func (self *MyConnection) Subscribe(topic string, QoS int) error {
sb := codec.NewSubscribeMessage()
sb.Payload = append(sb.Payload, codec.SubscribePayload{
TopicPath: topic,
RequestedQos: uint8(QoS),
})
id := self.InflightTable.NewId()
sb.PacketIdentifier = id
self.InflightTable.Register(id, sb, nil)
self.SubscribeHistory[topic] = QoS
if v, ok := self.Events["subscribe"]; ok {
if cb, ok := v.(func(*codec.SubscribeMessage, Connection)); ok {
cb(sb, self)
}
}
state := self.GetState()
if state == STATE_CONNECTED || state == STATE_CONNECTING {
self.writeMessage(sb)
} else {
self.OfflineQueue = append([]codec.Message{sb}, self.OfflineQueue...)
}
return nil
}
func (s *DummyPlugSuite) TestDummyPlug(c *C) {
engine := CreateEngine()
// 2) Running Engine
go engine.Run()
p := NewDummyPlug(engine)
p.Switch <- true
mux := NewMmuxConnection()
p.SetState(STATE_CONNECTED)
mux.DisableCleanSession()
mux.SetId(p.GetId())
mux.Attach(p)
// Memo: Normally, engine has correct relation ship between mux and iteself. this is only need for test
engine.Connections[p.GetId()] = mux
sub := mqtt.NewSubscribeMessage()
sub.Payload = append(sub.Payload, mqtt.SubscribePayload{
TopicPath: "/debug/1",
RequestedQos: uint8(1),
})
sub.Payload = append(sub.Payload, mqtt.SubscribePayload{
TopicPath: "/debug/2",
RequestedQos: uint8(2),
})
sub.PacketIdentifier = 1
engine.Subscribe(sub, mux)
pub := mqtt.NewPublishMessage()
pub.TopicName = "/debug/1"
pub.Payload = []byte("hello")
pub.QosLevel = 1
engine.SendPublishMessage(pub, "dummy", false)
pub = mqtt.NewPublishMessage()
pub.TopicName = "/debug/2"
pub.Payload = []byte("hello")
pub.QosLevel = 2
engine.SendPublishMessage(pub, "dummy", false)
// TODO: How do i test this?
}
func (s *EngineSuite) TestBasic(c *C) {
log.SetupLogging("error", "stdout")
// This test introduce how to setup custom MQTT server
// 1) You need to setup Momonga engine like this.
engine := CreateEngine()
// 2) Running Engine
go engine.Run()
// 3) engine expects net.Conn (see MockConnection)
mock := &MockConnection{}
conn := NewMyConnection(nil)
conn.SetMyConnection(mock)
conn.SetId("debug")
// 4) setup handler. This handler implementation is example.
// you can customize behaviour with On method.
hndr := NewHandler(conn, engine)
conn.SetOpaque(hndr)
// 5) Now,
msg := codec.NewConnectMessage()
msg.Magic = []byte("MQTT")
msg.Version = uint8(4)
msg.Identifier = "debug"
msg.CleanSession = true
msg.KeepAlive = uint16(0) // Ping is annoyed at this time
codec.WriteMessageTo(msg, mock)
// 6) just call conn.ParseMessage(). then handler will work.
r, err := conn.ParseMessage()
c.Assert(err, Equals, nil)
c.Assert(r.GetType(), Equals, codec.PACKET_TYPE_CONNECT)
// NOTE: Client turn. don't care this.
time.Sleep(time.Millisecond)
r, err = conn.ParseMessage()
c.Assert(err, Equals, nil)
c.Assert(r.GetType(), Equals, codec.PACKET_TYPE_CONNACK)
// Subscribe
sub := codec.NewSubscribeMessage()
sub.Payload = append(sub.Payload, codec.SubscribePayload{TopicPath: "/debug"})
sub.PacketIdentifier = 1
codec.WriteMessageTo(sub, mock)
// (Server)
r, err = conn.ParseMessage()
c.Assert(err, Equals, nil)
c.Assert(r.GetType(), Equals, codec.PACKET_TYPE_SUBSCRIBE)
rsub := r.(*codec.SubscribeMessage)
c.Assert(rsub.PacketIdentifier, Equals, uint16(1))
c.Assert(rsub.Payload[0].TopicPath, Equals, "/debug")
// (Client) suback
time.Sleep(time.Millisecond)
r, err = conn.ParseMessage()
c.Assert(err, Equals, nil)
c.Assert(r.GetType(), Equals, codec.PACKET_TYPE_SUBACK)
// (Client) Publish
pub := codec.NewPublishMessage()
pub.TopicName = "/debug"
pub.Payload = []byte("hello")
codec.WriteMessageTo(pub, mock)
// (Server)
r, err = conn.ParseMessage()
c.Assert(err, Equals, nil)
c.Assert(r.GetType(), Equals, codec.PACKET_TYPE_PUBLISH)
rpub := r.(*codec.PublishMessage)
c.Assert(rpub.TopicName, Equals, "/debug")
// (Client) received publish message
time.Sleep(time.Millisecond)
r, err = conn.ParseMessage()
rp := r.(*codec.PublishMessage)
c.Assert(err, Equals, nil)
c.Assert(r.GetType(), Equals, codec.PACKET_TYPE_PUBLISH)
c.Assert(rp.TopicName, Equals, "/debug")
c.Assert(string(rp.Payload), Equals, "hello")
// okay, now disconnect from server
dis := codec.NewDisconnectMessage()
codec.WriteMessageTo(dis, mock)
r, err = conn.ParseMessage()
c.Assert(err, Equals, nil)
c.Assert(r.GetType(), Equals, codec.PACKET_TYPE_DISCONNECT)
// then, receive EOF from server.
time.Sleep(time.Millisecond)
r, err = conn.ParseMessage()
c.Assert(err, Equals, nil)
// That's it.
engine.Terminate()
}