示例#1
0
// For UNSUBSCRIBE message, we should remove the subscriber, and send back UNSUBACK
func (this *service) processUnsubscribe(msg *message.UnsubscribeMessage) error {
	topics := msg.Topics()

	for _, t := range topics {
		this.topicsMgr.Unsubscribe(t, &this.onpub)
		this.sess.RemoveTopic(string(t))
	}

	resp := message.NewUnsubackMessage()
	resp.SetPacketId(msg.PacketId())

	_, err := this.writeMessage(resp)
	return err
}
示例#2
0
func (this *service) unsubscribe(msg *message.UnsubscribeMessage, onComplete OnCompleteFunc) error {
	_, err := this.writeMessage(msg)
	if err != nil {
		return fmt.Errorf("(%s) Error sending %s message: %v", this.cid(), msg.Name(), err)
	}

	var onc OnCompleteFunc = func(msg, ack message.Message, err error) error {
		onComplete := onComplete

		if err != nil {
			if onComplete != nil {
				return onComplete(msg, ack, err)
			}
			return err
		}

		unsub, ok := msg.(*message.UnsubscribeMessage)
		if !ok {
			if onComplete != nil {
				return onComplete(msg, ack, fmt.Errorf("Invalid UnsubscribeMessage received"))
			}
			return nil
		}

		unsuback, ok := ack.(*message.UnsubackMessage)
		if !ok {
			if onComplete != nil {
				return onComplete(msg, ack, fmt.Errorf("Invalid UnsubackMessage received"))
			}
			return nil
		}

		if unsub.PacketId() != unsuback.PacketId() {
			if onComplete != nil {
				return onComplete(msg, ack, fmt.Errorf("Unsub and Unsuback packet ID not the same. %d != %d.", unsub.PacketId(), unsuback.PacketId()))
			}
			return nil
		}

		var err2 error = nil

		for _, tb := range unsub.Topics() {
			// Remove all subscribers, which basically it's just this client, since
			// each client has it's own topic tree.
			err := this.topicsMgr.Unsubscribe(tb, nil)
			if err != nil {
				err2 = fmt.Errorf("%v\n%v", err2, err)
			}

			this.sess.RemoveTopic(string(tb))
		}

		if onComplete != nil {
			return onComplete(msg, ack, err2)
		}

		return err2
	}

	return this.sess.Unsuback.Wait(msg, onc)
}