功能已基本完成，现投入docker进行测试

conn.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+	"io"
+	"net"
+	"sync"
+)
+
+func handle(client net.Conn) {
+	defer client.Close()
+	queryChan := make(QueryChan)
+	ChanChan <- queryChan
+	proceed := func() {
+		server, err := net.Dial("tcp", "127.0.0.1:25565")
+		defer server.Close()
+		if err != nil {
+			GetLogger().Errorf("Failed to connect to MC server: %v", err)
+			return
+		}
+		var wg sync.WaitGroup
+		wg.Add(2)
+		go func() {
+			defer wg.Done()
+			if _, err := io.Copy(server, client); err != nil {
+				GetLogger().Errorf("Error forwarding client to server: %v", err)
+			}
+		}()
+
+		// 从服务器到客户端
+		go func() {
+			defer wg.Done()
+			if _, err := io.Copy(client, server); err != nil {
+				GetLogger().Errorf("Error forwarding server to client: %v", err)
+			}
+		}()
+
+		wg.Wait()
+		GetLogger().Infof("Connection from %s closed", client.RemoteAddr())
+	}
+	switch state {
+	case RUNNING:
+		CntChan <- INCREASE
+		defer func() { CntChan <- DECREASE }()
+		proceed()
+	case STOPPED, WAITING:
+		//	client.Write([]byte("Server not ready!"))
+		GetLogger().Warnf("Connection queued, server currently at %s state", stateToStr[state])
+		CntChan <- INCREASE
+		defer func() { CntChan <- DECREASE }()
+		<-RunningChan
+		proceed()
+	default:
+		client.Write([]byte("Server not ready!"))
+		GetLogger().Warnf("Connection refused, server currently at %s state", stateToStr[state])
+	}
+}
+func Listen() {
+	listener, _ := net.Listen("tcp", "0.0.0.0:"+config.Port)
+	defer listener.Close()
+	GetLogger().Infof("Listening on %s", config.Port)
+	for {
+		conn, err := listener.Accept()
+		if err != nil {
+			GetLogger().Errorf("ection error: %v", err)
+			continue
+		}
+
+		GetLogger().Infof("New connection from %s", conn.RemoteAddr())
+		go handle(conn)
+	}
+}

daemon.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"os"
+	"os/exec"
+	"strings"
+	"syscall"
+)
+
+var proc *exec.Cmd
+var DaemonChanRX = make(chan struct{})
+var DaemonChanTX = make(chan struct{})
+
+func Stopped() {
+	<-DaemonChanTX
+	DaemonChanRX <- struct{}{}
+	go Booting()
+}
+func Booting() {
+	GetLogger().Info("Starting MC Server")
+	arg := strings.Fields(config.StartCommand)
+	proc = exec.Command(arg[0], arg[1:]...)
+	proc.Stdout = os.Stdout
+	proc.Stderr = os.Stderr
+	proc.Start()
+	DaemonChanRX <- struct{}{}
+	GetLogger().Info("enter RUNNING state")
+	go Running()
+
+}
+func Running() {
+	<-DaemonChanTX
+	go Stopping()
+	DaemonChanRX <- struct{}{}
+}
+func Stopping() {
+	proc.Process.Signal(syscall.SIGINT)
+	proc.Wait()
+	go Stopped()
+	DaemonChanRX <- struct{}{}
+}

ds.go

@@ -19,7 +19,7 @@ func (s *Stack[T]) Pop() T {
 	if l == 0 {
 		panic("Stack: pop")
 	}
-	ret := s.items[l]
+	ret := s.items[l-1]
 	s.items = s.items[:l-1]
 	return ret
 }

fsm.go

@@ -73,7 +73,34 @@ func handleRunningToWaiting() {
 }
 
 // TODO: work with daemon
-func handleWaitingToStopping() {}
+func handleWaitingToStopping() {
+	go stoppingThread()
+	state = STOPPING
+}
+func stoppingThread() {
+	DaemonChanTX <- struct{}{}
+	<-DaemonChanRX
+	handleStoppingToStopped()
+}
+func handleStoppingToStopped() {
+	state = STOPPED
+}
+func bootingThread() {
+	DaemonChanTX <- struct{}{}
+	<-DaemonChanRX
+	handleBootingToRunning()
+}
+
+var RunningChan = make(chan struct{})
+
+func handleBootingToRunning() {
+	state = RUNNING
+	RunningChan <- struct{}{}
+}
+func handleStoppedToBooting() {
+	go bootingThread()
+	state = BOOTING
+}
 func waitingThread() {
 	defer close(waitChan)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Duration(config.Timeout)*time.Minute)
@@ -96,64 +123,98 @@ func handleState() { //goroutine only, handles both write and read
 		SIZE
 	)
 
-	selectCases := make([]reflect.SelectCase, SIZE)
-	selectCases[CHANCHAN] = reflect.SelectCase{
-		Dir:  reflect.SelectRecv, // readonly
-		Chan: reflect.ValueOf(ChanChan),
-	}
-	selectCases[EVENTCHAN] = reflect.SelectCase{
-		Dir:  reflect.SelectRecv, // readonly
-		Chan: reflect.ValueOf(eventChan),
-	}
+	selectCases := make([]reflect.SelectCase, 1)
+	//selectCases[CHANCHAN] = reflect.SelectCase{
+	//	Dir:  reflect.SelectRecv, // readonly
+	//	Chan: reflect.ValueOf(ChanChan),
+	//}
+	//selectCases[EVENTCHAN] = reflect.SelectCase{
+	//	Dir:  reflect.SelectRecv, // readonly
+	//	Chan: reflect.ValueOf(eventChan),
+	//}
 	//selectCases[CMDCHAN] = reflect.SelectCase{
 	//	Dir:  reflect.SelectRecv,
 	//	Chan: reflect.ValueOf(cmdChan),
 	//}
+	packagedChan := make(QueryChan)
+	selectCases[0] = reflect.SelectCase{
+		Dir:  reflect.SelectRecv,
+		Chan: reflect.ValueOf(packagedChan),
+	}
 	addChan := func(Chan QueryChan) {
-		logger.Debug("handleState():adding new chanchan")
+		logger.Debug("addChan(): adding new chan from chanchan")
 		nelem := reflect.SelectCase{
-			Dir:  reflect.SelectDefault,
+			Dir:  reflect.SelectRecv,
 			Chan: reflect.ValueOf(Chan),
 		}
+		logger.Debug("addChan(): done")
 		if unused.IsEmpty() {
 			selectCases = append(selectCases, nelem)
 		} else {
 			selectCases[unused.Pop()] = nelem
 		}
 	}
+	const SIGNAL = 114514
+	queryThread := func() {
+		prevId := -1
+		for {
+			id, recv, ok := reflect.Select(selectCases)
+			logger.Debugf("queryThread(): recv message from No.%d", id)
+			if prevId != -1 {
+				logger.Debug("queryThread(): clearing previous")
+				selectCases[prevId].Dir = reflect.SelectRecv
+				selectCases[prevId].Send = reflect.Value{}
+				prevId = -1
+			}
+			if !ok {
+				unused.Push(id)
+				continue
+			}
+			if id != 0 {
+				packagedChan <- MCState(recv.Int())
+				state, _ := <-packagedChan
+				selectCases[id].Dir = reflect.SelectSend
+				selectCases[id].Send = reflect.ValueOf(state)
+				prevId = id
+			}
+
+		}
+	}
+	go queryThread()
 	logger.Debug("handleState(): ready")
 	for {
-		id, recv, ok := reflect.Select(selectCases)
-		if !ok {
-			unused.Push(id)
-			continue
-		}
-		switch id {
-		case CHANCHAN:
-			nchan := *(*QueryChan)(recv.UnsafePointer())
+		select {
+		case nchan, _ := <-ChanChan:
 			addChan(nchan)
-		case EVENTCHAN:
+			packagedChan <- SIGNAL
+			//selectCases[id].Dir = reflect.SelectSend
+			//selectCases[id].Send = reflect.ValueOf(make(QueryChan))
+			//prevId = id
+		case event, _ := <-eventChan:
 			// wait until transformation finishes
-			event := globalConnEvent(recv.Int())
 			switch event {
 			case INCOMING:
 				switch state {
 				case STOPPED:
+					handleStoppedToBooting()
 				// case STOPPING: // it shouldn't be there, too, should be handled with conn.go
+				// case BOOTING: //shouldn't be there too
 				case WAITING:
 					handleWaitingToRunning()
 				default:
-					panic("handleState():written wrong!")
+					panic("handleState():written wrong!" + stateToStr[state])
 				}
 			case EMPTY:
 				switch state {
 				case RUNNING:
 					handleRunningToWaiting()
+				case BOOTING:
 				default:
-					panic("handleState():written wrong!")
+					panic("handleState():written wrong!" + stateToStr[state])
 				}
 			}
-		default:
+		case <-packagedChan:
+			packagedChan <- state
 		}
 	}
 

main.go

@@ -10,5 +10,7 @@ func main() {
 	if err := LoadConfig("config.yml"); err != nil {
 		os.Exit(1)
 	}
-
+	InitState()
+	go Stopped()
+	Listen()
 }

restart.sh

@@ -0,0 +1,4 @@
+CGO_ENABLED=0 go build -o bin/minimcd
+cd bin
+./minimcd
+cd ..

state.go

@@ -15,4 +15,7 @@ const (
 	BOOTING
 	WAITING
 	STOPPING
+	SIZE
 )
+
+var stateToStr = [SIZE]string{"STOPPED", "RUNNING", "BOOTING", "WAITING", "STOPPING"}