add keepalive

def.go

@@ -23,6 +23,13 @@ type ChatWarsMessage struct {
 	Text           string    `json:"text"`
 }
 
+type MQKeepAlive struct {
+	UserID64 int64     `json:"user_id"`
+	Nickname string    `json:"nick"`
+	Queue    string    `json:"queue"`
+	Date     time.Time `json:"date"`
+}
+
 const (
 	commandForwardMsg = 1
 	commandReplyMsg   = 2

main.go

@@ -131,9 +131,9 @@ func main() {
 	for w := 1; w <= 3; w++ {
 		go MQReceiveMsgWorker(w, MQTGCmdQueue)
 	}
+	go MQKeepAliveWorker()
 
 	lastOwnTDMsg = time.Now()
-
 	go ListenCW(client)
 	go ListenMQ(client, MQTGCmdQueue)
 	go ListenMe(client)

mq.go

@@ -94,3 +94,52 @@ func MQReceiveMsgWorker(id int, cmd chan<- TGCommand) {
 	log.Printf("MQReceiveMsgWorker[" + strconv.Itoa(id) + "] : Closing.")
 
 }
+
+func MQKeepAliveWorker() {
+	conn, err := amqp.Dial("amqp://" + cfg.Rabbit.User + ":" + cfg.Rabbit.Password + "@" + cfg.Rabbit.Host + "/" + cfg.Rabbit.SendQueue)
+	failOnError(err, "MQKeepAliveWorker : Failed to connect to RabbitMQ")
+	defer conn.Close()
+
+	ch, err := conn.Channel()
+	failOnError(err, "MQKeepAliveWorker : Failed to open a channel")
+	defer ch.Close()
+
+	q, err := ch.QueueDeclare(
+		"keepalive", // name
+		false,       // durable
+		false,       // delete when unused
+		false,       // exclusive
+		false,       // no-wait
+		nil,         // arguments
+	)
+	failOnError(err, "MQKeepAliveWorker : Failed to declare a queue")
+
+	for true {
+		t := time.Now()
+		m := MQKeepAlive{
+			UserID64: ownUserID64,
+			Nickname: cfg.Rabbit.User,
+			Queue:    cfg.Rabbit.ReceiveQueue,
+			Date:     t,
+		}
+		b, err := json.Marshal(m)
+		if err != nil {
+			logOnError(err, "MQKeepAliveWorker : Marshaling message.")
+		} else {
+			err = ch.Publish(
+				"",     // exchange
+				q.Name, // routing key
+				false,  // mandatory
+				false,  // immediate
+				amqp.Publishing{
+					ContentType: "application/json",
+					Body:        []byte(b),
+				})
+			if err != nil {
+				logOnError(err, "MQKeepAliveWorker : Publishing message.")
+			}
+		}
+		t.Sleep(time.Minute)
+	}
+	log.Printf("MQKeepAliveWorker : Closing.")
+}