feat: separate broker

broker.go

@@ -4,37 +4,35 @@ import (
 	"context"
 	"crypto/tls"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"log"
 	"net"
+	"strings"
 	"time"
 
 	"github.com/oarkflow/xsync"
 
+	"github.com/oarkflow/mq/codec"
 	"github.com/oarkflow/mq/consts"
+	"github.com/oarkflow/mq/jsonparser"
+	"github.com/oarkflow/mq/utils"
 )
 
+type QueuedTask struct {
+	Message    *codec.Message
+	RetryCount int
+}
+
 type consumer struct {
 	id   string
 	conn net.Conn
 }
 
-func (p *consumer) send(ctx context.Context, cmd any) error {
-	return Write(ctx, p.conn, cmd)
-}
-
 type publisher struct {
 	id   string
 	conn net.Conn
 }
 
-func (p *publisher) send(ctx context.Context, cmd any) error {
-	return Write(ctx, p.conn, cmd)
-}
-
-type Handler func(context.Context, Task) Result
-
 type Broker struct {
 	queues     xsync.IMap[string, *Queue]
 	consumers  xsync.IMap[string, *consumer]
@@ -42,100 +40,17 @@ type Broker struct {
 	opts       Options
 }
 
-type Queue struct {
-	name      string
-	consumers xsync.IMap[string, *consumer]
-	messages  xsync.IMap[string, *Task]
-	deferred  xsync.IMap[string, *Task]
-}
-
-func newQueue(name string) *Queue {
-	return &Queue{
-		name:      name,
-		consumers: xsync.NewMap[string, *consumer](),
-		messages:  xsync.NewMap[string, *Task](),
-		deferred:  xsync.NewMap[string, *Task](),
-	}
-}
-
-func (queue *Queue) send(ctx context.Context, cmd any) {
-	queue.consumers.ForEach(func(_ string, client *consumer) bool {
-		err := client.send(ctx, cmd)
-		if err != nil {
-			return false
-		}
-		return true
-	})
-}
-
-type Task struct {
-	ID           string          `json:"id"`
-	Payload      json.RawMessage `json:"payload"`
-	CreatedAt    time.Time       `json:"created_at"`
-	ProcessedAt  time.Time       `json:"processed_at"`
-	CurrentQueue string          `json:"current_queue"`
-	Status       string          `json:"status"`
-	Error        error           `json:"error"`
-}
-
-type Command struct {
-	ID        string          `json:"id"`
-	Command   consts.CMD      `json:"command"`
-	Queue     string          `json:"queue"`
-	MessageID string          `json:"message_id"`
-	Payload   json.RawMessage `json:"payload,omitempty"` // Used for carrying the task payload
-	Error     string          `json:"error,omitempty"`
-}
-
-type Result struct {
-	Command   string          `json:"command"`
-	Payload   json.RawMessage `json:"payload"`
-	Queue     string          `json:"queue"`
-	MessageID string          `json:"message_id"`
-	Error     error           `json:"error"`
-	Status    string          `json:"status"`
-}
-
 func NewBroker(opts ...Option) *Broker {
-	options := defaultOptions()
+	options := setupOptions(opts...)
-	for _, opt := range opts {
+	return &Broker{
-		opt(&options)
-	}
-	b := &Broker{
 		queues:     xsync.NewMap[string, *Queue](),
 		publishers: xsync.NewMap[string, *publisher](),
 		consumers:  xsync.NewMap[string, *consumer](),
+		opts:       options,
 	}
-	b.opts = defaultHandlers(options, b.onMessage, b.onClose, b.onError)
-	return b
 }
 
-func (b *Broker) Send(ctx context.Context, cmd Command) error {
+func (b *Broker) OnClose(ctx context.Context, _ net.Conn) error {
-	queue, ok := b.queues.Get(cmd.Queue)
-	if !ok || queue == nil {
-		return errors.New("invalid queue or not exists")
-	}
-	queue.send(ctx, cmd)
-	return nil
-}
-
-func (b *Broker) TLSConfig() TLSConfig {
-	return b.opts.tlsConfig
-}
-
-func (b *Broker) SyncMode() bool {
-	return b.opts.syncMode
-}
-
-func (b *Broker) sendToPublisher(ctx context.Context, publisherID string, result Result) error {
-	pub, ok := b.publishers.Get(publisherID)
-	if !ok {
-		return nil
-	}
-	return pub.send(ctx, result)
-}
-
-func (b *Broker) onClose(ctx context.Context, _ net.Conn) error {
 	consumerID, ok := GetConsumerID(ctx)
 	if ok && consumerID != "" {
 		if con, exists := b.consumers.Get(consumerID); exists {
@@ -157,11 +72,94 @@ func (b *Broker) onClose(ctx context.Context, _ net.Conn) error {
 	return nil
 }
 
-func (b *Broker) onError(_ context.Context, conn net.Conn, err error) {
+func (b *Broker) OnError(_ context.Context, conn net.Conn, err error) {
 	fmt.Println("Error reading from connection:", err, conn.RemoteAddr())
 }
 
-// Start the broker server with optional TLS support
+func (b *Broker) OnMessage(ctx context.Context, msg *codec.Message, conn net.Conn) {
+	switch msg.Command {
+	case consts.PUBLISH:
+		b.PublishHandler(ctx, conn, msg)
+	case consts.SUBSCRIBE:
+		b.SubscribeHandler(ctx, conn, msg)
+	case consts.MESSAGE_RESPONSE:
+		b.MessageResponseHandler(ctx, msg)
+	case consts.MESSAGE_ACK:
+		b.MessageAck(ctx, msg)
+	}
+}
+
+func (b *Broker) MessageAck(ctx context.Context, msg *codec.Message) {
+	consumerID, _ := GetConsumerID(ctx)
+	taskID, _ := jsonparser.GetString(msg.Payload, "id")
+	log.Printf("BROKER - MESSAGE_ACK ~> %s on %s for Task %s", consumerID, msg.Queue, taskID)
+}
+
+func (b *Broker) MessageResponseHandler(ctx context.Context, msg *codec.Message) {
+	msg.Command = consts.RESPONSE
+	headers, ok := GetHeaders(ctx)
+	if !ok {
+		return
+	}
+	b.HandleCallback(ctx, msg)
+	awaitResponse, ok := headers[consts.AwaitResponseKey]
+	if !(ok && awaitResponse == "true") {
+		return
+	}
+	publisherID, exists := headers[consts.PublisherKey]
+	if !exists {
+		return
+	}
+	con, ok := b.publishers.Get(publisherID)
+	if !ok {
+		return
+	}
+	err := b.send(con.conn, msg)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func (b *Broker) Publish(ctx context.Context, task Task, queue string) error {
+	headers, _ := GetHeaders(ctx)
+	payload, _ := json.Marshal(task)
+	msg := codec.NewMessage(consts.PUBLISH, payload, queue, headers)
+	b.broadcastToConsumers(ctx, msg)
+	return nil
+}
+
+func (b *Broker) PublishHandler(ctx context.Context, conn net.Conn, msg *codec.Message) {
+	pub := b.addPublisher(ctx, msg.Queue, conn)
+	taskID, _ := jsonparser.GetString(msg.Payload, "id")
+	log.Printf("BROKER - PUBLISH ~> received from %s on %s for Task %s", pub.id, msg.Queue, taskID)
+
+	ack := codec.NewMessage(consts.PUBLISH_ACK, []byte(fmt.Sprintf(`{"id":"%s"}`, taskID)), msg.Queue, msg.Headers)
+	if err := b.send(conn, ack); err != nil {
+		log.Printf("Error sending PUBLISH_ACK: %v\n", err)
+	}
+	b.broadcastToConsumers(ctx, msg)
+	go func() {
+		select {
+		case <-ctx.Done():
+			b.publishers.Del(pub.id)
+		}
+	}()
+}
+
+func (b *Broker) SubscribeHandler(ctx context.Context, conn net.Conn, msg *codec.Message) {
+	consumerID := b.addConsumer(ctx, msg.Queue, conn)
+	ack := codec.NewMessage(consts.SUBSCRIBE_ACK, nil, msg.Queue, msg.Headers)
+	if err := b.send(conn, ack); err != nil {
+		log.Printf("Error sending SUBSCRIBE_ACK: %v\n", err)
+	}
+	go func() {
+		select {
+		case <-ctx.Done():
+			b.removeConsumer(msg.Queue, consumerID)
+		}
+	}()
+}
+
 func (b *Broker) Start(ctx context.Context) error {
 	var listener net.Listener
 	var err error
@@ -178,113 +176,61 @@ func (b *Broker) Start(ctx context.Context) error {
 		if err != nil {
 			return fmt.Errorf("failed to start TLS listener: %v", err)
 		}
-		log.Println("TLS server started on", b.opts.brokerAddr)
+		log.Println("BROKER - RUNNING_TLS ~> started on", b.opts.brokerAddr)
 	} else {
 		listener, err = net.Listen("tcp", b.opts.brokerAddr)
 		if err != nil {
 			return fmt.Errorf("failed to start TCP listener: %v", err)
 		}
-		log.Println("TCP server started on", b.opts.brokerAddr)
+		log.Println("BROKER - RUNNING ~> started on", b.opts.brokerAddr)
 	}
 	defer listener.Close()
 	for {
 		conn, err := listener.Accept()
 		if err != nil {
-			fmt.Println("Error accepting connection:", err)
+			b.OnError(ctx, conn, err)
 			continue
 		}
-		go ReadFromConn(ctx, conn, Handlers{
+		go func(c net.Conn) {
-			MessageHandler: b.opts.messageHandler,
+			defer c.Close()
-			CloseHandler:   b.opts.closeHandler,
+			for {
-			ErrorHandler:   b.opts.errorHandler,
+				err := b.readMessage(ctx, c)
-		})
+				if err != nil {
-	}
+					break
-}
+				}
-
-func (b *Broker) Publish(ctx context.Context, message Task, queueName string) Result {
-	queue, task, err := b.AddMessageToQueue(&message, queueName)
-	if err != nil {
-		return Result{Error: err}
-	}
-	result := Result{
-		Command:   "PUBLISH",
-		Payload:   message.Payload,
-		Queue:     queueName,
-		MessageID: task.ID,
-	}
-	if queue.consumers.Size() == 0 {
-		queue.deferred.Set(NewID(), &message)
-		fmt.Println("task deferred as no consumers are connected", queueName)
-		return result
-	}
-	queue.send(ctx, message)
-	return result
-}
-
-func (b *Broker) NewQueue(qName string) *Queue {
-	q, ok := b.queues.Get(qName)
-	if ok {
-		return q
-	}
-	q = newQueue(qName)
-	b.queues.Set(qName, q)
-	return q
-}
-
-func (b *Broker) AddMessageToQueue(task *Task, queueName string) (*Queue, *Task, error) {
-	queue := b.NewQueue(queueName)
-	if task.ID == "" {
-		task.ID = NewID()
-	}
-	if queueName != "" {
-		task.CurrentQueue = queueName
-	}
-	task.CreatedAt = time.Now()
-	queue.messages.Set(task.ID, task)
-	return queue, task, nil
-}
-
-func (b *Broker) HandleProcessedMessage(ctx context.Context, result Result) error {
-	publisherID, ok := GetPublisherID(ctx)
-	if ok && publisherID != "" {
-		err := b.sendToPublisher(ctx, publisherID, result)
-		if err != nil {
-			return err
-		}
-	}
-	for _, callback := range b.opts.callback {
-		if callback != nil {
-			rs := callback(ctx, result)
-			if rs.Error != nil {
-				return rs.Error
 			}
-		}
+		}(conn)
 	}
-	return nil
 }
 
-func (b *Broker) addConsumer(ctx context.Context, queueName string, conn net.Conn) string {
+func (b *Broker) send(conn net.Conn, msg *codec.Message) error {
-	consumerID, ok := GetConsumerID(ctx)
+	return codec.SendMessage(conn, msg, b.opts.aesKey, b.opts.hmacKey, b.opts.enableEncryption)
-	defer func() {
-		cmd := Command{
-			Command: consts.SUBSCRIBE_ACK,
-			Queue:   queueName,
-			Error:   "",
-		}
-		Write(ctx, conn, cmd)
-		log.Printf("Consumer %s joined server on queue %s", consumerID, queueName)
-	}()
-	q, ok := b.queues.Get(queueName)
-	if !ok {
-		q = b.NewQueue(queueName)
-	}
-	con := &consumer{id: consumerID, conn: conn}
-	b.consumers.Set(consumerID, con)
-	q.consumers.Set(consumerID, con)
-	return consumerID
 }
 
-func (b *Broker) addPublisher(ctx context.Context, queueName string, conn net.Conn) string {
+func (b *Broker) receive(c net.Conn) (*codec.Message, error) {
+	return codec.ReadMessage(c, b.opts.aesKey, b.opts.hmacKey, b.opts.enableEncryption)
+}
+
+func (b *Broker) broadcastToConsumers(ctx context.Context, msg *codec.Message) {
+	if queue, ok := b.queues.Get(msg.Queue); ok {
+		task := &QueuedTask{Message: msg, RetryCount: 0}
+		queue.tasks <- task
+	}
+}
+
+func (b *Broker) waitForConsumerAck(conn net.Conn) error {
+	msg, err := b.receive(conn)
+	if err != nil {
+		return err
+	}
+	if msg.Command == consts.MESSAGE_ACK {
+		log.Println("Received CONSUMER_ACK: Subscribed successfully")
+		return nil
+	}
+	return fmt.Errorf("expected CONSUMER_ACK, got: %v", msg.Command)
+}
+
+func (b *Broker) addPublisher(ctx context.Context, queueName string, conn net.Conn) *publisher {
 	publisherID, ok := GetPublisherID(ctx)
 	_, ok = b.queues.Get(queueName)
 	if !ok {
@@ -292,20 +238,22 @@ func (b *Broker) addPublisher(ctx context.Context, queueName string, conn net.Co
 	}
 	con := &publisher{id: publisherID, conn: conn}
 	b.publishers.Set(publisherID, con)
-	return publisherID
+	return con
 }
 
-func (b *Broker) subscribe(ctx context.Context, queueName string, conn net.Conn) {
+func (b *Broker) addConsumer(ctx context.Context, queueName string, conn net.Conn) string {
-	consumerID := b.addConsumer(ctx, queueName, conn)
+	consumerID, ok := GetConsumerID(ctx)
-	go func() {
+	q, ok := b.queues.Get(queueName)
-		select {
+	if !ok {
-		case <-ctx.Done():
+		q = b.NewQueue(queueName)
-			b.removeConsumer(queueName, consumerID)
+	}
-		}
+	con := &consumer{id: consumerID, conn: conn}
-	}()
+	b.consumers.Set(consumerID, con)
+	q.consumers.Set(consumerID, con)
+	log.Printf("BROKER - SUBSCRIBE ~> %s on %s", consumerID, queueName)
+	return consumerID
 }
 
-// Removes connection from the queue and broker
 func (b *Broker) removeConsumer(queueName, consumerID string) {
 	if queue, ok := b.queues.Get(queueName); ok {
 		con, ok := queue.consumers.Get(consumerID)
@@ -317,57 +265,59 @@ func (b *Broker) removeConsumer(queueName, consumerID string) {
 	}
 }
 
-func (b *Broker) onMessage(ctx context.Context, conn net.Conn, message []byte) error {
+func (b *Broker) readMessage(ctx context.Context, c net.Conn) error {
-	var cmdMsg Command
+	msg, err := b.receive(c)
-	var resultMsg Result
-	err := json.Unmarshal(message, &cmdMsg)
 	if err == nil {
-		return b.handleCommandMessage(ctx, conn, cmdMsg)
+		ctx = SetHeaders(ctx, msg.Headers)
-	}
+		b.OnMessage(ctx, msg, c)
-	err = json.Unmarshal(message, &resultMsg)
-	if err == nil {
-		return b.handleTaskMessage(ctx, conn, resultMsg)
-	}
-	return nil
-}
-
-func (b *Broker) handleTaskMessage(ctx context.Context, _ net.Conn, msg Result) error {
-	return b.HandleProcessedMessage(ctx, msg)
-}
-
-func (b *Broker) publish(ctx context.Context, conn net.Conn, msg Command) error {
-	status := "PUBLISH"
-	if msg.Command == consts.REQUEST {
-		status = "REQUEST"
-	}
-	b.addPublisher(ctx, msg.Queue, conn)
-	task := Task{
-		ID:           msg.MessageID,
-		Payload:      msg.Payload,
-		CreatedAt:    time.Now(),
-		CurrentQueue: msg.Queue,
-	}
-	result := b.Publish(ctx, task, msg.Queue)
-	if result.Error != nil {
-		return result.Error
-	}
-	if task.ID != "" {
-		result.Status = status
-		result.MessageID = task.ID
-		result.Queue = msg.Queue
-		return Write(ctx, conn, result)
-	}
-	return nil
-}
-
-func (b *Broker) handleCommandMessage(ctx context.Context, conn net.Conn, msg Command) error {
-	switch msg.Command {
-	case consts.SUBSCRIBE:
-		b.subscribe(ctx, msg.Queue, conn)
 		return nil
-	case consts.PUBLISH, consts.REQUEST:
+	}
-		return b.publish(ctx, conn, msg)
+	if err.Error() == "EOF" || strings.Contains(err.Error(), "closed network connection") {
-	default:
+		b.OnClose(ctx, c)
-		return fmt.Errorf("unknown command: %d", msg.Command)
+		return err
+	}
+	b.OnError(ctx, c, err)
+	return err
+}
+
+func (b *Broker) dispatchWorker(queue *Queue) {
+	delay := b.opts.initialDelay
+	for task := range queue.tasks {
+		success := false
+		for !success && task.RetryCount <= b.opts.maxRetries {
+			if b.dispatchTaskToConsumer(queue, task) {
+				success = true
+			} else {
+				task.RetryCount++
+				delay = b.backoffRetry(queue, task, delay)
+			}
+		}
 	}
 }
+
+func (b *Broker) dispatchTaskToConsumer(queue *Queue, task *QueuedTask) bool {
+	var consumerFound bool
+	queue.consumers.ForEach(func(_ string, con *consumer) bool {
+		if err := b.send(con.conn, task.Message); err == nil {
+			consumerFound = true
+			return false // break the loop once a consumer is found
+		}
+		return true
+	})
+	if !consumerFound {
+		log.Printf("No available consumers for queue %s, retrying...", queue.name)
+	}
+	return consumerFound
+}
+
+func (b *Broker) backoffRetry(queue *Queue, task *QueuedTask, delay time.Duration) time.Duration {
+	backoffDuration := utils.CalculateJitter(delay, b.opts.jitterPercent)
+	log.Printf("Backing off for %v before retrying task for queue %s", backoffDuration, task.Message.Queue)
+	time.Sleep(backoffDuration)
+	queue.tasks <- task
+	delay *= 2
+	if delay > b.opts.maxBackoff {
+		delay = b.opts.maxBackoff
+	}
+	return delay
+}

consumer.go

@@ -7,10 +7,13 @@ import (
 	"fmt"
 	"log"
 	"net"
+	"strings"
 	"sync"
 	"time"
 
+	"github.com/oarkflow/mq/codec"
 	"github.com/oarkflow/mq/consts"
+	"github.com/oarkflow/mq/jsonparser"
 	"github.com/oarkflow/mq/utils"
 )
 
@@ -25,16 +28,20 @@ type Consumer struct {
 
 // NewConsumer initializes a new consumer with the provided options.
 func NewConsumer(id string, opts ...Option) *Consumer {
-	options := defaultOptions()
+	options := setupOptions(opts...)
-	for _, opt := range opts {
+	return &Consumer{
-		opt(&options)
-	}
-	b := &Consumer{
 		handlers: make(map[string]Handler),
 		id:       id,
+		opts:     options,
 	}
-	b.opts = defaultHandlers(options, b.onMessage, b.onClose, b.onError)
+}
-	return b
+
+func (c *Consumer) send(conn net.Conn, msg *codec.Message) error {
+	return codec.SendMessage(conn, msg, c.opts.aesKey, c.opts.hmacKey, c.opts.enableEncryption)
+}
+
+func (c *Consumer) receive(conn net.Conn) (*codec.Message, error) {
+	return codec.ReadMessage(conn, c.opts.aesKey, c.opts.hmacKey, c.opts.enableEncryption)
 }
 
 // Close closes the consumer's connection.
@@ -43,90 +50,82 @@ func (c *Consumer) Close() error {
 }
 
 // Subscribe to a specific queue.
-func (c *Consumer) subscribe(queue string) error {
+func (c *Consumer) subscribe(ctx context.Context, queue string) error {
-	ctx := context.Background()
+	headers := WithHeaders(ctx, map[string]string{
-	ctx = SetHeaders(ctx, map[string]string{
 		consts.ConsumerKey: c.id,
 		consts.ContentType: consts.TypeJson,
 	})
-	subscribe := Command{
+	msg := codec.NewMessage(consts.SUBSCRIBE, nil, queue, headers)
-		Command: consts.SUBSCRIBE,
+	if err := c.send(c.conn, msg); err != nil {
-		Queue:   queue,
+		return err
-		ID:      NewID(),
+	}
+
+	return c.waitForAck(c.conn)
+}
+
+func (c *Consumer) OnClose(ctx context.Context, _ net.Conn) error {
+	fmt.Println("Consumer closed")
+	return nil
+}
+
+func (c *Consumer) OnError(_ context.Context, conn net.Conn, err error) {
+	fmt.Println("Error reading from connection:", err, conn.RemoteAddr())
+}
+
+func (c *Consumer) OnMessage(ctx context.Context, msg *codec.Message, conn net.Conn) {
+	headers := WithHeaders(ctx, map[string]string{
+		consts.ConsumerKey: c.id,
+		consts.ContentType: consts.TypeJson,
+	})
+	taskID, _ := jsonparser.GetString(msg.Payload, "id")
+	reply := codec.NewMessage(consts.MESSAGE_ACK, []byte(fmt.Sprintf(`{"id":"%s"}`, taskID)), msg.Queue, headers)
+	if err := c.send(conn, reply); err != nil {
+		fmt.Printf("failed to send MESSAGE_ACK for queue %s: %v", msg.Queue, err)
+	}
+	var task Task
+	err := json.Unmarshal(msg.Payload, &task)
+	if err != nil {
+		log.Println("Error unmarshalling message:", err)
+		return
+	}
+	ctx = SetHeaders(ctx, map[string]string{consts.QueueKey: msg.Queue})
+	result := c.ProcessTask(ctx, task)
+	result.MessageID = task.ID
+	result.Queue = msg.Queue
+	if result.Error != nil {
+		result.Status = "FAILED"
+	} else {
+		result.Status = "SUCCESS"
+	}
+	bt, _ := json.Marshal(result)
+	reply = codec.NewMessage(consts.MESSAGE_RESPONSE, bt, msg.Queue, headers)
+	if err := c.send(conn, reply); err != nil {
+		fmt.Printf("failed to send MESSAGE_RESPONSE for queue %s: %v", msg.Queue, err)
 	}
-	return Write(ctx, c.conn, subscribe)
 }
 
 // ProcessTask handles a received task message and invokes the appropriate handler.
 func (c *Consumer) ProcessTask(ctx context.Context, msg Task) Result {
-	handler, exists := c.handlers[msg.CurrentQueue]
+	queue, _ := GetQueue(ctx)
+	handler, exists := c.handlers[queue]
 	if !exists {
-		return Result{Error: errors.New("No handler for queue " + msg.CurrentQueue)}
+		return Result{Error: errors.New("No handler for queue " + queue)}
 	}
 	return handler(ctx, msg)
 }
 
-// Handle command message sent by the server.
-func (c *Consumer) handleCommandMessage(msg Command) error {
-	switch msg.Command {
-	case consts.STOP:
-		return c.Close()
-	case consts.SUBSCRIBE_ACK:
-		log.Printf("Consumer %s subscribed to queue %s\n", c.id, msg.Queue)
-		return nil
-	default:
-		return fmt.Errorf("unknown command in consumer %d", msg.Command)
-	}
-}
-
-// Handle task message sent by the server.
-func (c *Consumer) handleTaskMessage(ctx context.Context, msg Task) error {
-	response := c.ProcessTask(ctx, msg)
-	response.Queue = msg.CurrentQueue
-	if msg.ID == "" {
-		response.Error = errors.New("task ID is empty")
-		response.Command = "error"
-	} else {
-		response.Command = "completed"
-		response.MessageID = msg.ID
-	}
-	return c.sendResult(ctx, response)
-}
-
-// Send the result of task processing back to the server.
-func (c *Consumer) sendResult(ctx context.Context, response Result) error {
-	return Write(ctx, c.conn, response)
-}
-
-// Read and handle incoming messages.
-func (c *Consumer) readMessage(ctx context.Context, message []byte) error {
-	var cmdMsg Command
-	var task Task
-	err := json.Unmarshal(message, &cmdMsg)
-	if err == nil && cmdMsg.Command != 0 {
-		return c.handleCommandMessage(cmdMsg)
-	}
-	err = json.Unmarshal(message, &task)
-	if err == nil {
-		return c.handleTaskMessage(ctx, task)
-	}
-	return nil
-}
-
 // AttemptConnect tries to establish a connection to the server, with TLS or without, based on the configuration.
 func (c *Consumer) AttemptConnect() error {
 	var err error
 	delay := c.opts.initialDelay
-
 	for i := 0; i < c.opts.maxRetries; i++ {
 		conn, err := GetConnection(c.opts.brokerAddr, c.opts.tlsConfig)
 		if err == nil {
 			c.conn = conn
 			return nil
 		}
-
 		sleepDuration := utils.CalculateJitter(delay, c.opts.jitterPercent)
-		fmt.Printf("Failed connecting to %s (attempt %d/%d): %v, Retrying in %v...\n", c.opts.brokerAddr, i+1, c.opts.maxRetries, err, sleepDuration)
+		log.Printf("CONSUMER - SUBSCRIBE ~> Failed connecting to %s (attempt %d/%d): %v, Retrying in %v...\n", c.opts.brokerAddr, i+1, c.opts.maxRetries, err, sleepDuration)
 		time.Sleep(sleepDuration)
 		delay *= 2
 		if delay > c.opts.maxBackoff {
@@ -137,20 +136,19 @@ func (c *Consumer) AttemptConnect() error {
 	return fmt.Errorf("could not connect to server %s after %d attempts: %w", c.opts.brokerAddr, c.opts.maxRetries, err)
 }
 
-// onMessage reads incoming messages from the connection.
+func (c *Consumer) readMessage(ctx context.Context, conn net.Conn) error {
-func (c *Consumer) onMessage(ctx context.Context, conn net.Conn, message []byte) error {
+	msg, err := c.receive(conn)
-	return c.readMessage(ctx, message)
+	if err == nil {
-}
+		ctx = SetHeaders(ctx, msg.Headers)
-
+		c.OnMessage(ctx, msg, conn)
-// onClose handles connection close event.
+		return nil
-func (c *Consumer) onClose(ctx context.Context, conn net.Conn) error {
+	}
-	fmt.Println("Consumer Connection closed", c.id, conn.RemoteAddr())
+	if err.Error() == "EOF" || strings.Contains(err.Error(), "closed network connection") {
-	return nil
+		c.OnClose(ctx, conn)
-}
+		return err
-
+	}
-// onError handles errors while reading from the connection.
+	c.OnError(ctx, conn, err)
-func (c *Consumer) onError(ctx context.Context, conn net.Conn, err error) {
+	return err
-	fmt.Println("Error reading from consumer connection:", err, conn.RemoteAddr())
 }
 
 // Consume starts the consumer to consume tasks from the queues.
@@ -159,26 +157,39 @@ func (c *Consumer) Consume(ctx context.Context) error {
 	if err != nil {
 		return err
 	}
+	for _, q := range c.queues {
+		if err := c.subscribe(ctx, q); err != nil {
+			return fmt.Errorf("failed to connect to server for queue %s: %v", q, err)
+		}
+	}
 	var wg sync.WaitGroup
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
-		ReadFromConn(ctx, c.conn, Handlers{
+		for {
-			MessageHandler: c.opts.messageHandler,
+			if err := c.readMessage(ctx, c.conn); err != nil {
-			CloseHandler:   c.opts.closeHandler,
+				log.Println("Error reading message:", err)
-			ErrorHandler:   c.opts.errorHandler,
+				break
-		})
+			}
-		fmt.Println("Stopping consumer")
-	}()
-	for _, q := range c.queues {
-		if err := c.subscribe(q); err != nil {
-			return fmt.Errorf("failed to connect to server for queue %s: %v", q, err)
 		}
-	}
+	}()
+
 	wg.Wait()
 	return nil
 }
 
+func (c *Consumer) waitForAck(conn net.Conn) error {
+	msg, err := c.receive(conn)
+	if err != nil {
+		return err
+	}
+	if msg.Command == consts.SUBSCRIBE_ACK {
+		log.Printf("CONSUMER - SUBSCRIBE_ACK ~> %s on %s", c.id, msg.Queue)
+		return nil
+	}
+	return fmt.Errorf("expected SUBSCRIBE_ACK, got: %v", msg.Command)
+}
+
 // RegisterHandler registers a handler for a queue.
 func (c *Consumer) RegisterHandler(queue string, handler Handler) {
 	c.queues = append(c.queues, queue)

ctx.go

@@ -1,36 +1,31 @@
 package mq
 
 import (
-	"bufio"
-	"bytes"
 	"context"
 	"crypto/tls"
 	"crypto/x509"
 	"encoding/json"
 	"fmt"
-	"io"
 	"net"
 	"os"
-	"strings"
+	"time"
 
 	"github.com/oarkflow/xid"
 
-	"github.com/oarkflow/mq/codec"
 	"github.com/oarkflow/mq/consts"
 )
 
-type MessageHandler func(context.Context, net.Conn, []byte) error
+type Task struct {
-
+	ID          string          `json:"id"`
-type CloseHandler func(context.Context, net.Conn) error
+	Payload     json.RawMessage `json:"payload"`
-
+	CreatedAt   time.Time       `json:"created_at"`
-type ErrorHandler func(context.Context, net.Conn, error)
+	ProcessedAt time.Time       `json:"processed_at"`
-
+	Status      string          `json:"status"`
-type Handlers struct {
+	Error       error           `json:"error"`
-	MessageHandler MessageHandler
-	CloseHandler   CloseHandler
-	ErrorHandler   ErrorHandler
 }
 
+type Handler func(context.Context, Task) Result
+
 func IsClosed(conn net.Conn) bool {
 	_, err := conn.Read(make([]byte, 1))
 	if err != nil {
@@ -52,11 +47,31 @@ func SetHeaders(ctx context.Context, headers map[string]string) context.Context
 	return context.WithValue(ctx, consts.HeaderKey, hd)
 }
 
+func WithHeaders(ctx context.Context, headers map[string]string) map[string]string {
+	hd, ok := GetHeaders(ctx)
+	if !ok {
+		hd = make(map[string]string)
+	}
+	for key, val := range headers {
+		hd[key] = val
+	}
+	return hd
+}
+
 func GetHeaders(ctx context.Context) (map[string]string, bool) {
 	headers, ok := ctx.Value(consts.HeaderKey).(map[string]string)
 	return headers, ok
 }
 
+func GetHeader(ctx context.Context, key string) (string, bool) {
+	headers, ok := ctx.Value(consts.HeaderKey).(map[string]string)
+	if !ok {
+		return "", false
+	}
+	val, ok := headers[key]
+	return val, ok
+}
+
 func GetContentType(ctx context.Context) (string, bool) {
 	headers, ok := GetHeaders(ctx)
 	if !ok {
@@ -66,6 +81,15 @@ func GetContentType(ctx context.Context) (string, bool) {
 	return contentType, ok
 }
 
+func GetQueue(ctx context.Context) (string, bool) {
+	headers, ok := GetHeaders(ctx)
+	if !ok {
+		return "", false
+	}
+	contentType, ok := headers[consts.QueueKey]
+	return contentType, ok
+}
+
 func GetConsumerID(ctx context.Context) (string, bool) {
 	headers, ok := GetHeaders(ctx)
 	if !ok {
@@ -93,70 +117,6 @@ func GetPublisherID(ctx context.Context) (string, bool) {
 	return contentType, ok
 }
 
-func Write(ctx context.Context, conn net.Conn, data any) error {
-	msg := codec.Message{Headers: make(map[string]string)}
-	if headers, ok := GetHeaders(ctx); ok {
-		msg.Headers = headers
-	}
-	dataBytes, err := json.Marshal(data)
-	if err != nil {
-		return err
-	}
-	msg.Payload = dataBytes
-	messageBytes, err := json.Marshal(msg)
-	if err != nil {
-		return err
-	}
-	_, err = conn.Write(append(messageBytes, '\n'))
-	return err
-}
-
-func ReadFromConn(ctx context.Context, conn net.Conn, handlers Handlers) {
-	defer func() {
-		if handlers.CloseHandler != nil {
-			if err := handlers.CloseHandler(ctx, conn); err != nil {
-				fmt.Println("Error in close handler:", err)
-			}
-		}
-		conn.Close()
-	}()
-	reader := bufio.NewReader(conn)
-	for {
-		messageBytes, err := reader.ReadBytes('\n')
-		if err != nil {
-			if err == io.EOF || IsClosed(conn) || strings.Contains(err.Error(), "closed network connection") {
-				break
-			}
-			if handlers.ErrorHandler != nil {
-				handlers.ErrorHandler(ctx, conn, err)
-			}
-			continue
-		}
-		messageBytes = bytes.TrimSpace(messageBytes)
-		if len(messageBytes) == 0 {
-			continue
-		}
-		var msg codec.Message
-		err = json.Unmarshal(messageBytes, &msg)
-		if err != nil {
-			if handlers.ErrorHandler != nil {
-				handlers.ErrorHandler(ctx, conn, err)
-			}
-			continue
-		}
-		ctx = SetHeaders(ctx, msg.Headers)
-		if handlers.MessageHandler != nil {
-			err = handlers.MessageHandler(ctx, conn, msg.Payload)
-			if err != nil {
-				if handlers.ErrorHandler != nil {
-					handlers.ErrorHandler(ctx, conn, err)
-				}
-				continue
-			}
-		}
-	}
-}
-
 func NewID() string {
 	return xid.New().String()
 }

dag/dag.go

@@ -3,13 +3,13 @@ package dag
 import (
 	"context"
 	"encoding/json"
-	"fmt"
+	"github.com/oarkflow/mq/consts"
 	"log"
 	"net/http"
 	"sync"
+	"time"
 
 	"github.com/oarkflow/mq"
-	"github.com/oarkflow/mq/consts"
 )
 
 type taskContext struct {
@@ -76,12 +76,20 @@ func (d *DAG) Start(ctx context.Context, addr string) error {
 	if d.server.SyncMode() {
 		return nil
 	}
-	for _, con := range d.nodes {
-		go con.Consume(ctx)
-	}
 	go func() {
-		d.server.Start(ctx)
+		err := d.server.Start(ctx)
+		if err != nil {
+			panic(err)
+		}
 	}()
+	for _, con := range d.nodes {
+		go func(con *mq.Consumer) {
+			err := con.Consume(ctx)
+			if err != nil {
+				panic(err)
+			}
+		}(con)
+	}
 	log.Printf("HTTP server started on %s", addr)
 	config := d.server.TLSConfig()
 	if config.UseTLS {
@@ -90,16 +98,6 @@ func (d *DAG) Start(ctx context.Context, addr string) error {
 	return http.ListenAndServe(addr, nil)
 }
 
-func (d *DAG) PublishTask(ctx context.Context, payload []byte, queueName string, taskID ...string) mq.Result {
-	task := mq.Task{
-		Payload: payload,
-	}
-	if len(taskID) > 0 {
-		task.ID = taskID[0]
-	}
-	return d.server.Publish(ctx, task, queueName)
-}
-
 func (d *DAG) FindFirstNode() (string, bool) {
 	inDegree := make(map[string]int)
 	for n, _ := range d.nodes {
@@ -121,86 +119,23 @@ func (d *DAG) FindFirstNode() (string, bool) {
 	return "", false
 }
 
-func (d *DAG) Request(ctx context.Context, payload []byte) mq.Result {
+func (d *DAG) PublishTask(ctx context.Context, payload json.RawMessage, taskID ...string) error {
-	return d.sendSync(ctx, mq.Result{Payload: payload})
+	queue, ok := mq.GetQueue(ctx)
-}
+	if !ok {
-
+		queue = d.FirstNode
-func (d *DAG) Send(ctx context.Context, payload []byte) mq.Result {
-	if d.FirstNode == "" {
-		return mq.Result{Error: fmt.Errorf("initial node not defined")}
 	}
-	if d.server.SyncMode() {
+	var id string
-		return d.sendSync(ctx, mq.Result{Payload: payload})
+	if len(taskID) > 0 {
+		id = taskID[0]
+	} else {
+		id = mq.NewID()
 	}
-	resultCh := make(chan mq.Result)
+	task := mq.Task{
-	result := d.PublishTask(ctx, payload, d.FirstNode)
+		ID:        id,
-	if result.Error != nil {
+		Payload:   payload,
-		return result
+		CreatedAt: time.Now(),
 	}
-	d.mu.Lock()
+	return d.server.Publish(ctx, task, queue)
-	d.taskChMap[result.MessageID] = resultCh
-	d.mu.Unlock()
-	finalResult := <-resultCh
-	return finalResult
-}
-
-func (d *DAG) processNode(ctx context.Context, task mq.Result) mq.Result {
-	if con, ok := d.nodes[task.Queue]; ok {
-		return con.ProcessTask(ctx, mq.Task{
-			ID:           task.MessageID,
-			Payload:      task.Payload,
-			CurrentQueue: task.Queue,
-		})
-	}
-	return mq.Result{Error: fmt.Errorf("no consumer to process %s", task.Queue)}
-}
-
-func (d *DAG) sendSync(ctx context.Context, task mq.Result) mq.Result {
-	if task.MessageID == "" {
-		task.MessageID = mq.NewID()
-	}
-	if task.Queue == "" {
-		task.Queue = d.FirstNode
-	}
-	result := d.processNode(ctx, task)
-	if result.Error != nil {
-		return result
-	}
-	for _, target := range d.loopEdges[task.Queue] {
-		var items, results []json.RawMessage
-		if err := json.Unmarshal(result.Payload, &items); err != nil {
-			return mq.Result{Error: err}
-		}
-		for _, item := range items {
-			result = d.sendSync(ctx, mq.Result{
-				Command:   result.Command,
-				Payload:   item,
-				Queue:     target,
-				MessageID: result.MessageID,
-			})
-			if result.Error != nil {
-				return result
-			}
-			results = append(results, result.Payload)
-		}
-		bt, err := json.Marshal(results)
-		if err != nil {
-			return mq.Result{Error: err}
-		}
-		result.Payload = bt
-	}
-	if target, ok := d.edges[task.Queue]; ok {
-		result = d.sendSync(ctx, mq.Result{
-			Command:   result.Command,
-			Payload:   result.Payload,
-			Queue:     target,
-			MessageID: result.MessageID,
-		})
-		if result.Error != nil {
-			return result
-		}
-	}
-	return result
 }
 
 func (d *DAG) getCompletedResults(task mq.Result, ok bool, triggeredNode string) ([]byte, bool, bool) {
@@ -264,9 +199,12 @@ func (d *DAG) TaskCallback(ctx context.Context, task mq.Result) mq.Result {
 		ctx = mq.SetHeaders(ctx, map[string]string{consts.TriggerNode: task.Queue})
 		for _, loopNode := range loopNodes {
 			for _, item := range items {
-				rs := d.PublishTask(ctx, item, loopNode, task.MessageID)
+				ctx = mq.SetHeaders(ctx, map[string]string{
-				if rs.Error != nil {
+					consts.QueueKey: loopNode,
-					return rs
+				})
+				err := d.PublishTask(ctx, item, task.MessageID)
+				if err != nil {
+					return mq.Result{Error: err}
 				}
 			}
 		}
@@ -284,15 +222,14 @@ func (d *DAG) TaskCallback(ctx context.Context, task mq.Result) mq.Result {
 				totalItems: 1,
 			},
 		}
-		rs := d.PublishTask(ctx, payload, edge, task.MessageID)
+		err := d.PublishTask(ctx, payload, edge, task.MessageID)
-		if rs.Error != nil {
+		if err != nil {
-			return rs
+			return mq.Result{Error: err}
 		}
 	} else if completed {
 		d.mu.Lock()
 		if resultCh, ok := d.taskChMap[task.MessageID]; ok {
 			resultCh <- mq.Result{
-				Command:   "complete",
 				Payload:   payload,
 				Queue:     task.Queue,
 				MessageID: task.MessageID,

examples/consumer.go

@@ -2,9 +2,9 @@ package main
 
 import (
 	"context"
+	"github.com/oarkflow/mq"
 
 	"github.com/oarkflow/mq/examples/tasks"
-	mq "github.com/oarkflow/mq/v2"
 )
 
 func main() {

examples/dag.go

@@ -2,19 +2,15 @@ package main
 
 import (
 	"context"
-	"encoding/json"
-	"io"
-	"net/http"
-
-	"github.com/oarkflow/mq"
 	"github.com/oarkflow/mq/dag"
 	"github.com/oarkflow/mq/examples/tasks"
+	"time"
 )
 
 var d *dag.DAG
 
 func main() {
-	d = dag.New(mq.WithTLS(true, "server.crt", "server.key"), mq.WithCAPath("ca.crt"))
+	d = dag.New()
 	d.AddNode("queue1", tasks.Node1)
 	d.AddNode("queue2", tasks.Node2)
 	d.AddNode("queue3", tasks.Node3)
@@ -24,45 +20,14 @@ func main() {
 	d.AddLoop("queue2", "queue3")
 	d.AddEdge("queue2", "queue4")
 	d.Prepare()
-	http.HandleFunc("POST /publish", requestHandler("publish"))
+	go func() {
-	http.HandleFunc("POST /request", requestHandler("request"))
+		d.Start(context.Background(), ":8081")
-	err := d.Start(context.TODO(), ":8083")
+	}()
+	time.Sleep(5 * time.Second)
+	err := d.PublishTask(context.Background(), []byte(`{"tast": 123}`))
 	if err != nil {
 		panic(err)
 	}
-}
 
-func requestHandler(requestType string) func(w http.ResponseWriter, r *http.Request) {
+	time.Sleep(10 * time.Second)
-	return func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodPost {
-			http.Error(w, "Invalid request method", http.StatusMethodNotAllowed)
-			return
-		}
-		var payload []byte
-		if r.Body != nil {
-			defer r.Body.Close()
-			var err error
-			payload, err = io.ReadAll(r.Body)
-			if err != nil {
-				http.Error(w, "Failed to read request body", http.StatusBadRequest)
-				return
-			}
-		} else {
-			http.Error(w, "Empty request body", http.StatusBadRequest)
-			return
-		}
-		var rs mq.Result
-		if requestType == "request" {
-			rs = d.Request(context.Background(), payload)
-		} else {
-			rs = d.Send(context.Background(), payload)
-		}
-		w.Header().Set("Content-Type", "application/json")
-		result := map[string]any{
-			"message_id": rs.MessageID,
-			"payload":    string(rs.Payload),
-			"error":      rs.Error,
-		}
-		json.NewEncoder(w).Encode(result)
-	}
 }

examples/publisher.go

@@ -3,17 +3,16 @@ package main
 import (
 	"context"
 	"fmt"
+	mq2 "github.com/oarkflow/mq"
 	"time"
-
-	mq "github.com/oarkflow/mq/v2"
 )
 
 func main() {
 	payload := []byte(`{"message":"Message Publisher \n Task"}`)
-	task := mq.Task{
+	task := mq2.Task{
 		Payload: payload,
 	}
-	publisher := mq.NewPublisher("publish-1")
+	publisher := mq2.NewPublisher("publish-1")
 	// publisher := mq.NewPublisher("publish-1", mq.WithTLS(true, "./certs/server.crt", "./certs/server.key"))
 	err := publisher.Publish(context.Background(), task, "queue1")
 	if err != nil {
@@ -21,7 +20,7 @@ func main() {
 	}
 	fmt.Println("Async task published successfully")
 	payload = []byte(`{"message":"Fire-and-Forget \n Task"}`)
-	task = mq.Task{
+	task = mq2.Task{
 		Payload: payload,
 	}
 	for i := 0; i < 100; i++ {

examples/server.go

@@ -2,13 +2,13 @@ package main
 
 import (
 	"context"
+	mq2 "github.com/oarkflow/mq"
 
 	"github.com/oarkflow/mq/examples/tasks"
-	mq "github.com/oarkflow/mq/v2"
 )
 
 func main() {
-	b := mq.NewBroker(mq.WithCallback(tasks.Callback))
+	b := mq2.NewBroker(mq2.WithCallback(tasks.Callback))
 	// b := mq.NewBroker(mq.WithCallback(tasks.Callback), mq.WithTLS(true, "./certs/server.crt", "./certs/server.key"), mq.WithCAPath("./certs/ca.cert"))
 	b.NewQueue("queue1")
 	b.NewQueue("queue2")

examples/tasks/tasks.go

@@ -4,42 +4,41 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-
+	mq2 "github.com/oarkflow/mq"
-	mq "github.com/oarkflow/mq/v2"
 )
 
-func Node1(ctx context.Context, task mq.Task) mq.Result {
+func Node1(ctx context.Context, task mq2.Task) mq2.Result {
 	fmt.Println("Processing queue1", task.ID)
-	return mq.Result{Payload: task.Payload, MessageID: task.ID}
+	return mq2.Result{Payload: task.Payload, MessageID: task.ID}
 }
 
-func Node2(ctx context.Context, task mq.Task) mq.Result {
+func Node2(ctx context.Context, task mq2.Task) mq2.Result {
-	return mq.Result{Payload: task.Payload, MessageID: task.ID}
+	return mq2.Result{Payload: task.Payload, MessageID: task.ID}
 }
 
-func Node3(ctx context.Context, task mq.Task) mq.Result {
+func Node3(ctx context.Context, task mq2.Task) mq2.Result {
 	var data map[string]any
 	err := json.Unmarshal(task.Payload, &data)
 	if err != nil {
-		return mq.Result{Error: err}
+		return mq2.Result{Error: err}
 	}
 	data["salary"] = fmt.Sprintf("12000%v", data["user_id"])
 	bt, _ := json.Marshal(data)
-	return mq.Result{Payload: bt, MessageID: task.ID}
+	return mq2.Result{Payload: bt, MessageID: task.ID}
 }
 
-func Node4(ctx context.Context, task mq.Task) mq.Result {
+func Node4(ctx context.Context, task mq2.Task) mq2.Result {
 	var data []map[string]any
 	err := json.Unmarshal(task.Payload, &data)
 	if err != nil {
-		return mq.Result{Error: err}
+		return mq2.Result{Error: err}
 	}
 	payload := map[string]any{"storage": data}
 	bt, _ := json.Marshal(payload)
-	return mq.Result{Payload: bt, MessageID: task.ID}
+	return mq2.Result{Payload: bt, MessageID: task.ID}
 }
 
-func Callback(ctx context.Context, task mq.Result) mq.Result {
+func Callback(ctx context.Context, task mq2.Result) mq2.Result {
 	fmt.Println("Received task", task.MessageID, "Payload", string(task.Payload), task.Error, task.Queue)
-	return mq.Result{}
+	return mq2.Result{}
 }

options.go

@@ -2,9 +2,18 @@ package mq
 
 import (
 	"context"
+	"encoding/json"
 	"time"
 )
 
+type Result struct {
+	Payload   json.RawMessage `json:"payload"`
+	Queue     string          `json:"queue"`
+	MessageID string          `json:"message_id"`
+	Error     error           `json:"error,omitempty"`
+	Status    string          `json:"status"`
+}
+
 type TLSConfig struct {
 	UseTLS   bool
 	CertPath string
@@ -13,17 +22,18 @@ type TLSConfig struct {
 }
 
 type Options struct {
-	syncMode       bool
+	syncMode         bool
-	brokerAddr     string
+	brokerAddr       string
-	messageHandler MessageHandler
+	callback         []func(context.Context, Result) Result
-	closeHandler   CloseHandler
+	maxRetries       int
-	errorHandler   ErrorHandler
+	initialDelay     time.Duration
-	callback       []func(context.Context, Result) Result
+	maxBackoff       time.Duration
-	maxRetries     int
+	jitterPercent    float64
-	initialDelay   time.Duration
+	tlsConfig        TLSConfig
-	maxBackoff     time.Duration
+	aesKey           json.RawMessage
-	jitterPercent  float64
+	hmacKey          json.RawMessage
-	tlsConfig      TLSConfig
+	enableEncryption bool
+	queueSize        int
 }
 
 func defaultOptions() Options {
@@ -34,27 +44,29 @@ func defaultOptions() Options {
 		initialDelay:  2 * time.Second,
 		maxBackoff:    20 * time.Second,
 		jitterPercent: 0.5,
+		queueSize:     100,
 	}
 }
 
-func defaultHandlers(options Options, onMessage MessageHandler, onClose CloseHandler, onError ErrorHandler) Options {
-	if options.messageHandler == nil {
-		options.messageHandler = onMessage
-	}
-
-	if options.closeHandler == nil {
-		options.closeHandler = onClose
-	}
-
-	if options.errorHandler == nil {
-		options.errorHandler = onError
-	}
-	return options
-}
-
 // Option defines a function type for setting options.
 type Option func(*Options)
 
+func setupOptions(opts ...Option) Options {
+	options := defaultOptions()
+	for _, opt := range opts {
+		opt(&options)
+	}
+	return options
+}
+
+func WithEncryption(aesKey, hmacKey json.RawMessage, enableEncryption bool) Option {
+	return func(opts *Options) {
+		opts.aesKey = aesKey
+		opts.hmacKey = hmacKey
+		opts.enableEncryption = enableEncryption
+	}
+}
+
 // WithBrokerURL -
 func WithBrokerURL(url string) Option {
 	return func(opts *Options) {
@@ -119,24 +131,3 @@ func WithJitterPercent(val float64) Option {
 		opts.jitterPercent = val
 	}
 }
-
-// WithMessageHandler sets a custom MessageHandler.
-func WithMessageHandler(handler MessageHandler) Option {
-	return func(opts *Options) {
-		opts.messageHandler = handler
-	}
-}
-
-// WithErrorHandler sets a custom ErrorHandler.
-func WithErrorHandler(handler ErrorHandler) Option {
-	return func(opts *Options) {
-		opts.errorHandler = handler
-	}
-}
-
-// WithCloseHandler sets a custom CloseHandler.
-func WithCloseHandler(handler CloseHandler) Option {
-	return func(opts *Options) {
-		opts.closeHandler = handler
-	}
-}

publisher.go

@@ -4,9 +4,13 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"log"
 	"net"
+	"time"
 
+	"github.com/oarkflow/mq/codec"
 	"github.com/oarkflow/mq/consts"
+	"github.com/oarkflow/mq/jsonparser"
 )
 
 type Publisher struct {
@@ -15,31 +19,59 @@ type Publisher struct {
 }
 
 func NewPublisher(id string, opts ...Option) *Publisher {
-	options := defaultOptions()
+	options := setupOptions(opts...)
-	for _, opt := range opts {
+	return &Publisher{id: id, opts: options}
-		opt(&options)
-	}
-	b := &Publisher{id: id}
-	b.opts = defaultHandlers(options, nil, b.onClose, b.onError)
-	return b
 }
 
 func (p *Publisher) send(ctx context.Context, queue string, task Task, conn net.Conn, command consts.CMD) error {
-	ctx = SetHeaders(ctx, map[string]string{
+	headers := WithHeaders(ctx, map[string]string{
 		consts.PublisherKey: p.id,
 		consts.ContentType:  consts.TypeJson,
 	})
-	cmd := Command{
+	if task.ID == "" {
-		ID:        NewID(),
+		task.ID = NewID()
-		Command:   command,
-		Queue:     queue,
-		MessageID: task.ID,
-		Payload:   task.Payload,
 	}
-	return Write(ctx, conn, cmd)
+	task.CreatedAt = time.Now()
+	payload, err := json.Marshal(task)
+	if err != nil {
+		return err
+	}
+	msg := codec.NewMessage(command, payload, queue, headers)
+	if err := codec.SendMessage(conn, msg, p.opts.aesKey, p.opts.hmacKey, p.opts.enableEncryption); err != nil {
+		return err
+	}
+
+	return p.waitForAck(conn)
 }
 
-func (p *Publisher) Publish(ctx context.Context, queue string, task Task) error {
+func (p *Publisher) waitForAck(conn net.Conn) error {
+	msg, err := codec.ReadMessage(conn, p.opts.aesKey, p.opts.hmacKey, p.opts.enableEncryption)
+	if err != nil {
+		return err
+	}
+	if msg.Command == consts.PUBLISH_ACK {
+		taskID, _ := jsonparser.GetString(msg.Payload, "id")
+		log.Printf("PUBLISHER - PUBLISH_ACK ~> from %s on %s for Task %s", p.id, msg.Queue, taskID)
+		return nil
+	}
+	return fmt.Errorf("expected PUBLISH_ACK, got: %v", msg.Command)
+}
+
+func (p *Publisher) waitForResponse(conn net.Conn) Result {
+	msg, err := codec.ReadMessage(conn, p.opts.aesKey, p.opts.hmacKey, p.opts.enableEncryption)
+	if err != nil {
+		return Result{Error: err}
+	}
+	if msg.Command == consts.RESPONSE {
+		var result Result
+		err = json.Unmarshal(msg.Payload, &result)
+		return result
+	}
+	err = fmt.Errorf("expected RESPONSE, got: %v", msg.Command)
+	return Result{Error: err}
+}
+
+func (p *Publisher) Publish(ctx context.Context, task Task, queue string) error {
 	conn, err := GetConnection(p.opts.brokerAddr, p.opts.tlsConfig)
 	if err != nil {
 		return fmt.Errorf("failed to connect to broker: %w", err)
@@ -57,30 +89,22 @@ func (p *Publisher) onError(ctx context.Context, conn net.Conn, err error) {
 	fmt.Println("Error reading from publisher connection:", err, conn.RemoteAddr())
 }
 
-func (p *Publisher) Request(ctx context.Context, queue string, task Task) (Result, error) {
+func (p *Publisher) Request(ctx context.Context, queue string, task Task) Result {
+	ctx = SetHeaders(ctx, map[string]string{
+		consts.AwaitResponseKey: "true",
+	})
 	conn, err := GetConnection(p.opts.brokerAddr, p.opts.tlsConfig)
 	if err != nil {
-		return Result{Error: err}, fmt.Errorf("failed to connect to broker: %w", err)
+		err = fmt.Errorf("failed to connect to broker: %w", err)
+		return Result{Error: err}
 	}
 	defer conn.Close()
-	var result Result
+	err = p.send(ctx, queue, task, conn, consts.PUBLISH)
-	err = p.send(ctx, queue, task, conn, consts.REQUEST)
+	resultCh := make(chan Result)
-	if err != nil {
+	go func() {
-		return result, err
+		defer close(resultCh)
-	}
+		resultCh <- p.waitForResponse(conn)
-	if p.opts.messageHandler == nil {
+	}()
-		p.opts.messageHandler = func(ctx context.Context, conn net.Conn, message []byte) error {
+	finalResult := <-resultCh
-			err := json.Unmarshal(message, &result)
+	return finalResult
-			if err != nil {
-				return err
-			}
-			return conn.Close()
-		}
-	}
-	ReadFromConn(ctx, conn, Handlers{
-		MessageHandler: p.opts.messageHandler,
-		CloseHandler:   p.opts.closeHandler,
-		ErrorHandler:   p.opts.errorHandler,
-	})
-	return result, nil
 }

queue.go

@@ -1,4 +1,4 @@
-package v2
+package mq
 
 import (
 	"github.com/oarkflow/xsync"

util.go

@@ -1,4 +1,4 @@
-package v2
+package mq
 
 import (
 	"context"

v2/broker.go

@@ -1,323 +0,0 @@
-package v2
-
-import (
-	"context"
-	"crypto/tls"
-	"fmt"
-	"log"
-	"net"
-	"strings"
-	"time"
-
-	"github.com/oarkflow/xsync"
-
-	"github.com/oarkflow/mq/codec"
-	"github.com/oarkflow/mq/consts"
-	"github.com/oarkflow/mq/jsonparser"
-	"github.com/oarkflow/mq/utils"
-)
-
-type QueuedTask struct {
-	Message    *codec.Message
-	RetryCount int
-}
-
-type consumer struct {
-	id   string
-	conn net.Conn
-}
-
-type publisher struct {
-	id   string
-	conn net.Conn
-}
-
-type Broker struct {
-	queues     xsync.IMap[string, *Queue]
-	consumers  xsync.IMap[string, *consumer]
-	publishers xsync.IMap[string, *publisher]
-	opts       Options
-}
-
-func NewBroker(opts ...Option) *Broker {
-	options := setupOptions(opts...)
-	return &Broker{
-		queues:     xsync.NewMap[string, *Queue](),
-		publishers: xsync.NewMap[string, *publisher](),
-		consumers:  xsync.NewMap[string, *consumer](),
-		opts:       options,
-	}
-}
-
-func (b *Broker) OnClose(ctx context.Context, _ net.Conn) error {
-	consumerID, ok := GetConsumerID(ctx)
-	if ok && consumerID != "" {
-		if con, exists := b.consumers.Get(consumerID); exists {
-			con.conn.Close()
-			b.consumers.Del(consumerID)
-		}
-		b.queues.ForEach(func(_ string, queue *Queue) bool {
-			queue.consumers.Del(consumerID)
-			return true
-		})
-	}
-	publisherID, ok := GetPublisherID(ctx)
-	if ok && publisherID != "" {
-		if con, exists := b.publishers.Get(publisherID); exists {
-			con.conn.Close()
-			b.publishers.Del(publisherID)
-		}
-	}
-	return nil
-}
-
-func (b *Broker) OnError(_ context.Context, conn net.Conn, err error) {
-	fmt.Println("Error reading from connection:", err, conn.RemoteAddr())
-}
-
-func (b *Broker) OnMessage(ctx context.Context, msg *codec.Message, conn net.Conn) {
-	switch msg.Command {
-	case consts.PUBLISH:
-		b.PublishHandler(ctx, conn, msg)
-	case consts.SUBSCRIBE:
-		b.SubscribeHandler(ctx, conn, msg)
-	case consts.MESSAGE_RESPONSE:
-		b.MessageResponseHandler(ctx, msg)
-	case consts.MESSAGE_ACK:
-		b.MessageAck(ctx, msg)
-	}
-}
-
-func (b *Broker) MessageAck(ctx context.Context, msg *codec.Message) {
-	consumerID, _ := GetConsumerID(ctx)
-	taskID, _ := jsonparser.GetString(msg.Payload, "id")
-	log.Printf("BROKER - MESSAGE_ACK ~> %s on %s for Task %s", consumerID, msg.Queue, taskID)
-}
-
-func (b *Broker) MessageResponseHandler(ctx context.Context, msg *codec.Message) {
-	msg.Command = consts.RESPONSE
-	headers, ok := GetHeaders(ctx)
-	if !ok {
-		return
-	}
-	b.HandleCallback(ctx, msg)
-	awaitResponse, ok := headers[consts.AwaitResponseKey]
-	if !(ok && awaitResponse == "true") {
-		return
-	}
-	publisherID, exists := headers[consts.PublisherKey]
-	if !exists {
-		return
-	}
-	con, ok := b.publishers.Get(publisherID)
-	if !ok {
-		return
-	}
-	err := b.send(con.conn, msg)
-	if err != nil {
-		panic(err)
-	}
-}
-
-func (b *Broker) Publish(ctx context.Context, task Task, queue string) error {
-	headers, _ := GetHeaders(ctx)
-	msg := codec.NewMessage(consts.PUBLISH, task.Payload, queue, headers)
-	b.broadcastToConsumers(ctx, msg)
-	return nil
-}
-
-func (b *Broker) PublishHandler(ctx context.Context, conn net.Conn, msg *codec.Message) {
-	pub := b.addPublisher(ctx, msg.Queue, conn)
-	taskID, _ := jsonparser.GetString(msg.Payload, "id")
-	log.Printf("BROKER - PUBLISH ~> received from %s on %s for Task %s", pub.id, msg.Queue, taskID)
-
-	ack := codec.NewMessage(consts.PUBLISH_ACK, []byte(fmt.Sprintf(`{"id":"%s"}`, taskID)), msg.Queue, msg.Headers)
-	if err := b.send(conn, ack); err != nil {
-		log.Printf("Error sending PUBLISH_ACK: %v\n", err)
-	}
-	b.broadcastToConsumers(ctx, msg)
-	go func() {
-		select {
-		case <-ctx.Done():
-			b.publishers.Del(pub.id)
-		}
-	}()
-}
-
-func (b *Broker) SubscribeHandler(ctx context.Context, conn net.Conn, msg *codec.Message) {
-	consumerID := b.addConsumer(ctx, msg.Queue, conn)
-	ack := codec.NewMessage(consts.SUBSCRIBE_ACK, nil, msg.Queue, msg.Headers)
-	if err := b.send(conn, ack); err != nil {
-		log.Printf("Error sending SUBSCRIBE_ACK: %v\n", err)
-	}
-	go func() {
-		select {
-		case <-ctx.Done():
-			b.removeConsumer(msg.Queue, consumerID)
-		}
-	}()
-}
-
-func (b *Broker) Start(ctx context.Context) error {
-	var listener net.Listener
-	var err error
-
-	if b.opts.tlsConfig.UseTLS {
-		cert, err := tls.LoadX509KeyPair(b.opts.tlsConfig.CertPath, b.opts.tlsConfig.KeyPath)
-		if err != nil {
-			return fmt.Errorf("failed to load TLS certificates: %v", err)
-		}
-		tlsConfig := &tls.Config{
-			Certificates: []tls.Certificate{cert},
-		}
-		listener, err = tls.Listen("tcp", b.opts.brokerAddr, tlsConfig)
-		if err != nil {
-			return fmt.Errorf("failed to start TLS listener: %v", err)
-		}
-		log.Println("BROKER - RUNNING_TLS ~> started on", b.opts.brokerAddr)
-	} else {
-		listener, err = net.Listen("tcp", b.opts.brokerAddr)
-		if err != nil {
-			return fmt.Errorf("failed to start TCP listener: %v", err)
-		}
-		log.Println("BROKER - RUNNING ~> started on", b.opts.brokerAddr)
-	}
-	defer listener.Close()
-	for {
-		conn, err := listener.Accept()
-		if err != nil {
-			b.OnError(ctx, conn, err)
-			continue
-		}
-		go func(c net.Conn) {
-			defer c.Close()
-			for {
-				err := b.readMessage(ctx, c)
-				if err != nil {
-					break
-				}
-			}
-		}(conn)
-	}
-}
-
-func (b *Broker) send(conn net.Conn, msg *codec.Message) error {
-	return codec.SendMessage(conn, msg, b.opts.aesKey, b.opts.hmacKey, b.opts.enableEncryption)
-}
-
-func (b *Broker) receive(c net.Conn) (*codec.Message, error) {
-	return codec.ReadMessage(c, b.opts.aesKey, b.opts.hmacKey, b.opts.enableEncryption)
-}
-
-func (b *Broker) broadcastToConsumers(ctx context.Context, msg *codec.Message) {
-	if queue, ok := b.queues.Get(msg.Queue); ok {
-		task := &QueuedTask{Message: msg, RetryCount: 0}
-		queue.tasks <- task
-		log.Printf("Task enqueued for queue %s", msg.Queue)
-	}
-}
-
-func (b *Broker) waitForConsumerAck(conn net.Conn) error {
-	msg, err := b.receive(conn)
-	if err != nil {
-		return err
-	}
-	if msg.Command == consts.MESSAGE_ACK {
-		log.Println("Received CONSUMER_ACK: Subscribed successfully")
-		return nil
-	}
-	return fmt.Errorf("expected CONSUMER_ACK, got: %v", msg.Command)
-}
-
-func (b *Broker) addPublisher(ctx context.Context, queueName string, conn net.Conn) *publisher {
-	publisherID, ok := GetPublisherID(ctx)
-	_, ok = b.queues.Get(queueName)
-	if !ok {
-		b.NewQueue(queueName)
-	}
-	con := &publisher{id: publisherID, conn: conn}
-	b.publishers.Set(publisherID, con)
-	return con
-}
-
-func (b *Broker) addConsumer(ctx context.Context, queueName string, conn net.Conn) string {
-	consumerID, ok := GetConsumerID(ctx)
-	q, ok := b.queues.Get(queueName)
-	if !ok {
-		q = b.NewQueue(queueName)
-	}
-	con := &consumer{id: consumerID, conn: conn}
-	b.consumers.Set(consumerID, con)
-	q.consumers.Set(consumerID, con)
-	log.Printf("BROKER - SUBSCRIBE ~> %s on %s", consumerID, queueName)
-	return consumerID
-}
-
-func (b *Broker) removeConsumer(queueName, consumerID string) {
-	if queue, ok := b.queues.Get(queueName); ok {
-		con, ok := queue.consumers.Get(consumerID)
-		if ok {
-			con.conn.Close()
-			queue.consumers.Del(consumerID)
-		}
-		b.queues.Del(queueName)
-	}
-}
-
-func (b *Broker) readMessage(ctx context.Context, c net.Conn) error {
-	msg, err := b.receive(c)
-	if err == nil {
-		ctx = SetHeaders(ctx, msg.Headers)
-		b.OnMessage(ctx, msg, c)
-		return nil
-	}
-	if err.Error() == "EOF" || strings.Contains(err.Error(), "closed network connection") {
-		b.OnClose(ctx, c)
-		return err
-	}
-	b.OnError(ctx, c, err)
-	return err
-}
-
-func (b *Broker) dispatchWorker(queue *Queue) {
-	delay := b.opts.initialDelay
-	for task := range queue.tasks {
-		success := false
-		for !success && task.RetryCount <= b.opts.maxRetries {
-			if b.dispatchTaskToConsumer(queue, task) {
-				success = true
-			} else {
-				task.RetryCount++
-				delay = b.backoffRetry(queue, task, delay)
-			}
-		}
-	}
-}
-
-func (b *Broker) dispatchTaskToConsumer(queue *Queue, task *QueuedTask) bool {
-	var consumerFound bool
-	queue.consumers.ForEach(func(_ string, con *consumer) bool {
-		if err := b.send(con.conn, task.Message); err == nil {
-			consumerFound = true
-			log.Printf("Task dispatched to consumer %s on queue %s", con.id, queue.name)
-			return false // break the loop once a consumer is found
-		}
-		return true
-	})
-	if !consumerFound {
-		log.Printf("No available consumers for queue %s, retrying...", queue.name)
-	}
-	return consumerFound
-}
-
-func (b *Broker) backoffRetry(queue *Queue, task *QueuedTask, delay time.Duration) time.Duration {
-	backoffDuration := utils.CalculateJitter(delay, b.opts.jitterPercent)
-	log.Printf("Backing off for %v before retrying task for queue %s", backoffDuration, task.Message.Queue)
-	time.Sleep(backoffDuration)
-	queue.tasks <- task
-	delay *= 2
-	if delay > b.opts.maxBackoff {
-		delay = b.opts.maxBackoff
-	}
-	return delay
-}

v2/consumer.go

@@ -1,197 +0,0 @@
-package v2
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"log"
-	"net"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/oarkflow/mq/codec"
-	"github.com/oarkflow/mq/consts"
-	"github.com/oarkflow/mq/jsonparser"
-	"github.com/oarkflow/mq/utils"
-)
-
-// Consumer structure to hold consumer-specific configurations and state.
-type Consumer struct {
-	id       string
-	handlers map[string]Handler
-	conn     net.Conn
-	queues   []string
-	opts     Options
-}
-
-// NewConsumer initializes a new consumer with the provided options.
-func NewConsumer(id string, opts ...Option) *Consumer {
-	options := setupOptions(opts...)
-	return &Consumer{
-		handlers: make(map[string]Handler),
-		id:       id,
-		opts:     options,
-	}
-}
-
-func (c *Consumer) send(conn net.Conn, msg *codec.Message) error {
-	return codec.SendMessage(conn, msg, c.opts.aesKey, c.opts.hmacKey, c.opts.enableEncryption)
-}
-
-func (c *Consumer) receive(conn net.Conn) (*codec.Message, error) {
-	return codec.ReadMessage(conn, c.opts.aesKey, c.opts.hmacKey, c.opts.enableEncryption)
-}
-
-// Close closes the consumer's connection.
-func (c *Consumer) Close() error {
-	return c.conn.Close()
-}
-
-// Subscribe to a specific queue.
-func (c *Consumer) subscribe(ctx context.Context, queue string) error {
-	headers := WithHeaders(ctx, map[string]string{
-		consts.ConsumerKey: c.id,
-		consts.ContentType: consts.TypeJson,
-	})
-	msg := codec.NewMessage(consts.SUBSCRIBE, nil, queue, headers)
-	if err := c.send(c.conn, msg); err != nil {
-		return err
-	}
-
-	return c.waitForAck(c.conn)
-}
-
-func (c *Consumer) OnClose(ctx context.Context, _ net.Conn) error {
-	fmt.Println("Consumer closed")
-	return nil
-}
-
-func (c *Consumer) OnError(_ context.Context, conn net.Conn, err error) {
-	fmt.Println("Error reading from connection:", err, conn.RemoteAddr())
-}
-
-func (c *Consumer) OnMessage(ctx context.Context, msg *codec.Message, conn net.Conn) {
-	headers := WithHeaders(ctx, map[string]string{
-		consts.ConsumerKey: c.id,
-		consts.ContentType: consts.TypeJson,
-	})
-	taskID, _ := jsonparser.GetString(msg.Payload, "id")
-	reply := codec.NewMessage(consts.MESSAGE_ACK, []byte(fmt.Sprintf(`{"id":"%s"}`, taskID)), msg.Queue, headers)
-	if err := c.send(conn, reply); err != nil {
-		fmt.Printf("failed to send MESSAGE_ACK for queue %s: %v", msg.Queue, err)
-	}
-	var task Task
-	err := json.Unmarshal(msg.Payload, &task)
-	if err != nil {
-		log.Println("Error unmarshalling message:", err)
-		return
-	}
-	ctx = SetHeaders(ctx, map[string]string{consts.QueueKey: msg.Queue})
-	result := c.ProcessTask(ctx, task)
-	result.MessageID = task.ID
-	result.Queue = msg.Queue
-	if result.Error != nil {
-		result.Status = "FAILED"
-	} else {
-		result.Status = "SUCCESS"
-	}
-	bt, _ := json.Marshal(result)
-	reply = codec.NewMessage(consts.MESSAGE_RESPONSE, bt, msg.Queue, headers)
-	if err := c.send(conn, reply); err != nil {
-		fmt.Printf("failed to send MESSAGE_RESPONSE for queue %s: %v", msg.Queue, err)
-	}
-}
-
-// ProcessTask handles a received task message and invokes the appropriate handler.
-func (c *Consumer) ProcessTask(ctx context.Context, msg Task) Result {
-	queue, _ := GetQueue(ctx)
-	handler, exists := c.handlers[queue]
-	if !exists {
-		return Result{Error: errors.New("No handler for queue " + queue)}
-	}
-	return handler(ctx, msg)
-}
-
-// AttemptConnect tries to establish a connection to the server, with TLS or without, based on the configuration.
-func (c *Consumer) AttemptConnect() error {
-	var err error
-	delay := c.opts.initialDelay
-	for i := 0; i < c.opts.maxRetries; i++ {
-		conn, err := GetConnection(c.opts.brokerAddr, c.opts.tlsConfig)
-		if err == nil {
-			c.conn = conn
-			return nil
-		}
-		sleepDuration := utils.CalculateJitter(delay, c.opts.jitterPercent)
-		log.Printf("CONSUMER - SUBSCRIBE ~> Failed connecting to %s (attempt %d/%d): %v, Retrying in %v...\n", c.opts.brokerAddr, i+1, c.opts.maxRetries, err, sleepDuration)
-		time.Sleep(sleepDuration)
-		delay *= 2
-		if delay > c.opts.maxBackoff {
-			delay = c.opts.maxBackoff
-		}
-	}
-
-	return fmt.Errorf("could not connect to server %s after %d attempts: %w", c.opts.brokerAddr, c.opts.maxRetries, err)
-}
-
-func (c *Consumer) readMessage(ctx context.Context, conn net.Conn) error {
-	msg, err := c.receive(conn)
-	if err == nil {
-		ctx = SetHeaders(ctx, msg.Headers)
-		c.OnMessage(ctx, msg, conn)
-		return nil
-	}
-	if err.Error() == "EOF" || strings.Contains(err.Error(), "closed network connection") {
-		c.OnClose(ctx, conn)
-		return err
-	}
-	c.OnError(ctx, conn, err)
-	return err
-}
-
-// Consume starts the consumer to consume tasks from the queues.
-func (c *Consumer) Consume(ctx context.Context) error {
-	err := c.AttemptConnect()
-	if err != nil {
-		return err
-	}
-	for _, q := range c.queues {
-		if err := c.subscribe(ctx, q); err != nil {
-			return fmt.Errorf("failed to connect to server for queue %s: %v", q, err)
-		}
-	}
-	var wg sync.WaitGroup
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		for {
-			if err := c.readMessage(ctx, c.conn); err != nil {
-				log.Println("Error reading message:", err)
-				break
-			}
-		}
-	}()
-
-	wg.Wait()
-	return nil
-}
-
-func (c *Consumer) waitForAck(conn net.Conn) error {
-	msg, err := c.receive(conn)
-	if err != nil {
-		return err
-	}
-	if msg.Command == consts.SUBSCRIBE_ACK {
-		log.Printf("CONSUMER - SUBSCRIBE_ACK ~> %s on %s", c.id, msg.Queue)
-		return nil
-	}
-	return fmt.Errorf("expected SUBSCRIBE_ACK, got: %v", msg.Command)
-}
-
-// RegisterHandler registers a handler for a queue.
-func (c *Consumer) RegisterHandler(queue string, handler Handler) {
-	c.queues = append(c.queues, queue)
-	c.handlers[queue] = handler
-}

v2/ctx.go

@@ -1,158 +0,0 @@
-package v2
-
-import (
-	"context"
-	"crypto/tls"
-	"crypto/x509"
-	"encoding/json"
-	"fmt"
-	"net"
-	"os"
-	"time"
-
-	"github.com/oarkflow/xid"
-
-	"github.com/oarkflow/mq/consts"
-)
-
-type Task struct {
-	ID          string          `json:"id"`
-	Payload     json.RawMessage `json:"payload"`
-	CreatedAt   time.Time       `json:"created_at"`
-	ProcessedAt time.Time       `json:"processed_at"`
-	Status      string          `json:"status"`
-	Error       error           `json:"error"`
-}
-
-type Handler func(context.Context, Task) Result
-
-func IsClosed(conn net.Conn) bool {
-	_, err := conn.Read(make([]byte, 1))
-	if err != nil {
-		if err == net.ErrClosed {
-			return true
-		}
-	}
-	return false
-}
-
-func SetHeaders(ctx context.Context, headers map[string]string) context.Context {
-	hd, ok := GetHeaders(ctx)
-	if !ok {
-		hd = make(map[string]string)
-	}
-	for key, val := range headers {
-		hd[key] = val
-	}
-	return context.WithValue(ctx, consts.HeaderKey, hd)
-}
-
-func WithHeaders(ctx context.Context, headers map[string]string) map[string]string {
-	hd, ok := GetHeaders(ctx)
-	if !ok {
-		hd = make(map[string]string)
-	}
-	for key, val := range headers {
-		hd[key] = val
-	}
-	return hd
-}
-
-func GetHeaders(ctx context.Context) (map[string]string, bool) {
-	headers, ok := ctx.Value(consts.HeaderKey).(map[string]string)
-	return headers, ok
-}
-
-func GetHeader(ctx context.Context, key string) (string, bool) {
-	headers, ok := ctx.Value(consts.HeaderKey).(map[string]string)
-	if !ok {
-		return "", false
-	}
-	val, ok := headers[key]
-	return val, ok
-}
-
-func GetContentType(ctx context.Context) (string, bool) {
-	headers, ok := GetHeaders(ctx)
-	if !ok {
-		return "", false
-	}
-	contentType, ok := headers[consts.ContentType]
-	return contentType, ok
-}
-
-func GetQueue(ctx context.Context) (string, bool) {
-	headers, ok := GetHeaders(ctx)
-	if !ok {
-		return "", false
-	}
-	contentType, ok := headers[consts.QueueKey]
-	return contentType, ok
-}
-
-func GetConsumerID(ctx context.Context) (string, bool) {
-	headers, ok := GetHeaders(ctx)
-	if !ok {
-		return "", false
-	}
-	contentType, ok := headers[consts.ConsumerKey]
-	return contentType, ok
-}
-
-func GetTriggerNode(ctx context.Context) (string, bool) {
-	headers, ok := GetHeaders(ctx)
-	if !ok {
-		return "", false
-	}
-	contentType, ok := headers[consts.TriggerNode]
-	return contentType, ok
-}
-
-func GetPublisherID(ctx context.Context) (string, bool) {
-	headers, ok := GetHeaders(ctx)
-	if !ok {
-		return "", false
-	}
-	contentType, ok := headers[consts.PublisherKey]
-	return contentType, ok
-}
-
-func NewID() string {
-	return xid.New().String()
-}
-
-func createTLSConnection(addr, certPath, keyPath string, caPath ...string) (net.Conn, error) {
-	cert, err := tls.LoadX509KeyPair(certPath, keyPath)
-	if err != nil {
-		return nil, fmt.Errorf("failed to load client cert/key: %w", err)
-	}
-	tlsConfig := &tls.Config{
-		Certificates:       []tls.Certificate{cert},
-		ClientAuth:         tls.RequireAndVerifyClientCert,
-		InsecureSkipVerify: true,
-	}
-	if len(caPath) > 0 && caPath[0] != "" {
-		caCert, err := os.ReadFile(caPath[0])
-		if err != nil {
-			return nil, fmt.Errorf("failed to load CA cert: %w", err)
-		}
-		caCertPool := x509.NewCertPool()
-		caCertPool.AppendCertsFromPEM(caCert)
-		tlsConfig.RootCAs = caCertPool
-		tlsConfig.ClientCAs = caCertPool
-	}
-	conn, err := tls.Dial("tcp", addr, tlsConfig)
-	if err != nil {
-		return nil, fmt.Errorf("failed to dial TLS connection: %w", err)
-	}
-
-	return conn, nil
-}
-
-func GetConnection(addr string, config TLSConfig) (net.Conn, error) {
-	if config.UseTLS {
-		return createTLSConnection(addr, config.CertPath, config.KeyPath, config.CAPath)
-	} else {
-		return net.Dial("tcp", addr)
-	}
-}

v2/options.go

@@ -1,133 +0,0 @@
-package v2
-
-import (
-	"context"
-	"encoding/json"
-	"time"
-)
-
-type Result struct {
-	Payload   json.RawMessage `json:"payload"`
-	Queue     string          `json:"queue"`
-	MessageID string          `json:"message_id"`
-	Error     error           `json:"error,omitempty"`
-	Status    string          `json:"status"`
-}
-
-type TLSConfig struct {
-	UseTLS   bool
-	CertPath string
-	KeyPath  string
-	CAPath   string
-}
-
-type Options struct {
-	syncMode         bool
-	brokerAddr       string
-	callback         []func(context.Context, Result) Result
-	maxRetries       int
-	initialDelay     time.Duration
-	maxBackoff       time.Duration
-	jitterPercent    float64
-	tlsConfig        TLSConfig
-	aesKey           json.RawMessage
-	hmacKey          json.RawMessage
-	enableEncryption bool
-	queueSize        int
-}
-
-func defaultOptions() Options {
-	return Options{
-		syncMode:      false,
-		brokerAddr:    ":8080",
-		maxRetries:    5,
-		initialDelay:  2 * time.Second,
-		maxBackoff:    20 * time.Second,
-		jitterPercent: 0.5,
-		queueSize:     100,
-	}
-}
-
-// Option defines a function type for setting options.
-type Option func(*Options)
-
-func setupOptions(opts ...Option) Options {
-	options := defaultOptions()
-	for _, opt := range opts {
-		opt(&options)
-	}
-	return options
-}
-
-func WithEncryption(aesKey, hmacKey json.RawMessage, enableEncryption bool) Option {
-	return func(opts *Options) {
-		opts.aesKey = aesKey
-		opts.hmacKey = hmacKey
-		opts.enableEncryption = enableEncryption
-	}
-}
-
-// WithBrokerURL -
-func WithBrokerURL(url string) Option {
-	return func(opts *Options) {
-		opts.brokerAddr = url
-	}
-}
-
-// WithTLS - Option to enable/disable TLS
-func WithTLS(enableTLS bool, certPath, keyPath string) Option {
-	return func(o *Options) {
-		o.tlsConfig.UseTLS = enableTLS
-		o.tlsConfig.CertPath = certPath
-		o.tlsConfig.KeyPath = keyPath
-	}
-}
-
-// WithCAPath - Option to enable/disable TLS
-func WithCAPath(caPath string) Option {
-	return func(o *Options) {
-		o.tlsConfig.CAPath = caPath
-	}
-}
-
-// WithSyncMode -
-func WithSyncMode(mode bool) Option {
-	return func(opts *Options) {
-		opts.syncMode = mode
-	}
-}
-
-// WithMaxRetries -
-func WithMaxRetries(val int) Option {
-	return func(opts *Options) {
-		opts.maxRetries = val
-	}
-}
-
-// WithInitialDelay -
-func WithInitialDelay(val time.Duration) Option {
-	return func(opts *Options) {
-		opts.initialDelay = val
-	}
-}
-
-// WithMaxBackoff -
-func WithMaxBackoff(val time.Duration) Option {
-	return func(opts *Options) {
-		opts.maxBackoff = val
-	}
-}
-
-// WithCallback -
-func WithCallback(val ...func(context.Context, Result) Result) Option {
-	return func(opts *Options) {
-		opts.callback = val
-	}
-}
-
-// WithJitterPercent -
-func WithJitterPercent(val float64) Option {
-	return func(opts *Options) {
-		opts.jitterPercent = val
-	}
-}

v2/publisher.go

@@ -1,110 +0,0 @@
-package v2
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"log"
-	"net"
-	"time"
-
-	"github.com/oarkflow/mq/codec"
-	"github.com/oarkflow/mq/consts"
-	"github.com/oarkflow/mq/jsonparser"
-)
-
-type Publisher struct {
-	id   string
-	opts Options
-}
-
-func NewPublisher(id string, opts ...Option) *Publisher {
-	options := setupOptions(opts...)
-	return &Publisher{id: id, opts: options}
-}
-
-func (p *Publisher) send(ctx context.Context, queue string, task Task, conn net.Conn, command consts.CMD) error {
-	headers := WithHeaders(ctx, map[string]string{
-		consts.PublisherKey: p.id,
-		consts.ContentType:  consts.TypeJson,
-	})
-	if task.ID == "" {
-		task.ID = NewID()
-	}
-	task.CreatedAt = time.Now()
-	payload, err := json.Marshal(task)
-	if err != nil {
-		return err
-	}
-	msg := codec.NewMessage(command, payload, queue, headers)
-	if err := codec.SendMessage(conn, msg, p.opts.aesKey, p.opts.hmacKey, p.opts.enableEncryption); err != nil {
-		return err
-	}
-
-	return p.waitForAck(conn)
-}
-
-func (p *Publisher) waitForAck(conn net.Conn) error {
-	msg, err := codec.ReadMessage(conn, p.opts.aesKey, p.opts.hmacKey, p.opts.enableEncryption)
-	if err != nil {
-		return err
-	}
-	if msg.Command == consts.PUBLISH_ACK {
-		taskID, _ := jsonparser.GetString(msg.Payload, "id")
-		log.Printf("PUBLISHER - PUBLISH_ACK ~> from %s on %s for Task %s", p.id, msg.Queue, taskID)
-		return nil
-	}
-	return fmt.Errorf("expected PUBLISH_ACK, got: %v", msg.Command)
-}
-
-func (p *Publisher) waitForResponse(conn net.Conn) Result {
-	msg, err := codec.ReadMessage(conn, p.opts.aesKey, p.opts.hmacKey, p.opts.enableEncryption)
-	if err != nil {
-		return Result{Error: err}
-	}
-	if msg.Command == consts.RESPONSE {
-		var result Result
-		err = json.Unmarshal(msg.Payload, &result)
-		return result
-	}
-	err = fmt.Errorf("expected RESPONSE, got: %v", msg.Command)
-	return Result{Error: err}
-}
-
-func (p *Publisher) Publish(ctx context.Context, task Task, queue string) error {
-	conn, err := GetConnection(p.opts.brokerAddr, p.opts.tlsConfig)
-	if err != nil {
-		return fmt.Errorf("failed to connect to broker: %w", err)
-	}
-	defer conn.Close()
-	return p.send(ctx, queue, task, conn, consts.PUBLISH)
-}
-
-func (p *Publisher) onClose(ctx context.Context, conn net.Conn) error {
-	fmt.Println("Publisher Connection closed", p.id, conn.RemoteAddr())
-	return nil
-}
-
-func (p *Publisher) onError(ctx context.Context, conn net.Conn, err error) {
-	fmt.Println("Error reading from publisher connection:", err, conn.RemoteAddr())
-}
-
-func (p *Publisher) Request(ctx context.Context, queue string, task Task) Result {
-	ctx = SetHeaders(ctx, map[string]string{
-		consts.AwaitResponseKey: "true",
-	})
-	conn, err := GetConnection(p.opts.brokerAddr, p.opts.tlsConfig)
-	if err != nil {
-		err = fmt.Errorf("failed to connect to broker: %w", err)
-		return Result{Error: err}
-	}
-	defer conn.Close()
-	err = p.send(ctx, queue, task, conn, consts.PUBLISH)
-	resultCh := make(chan Result)
-	go func() {
-		defer close(resultCh)
-		resultCh <- p.waitForResponse(conn)
-	}()
-	finalResult := <-resultCh
-	return finalResult
-}