示例#1
0
func (this *Server) checkConfiguration() error {
	var err error

	this.configOnce.Do(func() {
		if this.KeepAlive == 0 {
			this.KeepAlive = DefaultKeepAlive
		}

		if this.ConnectTimeout == 0 {
			this.ConnectTimeout = DefaultConnectTimeout
		}

		if this.AckTimeout == 0 {
			this.AckTimeout = DefaultAckTimeout
		}

		if this.TimeoutRetries == 0 {
			this.TimeoutRetries = DefaultTimeoutRetries
		}

		if this.Authenticator == "" {
			this.Authenticator = "mockSuccess"
		}

		this.authMgr, err = auth.NewManager(this.Authenticator)
		if err != nil {
			return
		}

		if this.SessionsProvider == "" {
			this.SessionsProvider = "mem"
		}

		this.sessMgr, err = sessions.NewManager(this.SessionsProvider)
		if err != nil {
			return
		}

		if this.TopicsProvider == "" {
			this.TopicsProvider = "mx"
		}

		this.topicsMgr, err = topics.NewManager(this.TopicsProvider)

		return
	})

	return err
}
示例#2
0
// Connect is for MQTT clients to open a connection to a remote server. It needs to
// know the URI, e.g., "tcp://127.0.0.1:1883", so it knows where to connect to. It also
// needs to be supplied with the MQTT CONNECT message.
func (this *Client) Connect(uri string, msg *message.ConnectMessage) (err error) {
	this.checkConfiguration()

	if msg == nil {
		return fmt.Errorf("msg is nil")
	}

	u, err := url.Parse(uri)
	if err != nil {
		return err
	}

	if u.Scheme != "tcp" {
		return ErrInvalidConnectionType
	}

	conn, err := net.Dial(u.Scheme, u.Host)
	if err != nil {
		return err
	}

	defer func() {
		if err != nil {
			conn.Close()
		}
	}()

	if msg.KeepAlive() < minKeepAlive {
		msg.SetKeepAlive(minKeepAlive)
	}

	if err = writeMessage(conn, msg); err != nil {
		return err
	}

	conn.SetReadDeadline(time.Now().Add(time.Second * time.Duration(this.ConnectTimeout)))

	resp, err := getConnackMessage(conn)
	if err != nil {
		return err
	}

	if resp.ReturnCode() != message.ConnectionAccepted {
		return resp.ReturnCode()
	}

	this.svc = &service{
		id:     atomic.AddUint64(&gsvcid, 1),
		client: true,
		conn:   conn,

		keepAlive:      int(msg.KeepAlive()),
		connectTimeout: this.ConnectTimeout,
		ackTimeout:     this.AckTimeout,
		timeoutRetries: this.TimeoutRetries,
	}

	err = this.getSession(this.svc, msg, resp)
	if err != nil {
		return err
	}

	p := topics.NewMXProvider()
	topics.Register(this.svc.sess.ID(), p)

	this.svc.topicsMgr, err = topics.NewManager(this.svc.sess.ID())
	if err != nil {
		return err
	}

	if err := this.svc.start(""); err != nil {
		this.svc.stop()
		return err
	}

	this.svc.inStat.increment(int64(msg.Len()))
	this.svc.outStat.increment(int64(resp.Len()))

	return nil
}