Golang Config.ConnectionTimeout方法代码示例

// initBroker() sets up the connection to the RabbitMQ broker
func initBroker(orig_ctx Context) (ctx Context, err error) {
	defer func() {
		if e := recover(); e != nil {
			err = fmt.Errorf("initBroker() -> %v", e)
		}
		ctx.Channels.Log <- mig.Log{Desc: "leaving initBroker()"}.Debug()
	}()

	ctx = orig_ctx
	// dialing address use format "<scheme>://<user>:<pass>@<host>:<port><vhost>"
	var scheme, user, pass, host, port, vhost string
	if ctx.MQ.UseTLS {
		scheme = "amqps"
	} else {
		scheme = "amqp"
	}
	if ctx.MQ.User == "" {
		panic("MQ User is missing")
	}
	user = ctx.MQ.User
	if ctx.MQ.Pass == "" {
		panic("MQ Pass is missing")
	}
	pass = ctx.MQ.Pass
	if ctx.MQ.Host == "" {
		panic("MQ Host is missing")
	}
	host = ctx.MQ.Host
	if ctx.MQ.Port < 1 {
		panic("MQ Port is missing")
	}
	port = fmt.Sprintf("%d", ctx.MQ.Port)
	vhost = ctx.MQ.Vhost
	dialaddr := scheme + "://" + user + ":" + pass + "@" + host + ":" + port + "/" + vhost

	if ctx.MQ.Timeout == "" {
		ctx.MQ.Timeout = "600s"
	}
	timeout, err := time.ParseDuration(ctx.MQ.Timeout)
	if err != nil {
		panic("Failed to parse timeout duration")
	}

	// create an AMQP configuration with specific timers
	var dialConfig amqp.Config
	dialConfig.ConnectionTimeout = timeout
	dialConfig.Heartbeat = timeout

	// create the TLS configuration
	if ctx.MQ.UseTLS {
		// import the client certificates
		cert, err := tls.LoadX509KeyPair(ctx.MQ.TLScert, ctx.MQ.TLSkey)
		if err != nil {
			panic(err)
		}

		// import the ca cert
		data, err := ioutil.ReadFile(ctx.MQ.CAcert)
		ca := x509.NewCertPool()
		if ok := ca.AppendCertsFromPEM(data); !ok {
			panic("failed to import CA Certificate")
		}
		TLSconfig := tls.Config{Certificates: []tls.Certificate{cert},
			RootCAs:            ca,
			InsecureSkipVerify: false,
			Rand:               rand.Reader}

		dialConfig.TLSClientConfig = &TLSconfig

	}

	// Setup the AMQP broker connection
	ctx.MQ.conn, err = amqp.DialConfig(dialaddr, dialConfig)
	if err != nil {
		panic(err)
	}

	ctx.MQ.Chan, err = ctx.MQ.conn.Channel()
	if err != nil {
		panic(err)
	}
	// declare the "mig" exchange used for all publications
	err = ctx.MQ.Chan.ExchangeDeclare("mig", "topic", true, false, false, false, nil)
	if err != nil {
		panic(err)
	}

	ctx.Channels.Log <- mig.Log{Sev: "info", Desc: "AMQP connection opened"}
	return
}

func initMQ(orig_ctx Context) (ctx Context, err error) {
	ctx = orig_ctx
	defer func() {
		if e := recover(); e != nil {
			err = fmt.Errorf("initMQ() -> %v", e)
		}
		ctx.Channels.Log <- mig.Log{Desc: "leaving initMQ()"}.Debug()
	}()

	//Define the AMQP binding
	ctx.MQ.Bind.Queue = fmt.Sprintf("mig.agt.%s", ctx.Agent.QueueLoc)
	ctx.MQ.Bind.Key = fmt.Sprintf("mig.agt.%s", ctx.Agent.QueueLoc)

	// parse the dial string and use TLS if using amqps
	if strings.Contains(AMQPBROKER, "amqps://") {
		ctx.MQ.UseTLS = true
	}

	// create an AMQP configuration with specific timers
	var dialConfig amqp.Config
	dialConfig.ConnectionTimeout = 10 * ctx.Sleeper
	dialConfig.Heartbeat = 2 * ctx.Sleeper

	if ctx.MQ.UseTLS {
		// import the client certificates
		cert, err := tls.X509KeyPair([]byte(AGENTCERT), []byte(AGENTKEY))
		if err != nil {
			panic(err)
		}

		// import the ca cert
		ca := x509.NewCertPool()
		if ok := ca.AppendCertsFromPEM([]byte(CACERT)); !ok {
			panic("failed to import CA Certificate")
		}
		TLSconfig := tls.Config{Certificates: []tls.Certificate{cert},
			RootCAs:            ca,
			InsecureSkipVerify: false,
			Rand:               rand.Reader}

		dialConfig.TLSClientConfig = &TLSconfig
	}
	// Open a non-encrypted AMQP connection
	ctx.MQ.conn, err = amqp.DialConfig(AMQPBROKER, dialConfig)
	if err != nil {
		panic(err)
	}

	ctx.MQ.Chan, err = ctx.MQ.conn.Channel()
	if err != nil {
		panic(err)
	}

	// Limit the number of message the channel will receive at once
	err = ctx.MQ.Chan.Qos(7, // prefetch count (in # of msg)
		0,     // prefetch size (in bytes)
		false) // is global

	_, err = ctx.MQ.Chan.QueueDeclare(ctx.MQ.Bind.Queue, // Queue name
		true,  // is durable
		false, // is autoDelete
		false, // is exclusive
		false, // is noWait
		nil)   // AMQP args
	if err != nil {
		panic(err)
	}

	err = ctx.MQ.Chan.QueueBind(ctx.MQ.Bind.Queue, // Queue name
		ctx.MQ.Bind.Key, // Routing key name
		"mig",           // Exchange name
		false,           // is noWait
		nil)             // AMQP args
	if err != nil {
		panic(err)
	}

	// Consume AMQP message into channel
	ctx.MQ.Bind.Chan, err = ctx.MQ.Chan.Consume(ctx.MQ.Bind.Queue, // queue name
		"",    // some tag
		false, // is autoAck
		false, // is exclusive
		false, // is noLocal
		false, // is noWait
		nil)   // AMQP args
	if err != nil {
		panic(err)
	}

	return
}