(packet)
-		}
 		return
 	default:
 		log.Error("publish with unknown qos", zap.String("ClientID", c.info.clientID))
@@ -495,6 +295,7 @@ func (c *client) ProcessPublishMessage(packet *packets.PublishPacket) {
 		return
 	}

+	// fmt.Println("psubs num: ", len(c.subs))
 	if len(c.subs) == 0 {
 		return
 	}
@@ -531,8 +332,6 @@ func (c *client) ProcessSubscribe(packet *packets.SubscribePacket) {
 	case CLIENT:
 		c.processClientSubscribe(packet)
 	case ROUTER:
-		fallthrough
-	case REMOTE:
 		c.processRouterSubscribe(packet)
 	}
 }
@@ -546,15 +345,14 @@ func (c *client) processClientSubscribe(packet *packets.SubscribePacket) {
 	if b == nil {
 		return
 	}
-
-	subTopics := packet.Topics
+	topics := packet.Topics
 	qoss := packet.Qoss

 	suback := packets.NewControlPacket(packets.Suback).(*packets.SubackPacket)
 	suback.MessageID = packet.MessageID
 	var retcodes []byte

-	for i, topic := range subTopics {
+	for i, topic := range topics {
 		t := topic
 		//check topic auth for client
 		if !b.CheckTopicAuth(SUB, c.info.clientID, c.info.username, c.info.remoteIP, topic) {
@@ -584,12 +382,10 @@ func (c *client) processClientSubscribe(packet *packets.SubscribePacket) {
 			topic = substr[2]
 		}

-		c.subMapMu.Lock()
 		if oldSub, exist := c.subMap[t]; exist {
-			_ = c.topicsMgr.Unsubscribe([]byte(oldSub.topic), oldSub)
+			c.topicsMgr.Unsubscribe([]byte(oldSub.topic), oldSub)
 			delete(c.subMap, t)
 		}
-		c.subMapMu.Unlock()

 		sub := &subscription{
 			topic:     topic,
@@ -606,13 +402,12 @@ func (c *client) processClientSubscribe(packet *packets.SubscribePacket) {
 			continue
 		}

-		c.subMapMu.Lock()
 		c.subMap[t] = sub
-		c.subMapMu.Unlock()

-		_ = c.session.AddTopic(t, qoss[i])
+		c.session.AddTopic(t, qoss[i])
 		retcodes = append(retcodes, rqos)
-		_ = c.topicsMgr.Retained([]byte(topic), &c.rmsgs)
+		c.topicsMgr.Retained([]byte(topic), &c.rmsgs)
+
 	}

 	suback.ReturnCodes = retcodes
@@ -644,15 +439,14 @@ func (c *client) processRouterSubscribe(packet *packets.SubscribePacket) {
 	if b == nil {
 		return
 	}
-
-	subTopics := packet.Topics
+	topics := packet.Topics
 	qoss := packet.Qoss

 	suback := packets.NewControlPacket(packets.Suback).(*packets.SubackPacket)
 	suback.MessageID = packet.MessageID
 	var retcodes []byte

-	for i, topic := range subTopics {
+	for i, topic := range topics {
 		t := topic
 		groupName := ""
 		share := false
@@ -682,13 +476,8 @@ func (c *client) processRouterSubscribe(packet *packets.SubscribePacket) {
 			continue
 		}

-		c.subMapMu.Lock()
 		c.subMap[t] = sub
-		c.subMapMu.Unlock()
-
-		c.routeSubMapMu.Lock()
 		addSubMap(c.routeSubMap, topic)
-		c.routeSubMapMu.Unlock()
 		retcodes = append(retcodes, rqos)
 	}

@@ -718,24 +507,20 @@ func (c *client) processRouterUnSubscribe(packet *packets.UnsubscribePacket) {
 	if b == nil {
 		return
 	}
+	topics := packet.Topics

-	unSubTopics := packet.Topics
-
-	for _, topic := range unSubTopics {
-		c.subMapMu.Lock()
-		if sub, exist := c.subMap[topic]; exist {
-			c.routeSubMapMu.Lock()
-			if retainNum := delSubMap(c.routeSubMap, topic); retainNum > 0 {
-				c.routeSubMapMu.Unlock()
-				c.subMapMu.Unlock()
+	for _, topic := range topics {
+		sub, exist := c.subMap[topic]
+		if exist {
+			retainNum := delSubMap(c.routeSubMap, topic)
+			if retainNum > 0 {
 				continue
 			}
-			c.routeSubMapMu.Unlock()

-			_ = c.topicsMgr.Unsubscribe([]byte(sub.topic), sub)
+			c.topicsMgr.Unsubscribe([]byte(sub.topic), sub)
 			delete(c.subMap, topic)
 		}
-		c.subMapMu.Unlock()
+
 	}

 	unsuback := packets.NewControlPacket(packets.Unsuback).(*packets.UnsubackPacket)
@@ -756,10 +541,9 @@ func (c *client) processClientUnSubscribe(packet *packets.UnsubscribePacket) {
 	if b == nil {
 		return
 	}
+	topics := packet.Topics

-	unSubTopics := packet.Topics
-
-	for _, topic := range unSubTopics {
+	for _, topic := range topics {
 		{
 			//publish kafka

@@ -773,14 +557,12 @@ func (c *client) processClientUnSubscribe(packet *packets.UnsubscribePacket) {

 		}

-		c.subMapMu.Lock()
 		sub, exist := c.subMap[topic]
 		if exist {
-			_ = c.topicsMgr.Unsubscribe([]byte(sub.topic), sub)
-			_ = c.session.RemoveTopic(topic)
+			c.topicsMgr.Unsubscribe([]byte(sub.topic), sub)
+			c.session.RemoveTopic(topic)
 			delete(c.subMap, topic)
 		}
-		c.subMapMu.Unlock()

 	}

@@ -828,76 +610,44 @@ func (c *client) Close() {
 		Timestamp: time.Now().Unix(),
 	})

-	if c.mu.Lock(); c.conn != nil {
-		_ = c.conn.Close()
+	if c.conn != nil {
+		c.conn.Close()
 		c.conn = nil
-		c.mu.Unlock()
 	}

-	if b == nil {
-		return
-	}
+	subs := c.subMap

-	b.removeClient(c)
-
-	c.subMapMu.RLock()
-	defer c.subMapMu.RUnlock()
-
-	unSubTopics := make([]string, 0)
-	for topic, sub := range c.subMap {
-		unSubTopics = append(unSubTopics, topic)
-
-		// guard against race condition where a client gets Close() but wasn't initialized yet fully
-		if sub == nil || b.topicsMgr == nil {
-			continue
+	if b != nil {
+		b.removeClient(c)
+		for _, sub := range subs {
+			err := b.topicsMgr.Unsubscribe([]byte(sub.topic), sub)
+			if err != nil {
+				log.Error("unsubscribe error, ", zap.Error(err), zap.String("ClientID", c.info.clientID))
+			}
 		}

-		if err := b.topicsMgr.Unsubscribe([]byte(sub.topic), sub); err != nil {
-			log.Error("unsubscribe error, ", zap.Error(err), zap.String("ClientID", c.info.clientID))
+		if c.typ == CLIENT {
+			b.BroadcastUnSubscribe(subs)
+			//offline notification
+			b.OnlineOfflineNotification(c.info.clientID, false)
 		}
-	}

-	if c.typ == CLIENT {
-		b.BroadcastUnSubscribe(unSubTopics)
-
-		var pubPack = PubPacket{}
 		if c.info.willMsg != nil {
-			pubPack.TopicName = c.info.willMsg.TopicName
-			pubPack.Payload = c.info.willMsg.Payload
+			b.PublishMessage(c.info.willMsg)
 		}

-		pubInfo := Info{
-			ClientID: c.info.clientID,
-			Username: c.info.username,
-			Password: c.info.password,
-			Keepalive: c.info.keepalive,
-			WillMsg: pubPack,
+		if c.typ == CLUSTER {
+			b.ConnectToDiscovery()
 		}
-		//offline notification
-		b.OnlineOfflineNotification(pubInfo, false, c.lastMsgTime)
-	}

-	if c.info.willMsg != nil {
-		b.PublishMessage(c.info.willMsg)
+		//do reconnect
+		if c.typ == REMOTE {
+			go b.connectRouter(c.route.remoteID, c.route.remoteUrl)
+		}
 	}
-
-	if c.typ == CLUSTER {
-		b.ConnectToDiscovery()
-	}
-
-	//do reconnect
-	if c.typ == REMOTE {
-		go b.connectRouter(c.route.remoteID, c.route.remoteUrl)
-	}
-
 }

 func (c *client) WriterPacket(packet packets.ControlPacket) error {
-	defer func() {
-		if err := recover(); err != nil {
-			log.Error("recover error, ", zap.Any("recover", err))
-		}
-	}()
 	if c.status == Disconnected {
 		return nil
 	}
@@ -911,61 +661,7 @@ func (c *client) WriterPacket(packet packets.ControlPacket) error {
 	}

 	c.mu.Lock()
-	defer c.mu.Unlock()
-	return packet.Write(c.conn)
-}
-
-func (c *client) registerPublishPacketId(packetId uint16) error {
-	if c.isAwaitingFull() {
-		log.Error("Dropped qos2 packet for too many awaiting_rel", zap.Uint16("id", packetId))
-		return errors.New("DROPPED_QOS2_PACKET_FOR_TOO_MANY_AWAITING_REL")
-	}
-
-	c.awaitingRelMu.Lock()
-	defer c.awaitingRelMu.Unlock()
-	if _, found := c.awaitingRel[packetId]; found {
-		return errors.New("RC_PACKET_IDENTIFIER_IN_USE")
-	}
-	c.awaitingRel[packetId] = time.Now().Unix()
-	time.AfterFunc(time.Duration(awaitRelTimeout)*time.Second, c.expireAwaitingRel)
-	return nil
-}
-
-func (c *client) isAwaitingFull() bool {
-	c.awaitingRelMu.RLock()
-	defer c.awaitingRelMu.RUnlock()
-	if c.maxAwaitingRel == 0 {
-		return false
-	}
-	if len(c.awaitingRel) < c.maxAwaitingRel {
-		return false
-	}
-	return true
-}
-
-func (c *client) expireAwaitingRel() {
-	c.awaitingRelMu.Lock()
-	defer c.awaitingRelMu.Unlock()
-	if len(c.awaitingRel) == 0 {
-		return
-	}
-	now := time.Now().Unix()
-	for packetId, Timestamp := range c.awaitingRel {
-		if now-Timestamp >= awaitRelTimeout {
-			log.Error("Dropped qos2 packet for await_rel_timeout", zap.Uint16("id", packetId))
-			delete(c.awaitingRel, packetId)
-		}
-	}
-}
-
-func (c *client) pubRel(packetId uint16) error {
-	c.awaitingRelMu.Lock()
-	defer c.awaitingRelMu.Unlock()
-	if _, found := c.awaitingRel[packetId]; found {
-		delete(c.awaitingRel, packetId)
-	} else {
-		log.Error("The PUBREL PacketId is not found", zap.Uint16("id", packetId))
-		return errors.New("RC_PACKET_IDENTIFIER_NOT_FOUND")
-	}
-	return nil
+	err := packet.Write(c.conn)
+	c.mu.Unlock()
+	return err
 }
--- a/broker/comm.go
+++ b/broker/comm.go
@@ -1,14 +1,15 @@
 package broker

 import (
+	"encoding/json"
 	"reflect"
 	"time"

-	jsoniter "github.com/json-iterator/go"
+	"github.com/tidwall/gjson"
 	"go.uber.org/zap"

 	"github.com/eclipse/paho.mqtt.golang/packets"
-	uuid "github.com/google/uuid"
+	uuid "github.com/satori/go.uuid"
 )

 const (
@@ -113,11 +114,7 @@ func delSubMap(m map[string]uint64, topic string) uint64 {
 }

 func GenUniqueId() string {
-	id, err := uuid.NewRandom()
-	if err != nil {
-		log.Error("uuid.NewRandom() returned an error: " + err.Error())
-	}
-	return id.String()
+	return uuid.NewV4().String()
 }

 func wrapPublishPacket(packet *packets.PublishPacket) *packets.PublishPacket {
@@ -133,108 +130,26 @@ func wrapPublishPacket(packet *packets.PublishPacket) *packets.PublishPacket {

 func unWrapPublishPacket(packet *packets.PublishPacket) *packets.PublishPacket {
 	p := packet.Copy()
-	if payload := jsoniter.Get(p.Payload, "payload").ToString(); payload != "" {
-		p.Payload = []byte(payload)
+	if gjson.GetBytes(p.Payload, "payload").Exists() {
+		p.Payload = []byte(gjson.GetBytes(p.Payload, "payload").String())
 	}
 	return p
 }

 func publish(sub *subscription, packet *packets.PublishPacket) {
-	switch packet.Qos {
-	case QosAtMostOnce:
-		err := sub.client.WriterPacket(packet)
-		if err != nil {
-			log.Error("process message for psub error,  ", zap.Error(err))
-		}
-	case QosAtLeastOnce, QosExactlyOnce:
-		sub.client.inflightMu.Lock()
-		sub.client.inflight[packet.MessageID] = &inflightElem{status: Publish, packet: packet, timestamp: time.Now().Unix()}
-		sub.client.inflightMu.Unlock()
-		err := sub.client.WriterPacket(packet)
-		if err != nil {
-			log.Error("process message for psub error,  ", zap.Error(err))
-		}
-		sub.client.ensureRetryTimer()
-	default:
-		log.Error("publish with unknown qos", zap.String("ClientID", sub.client.info.clientID))
-		return
+	// var p *packets.PublishPacket
+	// if sub.client.info.username != "root" {
+	// 	p = unWrapPublishPacket(packet)
+	// } else {
+	// 	p = wrapPublishPacket(packet)
+	// }
+	// err := sub.client.WriterPacket(p)
+	// if err != nil {
+	// 	log.Error("process message for psub error,  ", zap.Error(err))
+	// }
+
+	err := sub.client.WriterPacket(packet)
+	if err != nil {
+		log.Error("process message for psub error,  ", zap.Error(err))
 	}
 }
-
-// timer for retry delivery
-func (c *client) ensureRetryTimer(interval ...int64) {
-
-	c.retryTimerLock.Lock()
-	defer c.retryTimerLock.Unlock()
-
-	if c.retryTimer != nil {
-		return
-	}
-
-	if len(interval) > 1 {
-		return
-	}
-	timerInterval := retryInterval
-	if len(interval) == 1 {
-		timerInterval = interval[0]
-	}
-
-	c.retryTimer = time.AfterFunc(time.Duration(timerInterval)*time.Second, c.retryDelivery)
-
-	return
-}
-
-func (c *client) resetRetryTimer() {
-	// lock mutex before reading retryTimer
-	c.retryTimerLock.Lock()
-	defer c.retryTimerLock.Unlock()
-
-	if c.retryTimer == nil {
-		return
-	}
-
-	// reset timer
-	c.retryTimer = nil
-}
-
-func (c *client) retryDelivery() {
-	c.resetRetryTimer()
-	c.inflightMu.RLock()
-	ilen := len(c.inflight)
-
-	if c.mu.Lock(); c.conn == nil || ilen == 0 { //Reset timer when client offline OR inflight is empty
-		c.inflightMu.RUnlock()
-		c.mu.Unlock()
-		return
-	}
-
-	// copy the to be retried elements out of the map to only hold the lock for a short time and use the new slice later to iterate
-	// through them
-	toRetryEle := make([]*inflightElem, 0, ilen)
-	for _, infEle := range c.inflight {
-		toRetryEle = append(toRetryEle, infEle)
-	}
-	c.inflightMu.RUnlock()
-	now := time.Now().Unix()
-
-	for _, infEle := range toRetryEle {
-		age := now - infEle.timestamp
-		if age >= retryInterval {
-			if infEle.status == Publish {
-				c.WriterPacket(infEle.packet)
-				infEle.timestamp = now
-			} else if infEle.status == Pubrel {
-				pubrel := packets.NewControlPacket(packets.Pubrel).(*packets.PubrelPacket)
-				pubrel.MessageID = infEle.packet.MessageID
-				c.WriterPacket(pubrel)
-				infEle.timestamp = now
-			}
-		} else {
-			if age < 0 {
-				age = 0
-			}
-			c.ensureRetryTimer(retryInterval - age)
-		}
-	}
-	c.ensureRetryTimer()
-}
--- a/broker/config.go
+++ b/broker/config.go
@@ -3,6 +3,7 @@ package broker
 import (
 	"crypto/tls"
 	"crypto/x509"
+	"encoding/json"
 	"errors"
 	"flag"
 	"fmt"
@@ -10,14 +11,9 @@ import (
 	"os"

 	"github.com/fhmq/hmq/logger"
-	"github.com/fhmq/hmq/plugins/auth"
-	"github.com/fhmq/hmq/plugins/bridge"
-	jsoniter "github.com/json-iterator/go"
 	"go.uber.org/zap"
 )

-var json = jsoniter.ConfigCompatibleWithStandardLibrary
-
 type Config struct {
 	Worker   int       `json:"workerNum"`
 	HTTPPort string    `json:"httpPort"`
@@ -36,11 +32,6 @@ type Config struct {
 }

 type Plugins struct {
-	Auth   auth.Auth
-	Bridge bridge.BridgeMQ
-}
-
-type NamedPlugins struct {
 	Auth   string
 	Bridge string
 }
@@ -161,17 +152,6 @@ func LoadConfig(filename string) (*Config, error) {
 	return &config, nil
 }

-func (p *Plugins) UnmarshalJSON(b []byte) error {
-	var named NamedPlugins
-	err := json.Unmarshal(b, &named)
-	if err != nil {
-		return err
-	}
-	p.Auth = auth.NewAuth(named.Auth)
-	p.Bridge = bridge.NewBridgeMQ(named.Bridge)
-	return nil
-}
-
 func (config *Config) check() error {

 	if config.Worker == 0 {
@@ -236,7 +216,7 @@ func NewTLSConfig(tlsInfo TLSInfo) (*tls.Config, error) {
 			return nil, err
 		}
 		pool := x509.NewCertPool()
-		ok := pool.AppendCertsFromPEM(rootPEM)
+		ok := pool.AppendCertsFromPEM([]byte(rootPEM))
 		if !ok {
 			return nil, fmt.Errorf("failed to parse root ca certificate")
 		}
--- a/broker/http.go
+++ b/broker/http.go
@@ -4,61 +4,22 @@ import (
 	"github.com/gin-gonic/gin"
 )

-const (
-	CONNECTIONS	= "api/v1/connections"
-)
-
-type ConnClient struct {
-	Info				`json:"info"`
-	LastMsgTime	int64		`json:"lastMsg"`
-}
-
-type resp struct {
-	Code	int		`json:"code,omitempty"`
-	Clients	[]ConnClient	`json:"clients,omitempty"`
-}
-
 func InitHTTPMoniter(b *Broker) {
 	gin.SetMode(gin.ReleaseMode)
 	router := gin.Default()
-	router.DELETE(CONNECTIONS + "/:clientid", func(c *gin.Context) {
+	router.DELETE("api/v1/connections/:clientid", func(c *gin.Context) {
 		clientid := c.Param("clientid")
 		cli, ok := b.clients.Load(clientid)
 		if ok {
-			conn, success := cli.(*client)
-			if success {
+			conn, succss := cli.(*client)
+			if succss {
 				conn.Close()
 			}
 		}
-		r := resp{Code: 0}
-		c.JSON(200, &r)
-	})
-	router.GET(CONNECTIONS, func(c *gin.Context) {
-		conns := make([]ConnClient, 0)
-		b.clients.Range(func (k, v interface{}) bool {
-			cl, _ := v.(*client)
-			var pubPack = PubPacket{}
-			if cl.info.willMsg != nil {
-				pubPack.TopicName = cl.info.willMsg.TopicName
-				pubPack.Payload = cl.info.willMsg.Payload
-			}
-
-			msg := ConnClient{
-				Info: Info{
-					ClientID: cl.info.clientID,
-					Username: cl.info.username,
-					Password: cl.info.password,
-					Keepalive: cl.info.keepalive,
-					WillMsg: pubPack,
-				},
-				LastMsgTime: cl.lastMsgTime,
-			}
-
-			conns = append(conns, msg)
-			return true
-		})
-		r := resp{Clients: conns}
-		c.JSON(200, &r)
+		resp := map[string]int{
+			"code": 0,
+		}
+		c.JSON(200, &resp)
 	})

 	router.Run(":" + b.config.HTTPPort)
--- a/broker/info.go
+++ b/broker/info.go
@@ -15,7 +15,7 @@ func (c *client) SendInfo() {
 	}
 	url := c.info.localIP + ":" + c.broker.config.Cluster.Port

-	infoMsg := NewInfo(c.broker.id, url)
+	infoMsg := NewInfo(c.broker.id, url, false)
 	err := c.WriterPacket(infoMsg)
 	if err != nil {
 		log.Error("send info message error, ", zap.Error(err))
@@ -46,8 +46,6 @@ func (c *client) SendConnect() {
 		return
 	}
 	m := packets.NewControlPacket(packets.Connect).(*packets.ConnectPacket)
-	m.ProtocolName = "MQIsdp"
-	m.ProtocolVersion = 3

 	m.CleanSession = true
 	m.ClientIdentifier = c.info.clientID
@@ -60,12 +58,13 @@ func (c *client) SendConnect() {
 	log.Info("send connect success")
 }

-func NewInfo(sid, url string) *packets.PublishPacket {
+func NewInfo(sid, url string, isforword bool) *packets.PublishPacket {
 	pub := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
 	pub.Qos = 0
 	pub.TopicName = BrokerInfoTopic
 	pub.Retain = false
 	info := fmt.Sprintf(`{"brokerID":"%s","brokerUrl":"%s"}`, sid, url)
+	// log.Info("new info", string(info))
 	pub.Payload = []byte(info)
 	return pub
 }
--- a/broker/lib/sessions/session.go
+++ b/broker/lib/sessions/session.go
@@ -55,7 +55,7 @@ func (this *Session) Init(msg *packets.ConnectPacket) error {

 	this.topics = make(map[string]byte, 1)

-	this.id = msg.ClientIdentifier
+	this.id = string(msg.ClientIdentifier)

 	this.initted = true

--- a/broker/lib/topics/memtopics.go
+++ b/broker/lib/topics/memtopics.go
@@ -78,7 +78,7 @@ func (this *memTopics) Unsubscribe(topic []byte, sub interface{}) error {
 	return this.sroot.sremove(topic, sub)
 }

-// Subscribers Returned values will be invalidated by the next Subscribers call
+// Returned values will be invalidated by the next Subscribers call
 func (this *memTopics) Subscribers(topic []byte, qos byte, subs *[]interface{}, qoss *[]byte) error {
 	if !ValidQos(qos) {
 		return fmt.Errorf("Invalid QoS %d", qos)
--- a/broker/session.go
+++ b/broker/session.go
--- a/conf/hmq.config
+++ b/conf/hmq.config
@@ -2,11 +2,13 @@
 	"workerNum": 4096,
 	"port": "1883",
 	"host": "0.0.0.0",
+	"debug": true,
 	"cluster": {
 		"host": "0.0.0.0",
 		"port": "1993"
 	},
 	"httpPort": "8080",
+	"router": "127.0.0.1:9888",
 	"tlsPort": "8883",
 	"tlsHost": "0.0.0.0",
 	"wsPort": "1888",
@@ -19,7 +21,7 @@
 		"keyFile": "ssl/server/key.pem"
 	},
 	"plugins": {
-		"auth": "mock",
-		"bridge": "csvlog"
+		"auth": "authhttp",
+		"bridge": "kafka"
 	}
 }
--- a/deploy/deploy.yaml
+++ b/deploy/deploy.yaml
@@ -14,7 +14,7 @@ spec:
    spec:
      containers:
        - name: mqtt-broker
-          image: hmq:v0.1.0
+          image: uhub.service.ucloud.cn/uiot_core_hub/hmq:v0.1.0
          ports:
            - containerPort: 1883
            - containerPort: 8080
--- a/go.mod
+++ b/go.mod
@@ -1,64 +1,27 @@
 module github.com/fhmq/hmq

-go 1.19
+go 1.12

 require (
-	github.com/Shopify/sarama v1.38.1
+	github.com/Shopify/sarama v1.26.1
 	github.com/bitly/go-simplejson v0.5.0
-	github.com/cespare/xxhash/v2 v2.1.2
-	github.com/eapache/queue v1.1.0
-	github.com/eclipse/paho.mqtt.golang v1.4.2
-	github.com/gin-gonic/gin v1.9.1
-	github.com/google/uuid v1.3.0
-	github.com/json-iterator/go v1.1.12
-	github.com/patrickmn/go-cache v2.1.0+incompatible
-	github.com/stretchr/testify v1.8.3
-	go.uber.org/zap v1.24.0
-	golang.org/x/net v0.17.0
-)
-
-require (
 	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
-	github.com/bytedance/sonic v1.9.1 // indirect
-	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/eapache/go-resiliency v1.3.0 // indirect
-	github.com/eapache/go-xerial-snappy v0.0.0-20230111030713-bf00bc1b83b6 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.2 // indirect
-	github.com/gin-contrib/sse v0.1.0 // indirect
-	github.com/go-playground/locales v0.14.1 // indirect
-	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-playground/validator/v10 v10.14.0 // indirect
-	github.com/goccy/go-json v0.10.2 // indirect
-	github.com/golang/snappy v0.0.4 // indirect
-	github.com/hashicorp/errwrap v1.1.0 // indirect
-	github.com/hashicorp/go-multierror v1.1.1 // indirect
-	github.com/hashicorp/go-uuid v1.0.3 // indirect
-	github.com/jcmturner/aescts/v2 v2.0.0 // indirect
-	github.com/jcmturner/dnsutils/v2 v2.0.0 // indirect
-	github.com/jcmturner/gofork v1.7.6 // indirect
-	github.com/jcmturner/gokrb5/v8 v8.4.3 // indirect
-	github.com/jcmturner/rpc/v2 v2.0.3 // indirect
-	github.com/klauspost/compress v1.15.15 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.4 // indirect
-	github.com/kr/text v0.2.0 // indirect
-	github.com/leodido/go-urn v1.2.4 // indirect
-	github.com/mattn/go-isatty v0.0.19 // indirect
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v1.0.2 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
-	github.com/pierrec/lz4/v4 v4.1.17 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect
-	github.com/rogpeppe/go-internal v1.10.0 // indirect
-	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
-	github.com/ugorji/go/codec v1.2.11 // indirect
-	go.uber.org/atomic v1.10.0 // indirect
-	go.uber.org/multierr v1.9.0 // indirect
-	golang.org/x/arch v0.3.0 // indirect
-	golang.org/x/crypto v0.14.0 // indirect
-	golang.org/x/sys v0.13.0 // indirect
-	golang.org/x/text v0.13.0 // indirect
-	google.golang.org/protobuf v1.30.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
+	github.com/eclipse/paho.mqtt.golang v1.2.0
+	github.com/gin-gonic/gin v1.4.0
+	github.com/golang/protobuf v1.3.2 // indirect
+	github.com/kr/pretty v0.1.0 // indirect
+	github.com/patrickmn/go-cache v2.1.0+incompatible
+	github.com/pkg/errors v0.8.1 // indirect
+	github.com/satori/go.uuid v1.2.0
+	github.com/segmentio/fasthash v0.0.0-20180216231524-a72b379d632e
+	github.com/stretchr/testify v1.3.0
+	github.com/tidwall/gjson v1.3.0
+	go.uber.org/atomic v1.4.0 // indirect
+	go.uber.org/multierr v1.1.0 // indirect
+	go.uber.org/zap v1.10.0
+	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4 // indirect
+	golang.org/x/net v0.0.0-20190724013045-ca1201d0de80
+	golang.org/x/sys v0.0.0-20190730183949-1393eb018365 // indirect
+	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
+	gopkg.in/jcmturner/goidentity.v3 v3.0.0 // indirect
 )
--- a/go.sum
+++ b/go.sum
@@ -1,175 +1,119 @@
-github.com/Shopify/sarama v1.38.1 h1:lqqPUPQZ7zPqYlWpTh+LQ9bhYNu2xJL6k1SJN4WVe2A=
-github.com/Shopify/sarama v1.38.1/go.mod h1:iwv9a67Ha8VNa+TifujYoWGxWnu2kNVAQdSdZ4X2o5g=
-github.com/Shopify/toxiproxy/v2 v2.5.0 h1:i4LPT+qrSlKNtQf5QliVjdP08GyAH8+BUIc9gT0eahc=
-github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
+github.com/DataDog/zstd v1.3.6-0.20190409195224-796139022798 h1:2T/jmrHeTezcCM58lvEQXs0UpQJCo5SoGAcg+mbSTIg=
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 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
--- a/main.go
+++ b/main.go
@@ -1,30 +1,29 @@
 package main

 import (
+	"log"
 	"os"
 	"os/signal"
+	"runtime"

 	"github.com/fhmq/hmq/broker"
-	"github.com/fhmq/hmq/logger"
-	"go.uber.org/zap"
 )

-var log = logger.Get()
-
 func main() {
+	runtime.GOMAXPROCS(runtime.NumCPU())
 	config, err := broker.ConfigureConfig(os.Args[1:])
 	if err != nil {
-		log.Fatal("configure broker config error", zap.Error(err))
+		log.Fatal("configure broker config error: ", err)
 	}

 	b, err := broker.NewBroker(config)
 	if err != nil {
-		log.Fatal("New Broker error: ", zap.Error(err))
+		log.Fatal("New Broker error: ", err)
 	}
 	b.Start()

 	s := waitForSignal()
-	log.Info("signal received, broker closed.", zap.Any("signal", s))
+	log.Println("signal received, broker closed.", s)
 }

 func waitForSignal() os.Signal {
--- a/plugins/auth/authfile/acl.go
+++ b/plugins/auth/authfile/acl.go
@@ -19,5 +19,5 @@ func (a *aclAuth) CheckConnect(clientID, username, password string) bool {
 }

 func (a *aclAuth) CheckACL(action, clientID, username, ip, topic string) bool {
-	return checkTopicAuth(a.config, action, ip, username, clientID, topic)
+	return checkTopicAuth(a.config, action, username, ip, clientID, topic)
 }
--- a/plugins/auth/authfile/acl_test.go
+++ b/plugins/auth/authfile/acl_test.go
@@ -1,23 +0,0 @@
-//+build test
-
-package acl
-
-import (
-	"os"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestOrigAcls(t *testing.T) {
-	pwd, _ := os.Getwd()
-	os.Chdir("../../../")
-	aclOrig := Init()
-	os.Chdir(pwd)
-
-	// rule: allow      ip          127.0.0.1      2         $SYS/#
-	origAllowed := aclOrig.CheckACL(PUB, "dummyClientID", "dummyUser", "127.0.0.1", "$SYS/something")
-	assert.True(t, origAllowed)
-	origAllowed = aclOrig.CheckACL(SUB, "dummyClientID", "dummyUser", "127.0.0.1", "$SYS/something")
-	assert.False(t, origAllowed)
-}
--- a/plugins/auth/authfile/aclconfig.go
+++ b/plugins/auth/authfile/aclconfig.go
@@ -37,14 +37,14 @@ func AclConfigLoad(file string) (*ACLConfig, error) {
 		File: file,
 		Info: make([]*AuthInfo, 0, 4),
 	}
-	err := aclconifg.Parse()
+	err := aclconifg.Prase()
 	if err != nil {
 		return nil, err
 	}
 	return aclconifg, err
 }

-func (c *ACLConfig) Parse() error {
+func (c *ACLConfig) Prase() error {
 	f, err := os.Open(c.File)
 	defer f.Close()
 	if err != nil {
--- a/plugins/auth/authhttp/authhttp.go
+++ b/plugins/auth/authhttp/authhttp.go
@@ -56,7 +56,7 @@ func Init() *authHTTP {
 	return &authHTTP{client: httpClient}
 }

-// CheckConnect check mqtt connect
+//CheckAuth check mqtt connect
 func (a *authHTTP) CheckConnect(clientID, username, password string) bool {
 	action := "connect"
 	{
--- a/plugins/bridge/CSVLog.md
+++ b/plugins/bridge/CSVLog.md
@@ -1,50 +0,0 @@
-# CSVLog Plugin For HMQ
-This is a bridge implementation for HMQ that allows messages to be logged to a CSV file at runtime.
-
-It can be used for debugging/monitoring purposes, for integration with other systems/platforms, or as an audit trail of messages.
-
-The plugin allows you to define 0, 1, or more filters which determine which messages get bridged. Where no filters are defined the plugin bridges every message. Where one or more filters exist, the plugin applies  the filter/s and only brdiges messages that match the filter spec.
-
-The plugin allows you provide a filename for the output file, and also supports three special filenames {LOG},{STDOUT}, and {NULL}. {LOG} results in messages being bridged to the log, {STDOUT} bridges them to Std out, and {NULL} simply skips and returns without an error.
-
-## Configuration
-The configiration settings for CSVLog are defined by the struct csvBridgeConfig.
-```
-type csvBridgeConfig struct {
-	FileName          string   `json:"fileName"`
-	LogFileMaxSizeMB  int64    `json:"logFileMaxSizeMB"`
-	LogFileMaxFiles   int64    `json:"logFileMaxFiles"`
-	WriteIntervalSecs int64    `json:"writeIntervalSecs"`
-	CommandTopic      string   `json:"commandTopic"`
-	Filters           []string `json:"filters"`
-}
-```
-| Setting | Description |
-| ----------- | ----------- |
-| FileName | A complete filename for the output file, or {LOG} to send bridged messages to the log, {STDOUT} to send bridged messages to STDOUT, or {NULL} to not bridge anything at all |
-| LogFileMaxSizeMB | The size in megabytes at which the log file is rotated |
-| LogFileMaxFiles | The maximum number of rotated logfiles to retain before they're deleted |
-| WriteIntervalSecs | The delay before flushing any pending writes to the file |
-| CommandTopic | The name of a topic to which commands relating to CSVLog will be sent eg "bridge/CSVLOG/command" |
-| Filters | An array of filter specifications which are used to determine which messages are bridged, if there are no filters specified the filter is assumed to be "#" which bridges everything. Filters are specified the same way that topic acls are described|
-
-## Filters
-
-Filters use the same syntax as for ACL permissions.
-
-So a filter can name a specific topic..
-
-"animals/cats" will bridge messages sent to the "animals/cats" topic. 
-
-A filter can use the + or # wildcards so
-
-"animals/cats/+" will bridge messages sent to "animals/cats/breeds", "animals/cats/colours" but not "animals/cats/breeds/longhair"
-
-"animals/cats/#" will bridge messages sent to "animals/cats/breeds", "animals/cats/colours", "animals/cats/breeds/longhair", etc
-
-## Commands
-Currently two commands can be sent to the CSVLog bridge:
-
-ROTATEFILE - Triggers an immediate rotation of the log file
-
-REALOADCONFIG - Triggers a reload of the CSVLog config file
--- a/plugins/bridge/bridge.go
+++ b/plugins/bridge/bridge.go
@@ -32,21 +32,17 @@ type Elements struct {

 const (
 	//Kafka plugin name
-	Kafka  = "kafka"
-	CSVLog = "csvlog"
+	Kafka = "kafka"
 )

 type BridgeMQ interface {
-	// Publish return true to cost the message
-	Publish(e *Elements) (bool, error)
+	Publish(e *Elements) error
 }

 func NewBridgeMQ(name string) BridgeMQ {
 	switch name {
 	case Kafka:
 		return InitKafka()
-	case CSVLog:
-		return InitCSVLog()
 	default:
 		return &mockMQ{}
 	}
--- a/plugins/bridge/csvlog.go
+++ b/plugins/bridge/csvlog.go
@@ -1,414 +0,0 @@
-package bridge
-
-/*
-Copyright (c) 2021, Gary Barnett @thinkovation. Released under the Apache 2 License
-
-CSVLog is a bridge plugin for HMQ that implements CSV logging of messages. See CSVLog.md for more information
-
-*/
-
-import (
-	"encoding/csv"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"path/filepath"
-	"sort"
-	"strings"
-	"sync"
-	"time"
-
-	"go.uber.org/zap"
-)
-
-type csvBridgeConfig struct {
-	FileName          string   `json:"fileName"`
-	LogFileMaxSizeMB  int64    `json:"logFileMaxSizeMB"`
-	LogFileMaxFiles   int64    `json:"logFileMaxFiles"`
-	WriteIntervalSecs int64    `json:"writeIntervalSecs"`
-	CommandTopic      string   `json:"commandTopic"`
-	Filters           []string `json:"filters"`
-}
-
-type csvLog struct {
-	config  csvBridgeConfig
-	buffer  []string
-	msgchan chan (*Elements)
-
-	sync.RWMutex
-}
-
-// rotateLog performs a log rotation - copying the current logfile to the base file name plus a timestamp
-func (c *csvLog) rotateLog(withPrune bool) error {
-	c.Lock()
-	filename := c.config.FileName
-	c.Unlock()
-
-	basename := strings.TrimSuffix(filename, filepath.Ext(filename))
-	newpath := basename + time.Now().Format("-20060102T150405") + filepath.Ext(filename)
-	renameError := os.Rename(filename, newpath)
-	if renameError != nil {
-		return renameError
-	}
-	outfile, _ := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
-	outfile.Close()
-	// Whenever we rotate a logfile we prune
-	if withPrune {
-		c.logFilePrune()
-
-	}
-	return nil
-
-}
-
-// writeToLog takes an array of elements and writes them to the logfile (or to log or stdout) spefified in
-// the configuration
-func (c *csvLog) writeToLog(els []Elements) error {
-
-	c.RLock()
-	fname := c.config.FileName
-	c.RUnlock()
-	if fname == "" {
-		fname = "CSVLOG.CSV"
-	}
-
-	if fname == "{LOG}" {
-		for _, value := range els {
-			t := time.Unix(value.Timestamp, 0)
-			log.Info(t.Format("2006-01-02T15:04:05") + " " + value.ClientID + " " + value.Username + " " + value.Action + " " + value.Topic + " " + value.Payload)
-		}
-		return nil
-	}
-	if fname == "{STDOUT}" {
-		for _, value := range els {
-			t := time.Unix(value.Timestamp, 0)
-			fmt.Println(t.Format("2006-01-02T15:04:05") + " " + value.ClientID + " " + value.Username + " " + value.Action + " " + value.Topic + " " + value.Payload)
-		}
-		return nil
-	}
-
-	var mbsize int64
-	fileStat, fileStatErr := os.Stat(fname)
-	if fileStatErr != nil {
-		log.Warn("Could not get CSVLog info. Received Err " + fileStatErr.Error())
-		mbsize = 0
-	} else {
-		mbsize = fileStat.Size() / 1024 / 1024
-	}
-	if mbsize > c.config.LogFileMaxSizeMB && c.config.LogFileMaxSizeMB != 0 {
-		rotateErr := c.rotateLog(true)
-		if rotateErr != nil {
-			log.Warn("Unable to rotate outputfile")
-		}
-	}
-	outfile, outfileOpenError := os.OpenFile(fname, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
-	defer outfile.Close()
-	if outfileOpenError != nil {
-		log.Warn("Could not open CSV Log file to write")
-		return errors.New("Could not write to CSV Log File")
-	}
-
-	writer := csv.NewWriter(outfile)
-	defer writer.Flush()
-
-	for _, value := range els {
-		t := time.Unix(value.Timestamp, 0)
-		var outrow = []string{t.Format("2006-01-02T15:04:05"), value.ClientID, value.Username, value.Action, value.Topic, value.Payload}
-		writeOutRowError := writer.Write(outrow)
-		if writeOutRowError != nil {
-			log.Warn("Could not write msg to CSV Log")
-		}
-	}
-	return nil
-
-}
-
-// Worker should be invoked as a goroutine - It listens on the csvlog message channel for incoming messages
-// for performance we batch messages into an outqueue and write them in bulk when a timer expires
-func (c *csvLog) Worker() {
-	log.Info("Running CSVLog worker")
-	var outqueue []Elements
-
-	for true {
-		c.RLock()
-		waitInterval := c.config.WriteIntervalSecs
-		c.RUnlock()
-
-		timer := time.NewTimer(time.Second * time.Duration(waitInterval))
-
-		select {
-
-		case p := <-c.msgchan:
-			c.RLock()
-
-			oktopublish := false
-
-			// Check to see if any filters are defined. If there are none we assume we're logging everything
-			if len(c.config.Filters) != 0 {
-				// We pick up a Read lock here to parse the c.config.Filters string array
-				// as it's a read lock, and write locks will be rare
-				// it feels as if this will be fine.
-				// If there is contention, it _might_ make sense to quickly lock c, get
-				// the filters and release the lock, then process the filters with no locks
-				// but I think it's unlikely
-
-				for _, filt := range c.config.Filters {
-					if topicMatch(p.Topic, filt) {
-						oktopublish = true
-						break
-
-					}
-
-				}
-
-			} else {
-				oktopublish = true
-			}
-			if oktopublish {
-				var el Elements
-				el.Action = p.Action
-				el.ClientID = p.ClientID
-				el.Payload = p.Payload
-				el.Size = p.Size
-				el.Timestamp = p.Timestamp
-				el.Topic = p.Topic
-				el.Username = p.Username
-				outqueue = append(outqueue, el)
-			}
-			c.RUnlock()
-			break
-		case <-timer.C:
-			if len(outqueue) > 0 {
-				writeResult := c.writeToLog(outqueue)
-				if writeResult != nil {
-					log.Warn("Trouble writing to CSV Log")
-				}
-				outqueue = nil
-
-			}
-			break
-		}
-
-	}
-}
-
-// LoadCSVLogConfig loads the configuration file - it currently looks in
-// "./plugins/csvlog/csvlogconfig.json" (following the example of the default location of the kafka plugin config file)
-// if it doesn't find it there it looks in two further places - the current directory and
-// an "assets" folder under the current directory (This is for compatibility with a couple of deployed)
-// implementations.
-func LoadCSVLogConfig() csvBridgeConfig {
-	// Check to see if the CSVLOGCONFFILE environment variable is set and if so
-	// check that it does actually point to a file
-	csvLogConfigFile := os.Getenv("CSVLOGCONFFILE")
-	if csvLogConfigFile != "" {
-		if _, err := os.Stat(csvLogConfigFile); os.IsNotExist(err) {
-			csvLogConfigFile = ""
-		}
-	}
-	// If csvLogConfigFile is blank look in the plugins directory,
-	// then the current directory for the csvLogConfigFile. If it's still not found we use a default config
-	// If the file does not exist, we use default parameters
-	if csvLogConfigFile == "" {
-		csvLogConfigFile = "./plugins/csvlog/csvlogconfig.json"
-	}
-	if _, err := os.Stat(csvLogConfigFile); os.IsNotExist(err) {
-
-		if _, err := os.Stat("csvlogconfig.json"); os.IsNotExist(err) {
-			csvLogConfigFile = ""
-		} else {
-			csvLogConfigFile = "csvlogconfig.json"
-		}
-	}
-
-	var configUnmarshalErr error
-	var config csvBridgeConfig
-	if csvLogConfigFile != "" {
-		log.Info("Trying to load config file from " + csvLogConfigFile)
-		content, err := ioutil.ReadFile(csvLogConfigFile)
-		if err != nil {
-			log.Info("Read config file error: ", zap.Error(err))
-		}
-		configUnmarshalErr = json.Unmarshal(content, &config)
-	}
-
-	if configUnmarshalErr != nil || config.FileName == "" {
-		log.Warn("Unable to load csvlog config file, so using default settings")
-		config.FileName = "/var/log/csvlog.log"
-		config.CommandTopic = "CSVLOG/command"
-		config.WriteIntervalSecs = 10
-		config.LogFileMaxSizeMB = 1
-		config.LogFileMaxFiles = 4
-
-	}
-	return config
-
-}
-
-// InitCSVLog initialises a CSVLOG plugin
-// It does this by loading a config file if one can be found. The default filename follows the same
-// convention as the kafka plugin - ie it's in "./plugins/csvlog/csvlogconfig.json" but an
-// environment var - CSVLOGCONFFILE - can be set to provide a different location.
-//
-// Once the config is set the worker is started
-func InitCSVLog() *csvLog {
-	log.Info("Trying to init CSVLOG")
-
-	c := &csvLog{config: LoadCSVLogConfig()}
-	c.msgchan = make(chan *Elements, 200)
-	//Start the csvlog worker
-	go c.Worker()
-	return c
-
-}
-
-// topicMatch accepts a topic name and a filter string, it then evaluates the
-// topic against the filter string and returns true if there is a match.
-//
-// The CSV bridge can be configured with 0, 1 or more filters - Where there are no
-// filters specified, every message will be re-published. Where there are filters, any message
-// that passes any of the filter tests will be re-published.
-func topicMatch(topic string, filter string) bool {
-	if topic == filter || filter == "#" {
-		return true
-	}
-	topicComponents := strings.Split(topic, "/")
-	filterComponents := strings.Split(filter, "/")
-	currentpos := 0
-	filterComponentsLength := len(filterComponents)
-	currentFilterComponent := ""
-	if filterComponentsLength > 0 {
-		currentFilterComponent = filterComponents[currentpos]
-	}
-	for _, topicVal := range topicComponents {
-		if currentFilterComponent == "" {
-			return false
-		}
-		if currentFilterComponent == "#" {
-			return true
-		}
-		if currentFilterComponent != "+" && currentFilterComponent != topicVal {
-			return false
-		}
-		currentpos++
-		if filterComponentsLength > currentpos {
-			currentFilterComponent = filterComponents[currentpos]
-		} else {
-			currentFilterComponent = ""
-		}
-	}
-	return true
-}
-
-// logFilePrune checks the number of rotated logfiles and prunes them
-func (c *csvLog) logFilePrune() error {
-
-	// List the rotated files
-	c.RLock()
-	filename := c.config.FileName
-	maxfiles := c.config.LogFileMaxFiles
-	c.RUnlock()
-	if maxfiles == 0 {
-		return nil
-	}
-
-	fileExt := filepath.Ext(filename)
-	fileDir := filepath.Dir(filename)
-	baseFileName := strings.TrimSuffix(filepath.Base(filename), fileExt)
-
-	files, err := ioutil.ReadDir(fileDir)
-	if err != nil {
-		return err
-	}
-
-	var foundFiles []string
-	for _, file := range files {
-		if strings.HasPrefix(file.Name(), baseFileName+"-") {
-
-			foundFiles = append(foundFiles, file.Name())
-
-		}
-	}
-	if len(foundFiles) >= int(maxfiles) {
-		fmt.Println("Found ", len(foundFiles), " files")
-		sort.Strings(foundFiles)
-		for i := 0; i < len(foundFiles)-int(maxfiles); i++ {
-			fileDeleteError := os.Remove(fileDir + "//" + foundFiles[i])
-			log.Info("Pruning logfile " + fileDir + "//" + foundFiles[i])
-			if fileDeleteError != nil {
-				log.Warn("Could not delete file " + fileDir + "//" + foundFiles[i])
-
-			}
-
-		}
-
-	}
-
-	return nil
-
-}
-
-// Publish implements the bridge interface - it accepts an Element then checks to see if that element is a
-// message published to the admin topic for the plugin
-//
-func (c *csvLog) Publish(e *Elements) (bool, error) {
-	// A short-lived lock on c allows us to
-	// get the Command topic then release the lock
-	// This then allows us to process the command - which may
-	// take its a write lock on c (to update values) and then
-	// return here where we'll pick up a
-	// read lock to iterate over the c.config.filters
-	// We're trying to minimise the time spent in this function
-	// and to limit the overall time spent in any write locks.
-	c.RLock()
-	//CSVLOG allows you to configure a CommandTopic which is a topic to which commands affecting the behaviour of CSVLog can be sent
-	//The simplest would be a message with a payload of "RELOAD" which will reload the configuration allowing configuration changes to be
-	//made at runtime without restarting the broker
-	CommandTopic := c.config.CommandTopic
-	OutFile := c.config.FileName
-	c.RUnlock()
-	// If the outfile is set to "{NULL}" we don't do anything with the message - we just return nil
-	// This feature is here to allow CSVLOG to be enabled/disabled at runtime
-	if OutFile == "{NULL}" {
-		return false, nil
-	}
-
-	if e.Topic == CommandTopic {
-
-		log.Info("CSVLOG Command Received")
-
-		// Process Command
-		// These are going to be rare ocurrences, so in this implementation
-		// we will process the command here - but if we _really_ want to
-		// squeeze delays out, we could have a worker sitting on a
-		// command channel processing any commands.
-		if e.Payload == "RELOADCONFIG" {
-			newConfig := LoadCSVLogConfig()
-			c.Lock()
-			c.config = newConfig
-			c.Unlock()
-
-		}
-		if e.Payload == "ROTATEFILE" {
-
-			c.rotateLog(true)
-
-		}
-		if e.Payload == "ROTATEFILENOPRUNE" {
-
-			c.rotateLog(false)
-
-		}
-		// We could return without doing anything more here, but
-		// for now we move ahead with the filter processing on the
-		// basis that unless we either filter for "all" (with #) or
-		// filter for the CommandTopic, they won't be logged - but we
-		// may have a reason for wanting to track commands too
-	}
-	// Push the message into the channel and return
-	// the channel is buffered and is read by a goroutine so this should block for the shortest possible time
-	c.msgchan <- e
-	return false, nil
-}
--- a/plugins/bridge/csvlog_test.go
+++ b/plugins/bridge/csvlog_test.go
@@ -1,36 +0,0 @@
-package bridge
-
-import (
-	"fmt"
-	"testing"
-)
-
-//Test_topicMatch is here to double check the topic matching logic
-func Test_topicMatch(t *testing.T) {
-
-	tests := []struct {
-		name   string
-		topic  string
-		filter string
-		want   bool
-	}{
-		// Some sample test cases
-		{name: "Simple", topic: "test", filter: "test", want: true},
-		{name: "Simple", topic: "test/cat", filter: "test/+", want: true},
-		{name: "Simple", topic: "test/cat/breed", filter: "test/+", want: false},
-		{name: "Simple", topic: "test/cat", filter: "test/#", want: true},
-		{name: "Simple", topic: "test/cat/banana", filter: "test/#", want: true},
-		{name: "Simple", topic: "test/cat/banana", filter: "test/+", want: false},
-		{name: "Simple", topic: "test/dog/banana", filter: "test/cat/+", want: false},
-		{name: "Simple", topic: "test/cat/banana", filter: "test/+/banana", want: true},
-	}
-
-	for _, tt := range tests {
-		fmt.Println(tt)
-		t.Run(tt.name, func(t *testing.T) {
-			if got := topicMatch(tt.topic, tt.filter); got != tt.want {
-				t.Errorf("topicMatch() = %v, want %v", got, tt.want)
-			}
-		})
-	}
-}
--- a/plugins/bridge/kafka.go
+++ b/plugins/bridge/kafka.go
@@ -11,7 +11,7 @@ import (
 	"go.uber.org/zap"
 )

-type kafkaConfig struct {
+type kafakConfig struct {
 	Addr             []string          `json:"addr"`
 	ConnectTopic     string            `json:"onConnect"`
 	SubscribeTopic   string            `json:"onSubscribe"`
@@ -22,11 +22,11 @@ type kafkaConfig struct {
 }

 type kafka struct {
-	kafkaConfig kafkaConfig
+	kafakConfig kafakConfig
 	kafkaClient sarama.AsyncProducer
 }

-// InitKafka Init kafka client
+//Init init kafak client
 func InitKafka() *kafka {
 	log.Info("start connect kafka....")
 	content, err := ioutil.ReadFile("./plugins/kafka/kafka.json")
@@ -34,12 +34,12 @@ func InitKafka() *kafka {
 		log.Fatal("Read config file error: ", zap.Error(err))
 	}
 	// log.Info(string(content))
-	var config kafkaConfig
+	var config kafakConfig
 	err = json.Unmarshal(content, &config)
 	if err != nil {
 		log.Fatal("Unmarshal config file error: ", zap.Error(err))
 	}
-	c := &kafka{kafkaConfig: config}
+	c := &kafka{kafakConfig: config}
 	c.connect()
 	return c
 }
@@ -48,7 +48,7 @@ func InitKafka() *kafka {
 func (k *kafka) connect() {
 	conf := sarama.NewConfig()
 	conf.Version = sarama.V1_1_1_0
-	kafkaClient, err := sarama.NewAsyncProducer(k.kafkaConfig.Addr, conf)
+	kafkaClient, err := sarama.NewAsyncProducer(k.kafakConfig.Addr, conf)
 	if err != nil {
 		log.Fatal("create kafka async producer failed: ", zap.Error(err))
 	}
@@ -63,8 +63,8 @@ func (k *kafka) connect() {
 }

 //Publish publish to kafka
-func (k *kafka) Publish(e *Elements) (bool, error) {
-	config := k.kafkaConfig
+func (k *kafka) Publish(e *Elements) error {
+	config := k.kafakConfig
 	key := e.ClientID
 	topics := make(map[string]bool)
 	switch e.Action {
@@ -96,10 +96,10 @@ func (k *kafka) Publish(e *Elements) (bool, error) {
 			topics[config.DisconnectTopic] = true
 		}
 	default:
-		return false, errors.New("error action: " + e.Action)
+		return errors.New("error action: " + e.Action)
 	}

-	return false, k.publish(topics, key, e)
+	return k.publish(topics, key, e)

 }

--- a/plugins/bridge/mock.go
+++ b/plugins/bridge/mock.go
@@ -2,6 +2,6 @@ package bridge

 type mockMQ struct{}

-func (m *mockMQ) Publish(e *Elements) (bool, error) {
-	return false, nil
+func (m *mockMQ) Publish(e *Elements) error {
+	return nil
 }
--- a/pool/fixpool.go
+++ b/pool/fixpool.go
@@ -1,7 +1,7 @@
 package pool

 import (
-	"github.com/cespare/xxhash/v2"
+	"github.com/segmentio/fasthash/fnv1a"
 )

 type WorkerPool struct {
@@ -29,7 +29,7 @@ func New(maxWorkers int) *WorkerPool {
 }

 func (p *WorkerPool) Submit(uid string, task func()) {
-	idx := xxhash.Sum64([]byte(uid)) % uint64(p.maxWorkers)
+	idx := fnv1a.HashString64(uid) % uint64(p.maxWorkers)
 	if task != nil {
 		p.taskQueue[idx] <- task
 	}
@@ -43,14 +43,16 @@ func (p *WorkerPool) dispatch() {
 }

 func startWorker(taskChan chan func()) {
-	var task func()
-	var ok bool
-	for {
-		task, ok = <-taskChan
-		if !ok {
-			break
+	go func() {
+		var task func()
+		var ok bool
+		for {
+			task, ok = <-taskChan
+			if !ok {
+				break
+			}
+			// Execute the task.
+			task()
 		}
-		// Execute the task.
-		task()
-	}
+	}()
 }
--- a/pool/pool.go
+++ b/pool/pool.go
@@ -0,0 +1,166 @@
+package pool
+
+// import "time"
+
+// const (
+// 	// This value is the size of the queue that workers register their
+// 	// availability to the dispatcher.  There may be hundreds of workers, but
+// 	// only a small channel is needed to register some of the workers.
+// 	readyQueueSize = 64
+
+// 	// If worker pool receives no new work for this period of time, then stop
+// 	// a worker goroutine.
+// 	idleTimeoutSec = 5
+// )
+
+// type WorkerPool struct {
+// 	maxWorkers   int
+// 	timeout      time.Duration
+// 	taskQueue    chan func()
+// 	readyWorkers chan chan func()
+// 	stoppedChan  chan struct{}
+// }
+
+// func New(maxWorkers int) *WorkerPool {
+// 	// There must be at least one worker.
+// 	if maxWorkers < 1 {
+// 		maxWorkers = 1
+// 	}
+
+// 	// taskQueue is unbuffered since items are always removed immediately.
+// 	pool := &WorkerPool{
+// 		taskQueue:    make(chan func()),
+// 		maxWorkers:   maxWorkers,
+// 		readyWorkers: make(chan chan func(), readyQueueSize),
+// 		timeout:      time.Second * idleTimeoutSec,
+// 		stoppedChan:  make(chan struct{}),
+// 	}
+
+// 	// Start the task dispatcher.
+// 	go pool.dispatch()
+
+// 	return pool
+// }
+
+// func (p *WorkerPool) Stop() {
+// 	if p.Stopped() {
+// 		return
+// 	}
+// 	close(p.taskQueue)
+// 	<-p.stoppedChan
+// }
+
+// func (p *WorkerPool) Stopped() bool {
+// 	select {
+// 	case <-p.stoppedChan:
+// 		return true
+// 	default:
+// 	}
+// 	return false
+// }
+
+// func (p *WorkerPool) Submit(task func()) {
+// 	if task != nil {
+// 		p.taskQueue <- task
+// 	}
+// }
+
+// func (p *WorkerPool) SubmitWait(task func()) {
+// 	if task == nil {
+// 		return
+// 	}
+// 	doneChan := make(chan struct{})
+// 	p.taskQueue <- func() {
+// 		task()
+// 		close(doneChan)
+// 	}
+// 	<-doneChan
+// }
+
+// func (p *WorkerPool) dispatch() {
+// 	defer close(p.stoppedChan)
+// 	timeout := time.NewTimer(p.timeout)
+// 	var workerCount int
+// 	var task func()
+// 	var ok bool
+// 	var workerTaskChan chan func()
+// 	startReady := make(chan chan func())
+// Loop:
+// 	for {
+// 		timeout.Reset(p.timeout)
+// 		select {
+// 		case task, ok = <-p.taskQueue:
+// 			if !ok {
+// 				break Loop
+// 			}
+// 			// Got a task to do.
+// 			select {
+// 			case workerTaskChan = <-p.readyWorkers:
+// 				// A worker is ready, so give task to worker.
+// 				workerTaskChan <- task
+// 			default:
+// 				// No workers ready.
+// 				// Create a new worker, if not at max.
+// 				if workerCount < p.maxWorkers {
+// 					workerCount++
+// 					go func(t func()) {
+// 						startWorker(startReady, p.readyWorkers)
+// 						// Submit the task when the new worker.
+// 						taskChan := <-startReady
+// 						taskChan <- t
+// 					}(task)
+// 				} else {
+// 					// Start a goroutine to submit the task when an existing
+// 					// worker is ready.
+// 					go func(t func()) {
+// 						taskChan := <-p.readyWorkers
+// 						taskChan <- t
+// 					}(task)
+// 				}
+// 			}
+// 		case <-timeout.C:
+// 			// Timed out waiting for work to arrive.  Kill a ready worker.
+// 			if workerCount > 0 {
+// 				select {
+// 				case workerTaskChan = <-p.readyWorkers:
+// 					// A worker is ready, so kill.
+// 					close(workerTaskChan)
+// 					workerCount--
+// 				default:
+// 					// No work, but no ready workers.  All workers are busy.
+// 				}
+// 			}
+// 		}
+// 	}
+
+// 	// Stop all remaining workers as they become ready.
+// 	for workerCount > 0 {
+// 		workerTaskChan = <-p.readyWorkers
+// 		close(workerTaskChan)
+// 		workerCount--
+// 	}
+// }
+
+// func startWorker(startReady, readyWorkers chan chan func()) {
+// 	go func() {
+// 		taskChan := make(chan func())
+// 		var task func()
+// 		var ok bool
+// 		// Register availability on starReady channel.
+// 		startReady <- taskChan
+// 		for {
+// 			// Read task from dispatcher.
+// 			task, ok = <-taskChan
+// 			if !ok {
+// 				// Dispatcher has told worker to stop.
+// 				break
+// 			}
+
+// 			// Execute the task.
+// 			task()
+
+// 			// Register availability on readyWorkers channel.
+// 			readyWorkers <- taskChan
+// 		}
+// 	}()
+// }