// For SUBSCRIBE message, we should add subscriber, then send back SUBACK
func (this *service) processSubscribe(msg *message.SubscribeMessage) error {
resp := message.NewSubackMessage()
resp.SetPacketId(msg.PacketId())
// Subscribe to the different topics
var retcodes []byte
topics := msg.Topics()
qos := msg.Qos()
this.rmsgs = this.rmsgs[0:0]
for i, t := range topics {
rqos, err := this.topicsMgr.Subscribe(t, qos[i], &this.onpub)
if err != nil {
return err
}
this.sess.AddTopic(string(t), qos[i])
retcodes = append(retcodes, rqos)
// yeah I am not checking errors here. If there's an error we don't want the
// subscription to stop, just let it go.
this.topicsMgr.Retained(t, &this.rmsgs)
glog.Debugf("(%s) topic = %s, retained count = %d", this.cid(), string(t), len(this.rmsgs))
}
if err := resp.AddReturnCodes(retcodes); err != nil {
return err
}
if _, err := this.writeMessage(resp); err != nil {
return err
}
for _, rm := range this.rmsgs {
if err := this.publish(rm, nil); err != nil {
glog.Errorf("service/processSubscribe: Error publishing retained message: %v", err)
return err
}
}
return nil
}
// For SUBSCRIBE message, we should add subscriber, then send back SUBACK
func (this *service) processSubscribe(msg *message.SubscribeMessage) error {
resp := message.NewSubackMessage()
resp.SetPacketId(msg.PacketId())
// Subscribe to the different topics
var retcodes []byte
topics := msg.Topics()
qos := msg.Qos()
// fmt.Printf("this.id: %d, this.sess.ID(): %s\n", this.id, this.cid())
for i, t := range topics {
rqos, err := this.topicsMgr.Subscribe(t, qos[i], &this.onpub, this.sess.ID())
// rqos, err := this.topicsMgr.Subscribe(t, qos[i], &this)
if err != nil {
Log.Errorc(func() string {
return fmt.Sprintf("(%s) subscribe topic %s failed: %s", this.cid(), t, err)
})
this.stop()
return err
}
Log.Infoc(func() string {
return fmt.Sprintf("(%s) subscribe topic %s", this.cid(), t)
})
this.sess.AddTopic(string(t), qos[i])
retcodes = append(retcodes, rqos)
}
if err := resp.AddReturnCodes(retcodes); err != nil {
return err
}
if _, err := this.writeMessage(resp); err != nil {
return err
}
for _, t := range topics {
go this.pushOfflineMessage(string(t))
}
return nil
}