func main() {
game := lib2048.NewGame2048()
r := game.GetRand()
for i := 0; i < 100; i++ {
fmt.Println(r.Int() % 4)
}
fmt.Println(game.String())
for !game.IsGameOver() {
var input string
fmt.Scanf("%s", &input)
var dir lib2048.Direction
switch input {
case "w":
dir = lib2048.Up
case "a":
dir = lib2048.Left
case "s":
dir = lib2048.Down
case "d":
dir = lib2048.Right
}
game.MakeMove(dir)
fmt.Println(game.String())
}
}
func CalculateGameState(initial lib2048.Game2048, moves []*lib2048.Move) lib2048.Game2048 {
game := lib2048.NewGame2048()
game.CloneFrom(initial)
for _, m := range moves {
game.MakeMove(m.Direction)
}
return game
}
func NewCClient(cservAddr string, gameServHostPort string, interval int) (Cclient, error) {
ws, err := doConnect(cservAddr, gameServHostPort)
if err != nil {
return nil, err
}
game := lib2048.NewGame2048()
cc := &cclient{
ws,
game,
make([]lib2048.Direction, 0),
make(chan int),
make(chan int),
make(chan int),
make(chan int),
make(chan util.ClientMove),
cservAddr,
}
// Fire the ticker
ticker := time.NewTicker(time.Duration(interval) * time.Millisecond)
go cc.tickHandler(ticker)
go cc.websocketHandler()
return cc, nil
}
func (s *Game2048State) String() string {
game := lib2048.NewGame2048()
game.SetGrid(s.Grid)
game.SetScore(s.Score)
return fmt.Sprintf("%sWon: %s\nOver: %s\n", game.String(), s.Won, s.Over)
}
// NewGameServer creates an instance of a Game Server. It does not return
// until it has successfully joined the cluster of game servers and started
// its libpaxos service.
func NewGameServer(centralServerHostPort, hostname string, port int, pattern string) (GameServer, error) {
// RPC Dial to the central server to join the ring
c, err := rpc.DialHTTP("tcp", centralServerHostPort)
if err != nil {
fmt.Println("Could not connect to central server host port via RPC")
fmt.Println(err)
return nil, err
}
// Register myself with the central server, obtaining my ID, and a
// complete list of all servers in the ring.
gshostport := fmt.Sprintf("%s:%d", hostname, port)
args := ¢ralrpc.RegisterGameServerArgs{gshostport}
var reply centralrpc.RegisterGameServerReply
reply.Status = centralrpc.NotReady
for reply.Status != centralrpc.OK {
err = c.Call("CentralServer.RegisterGameServer", args, &reply)
if err != nil {
fmt.Println("Could not RPC call method CentralServer.RegisterGameServer")
fmt.Println(err)
return nil, err
}
if reply.Status == centralrpc.Full {
return nil, errors.New("Could not register with central server, ring FULL")
}
time.Sleep(REGISTER_RETRY_INTERVAL * time.Millisecond)
}
// Start the libpaxos service
newlibpaxos, err := libpaxos.NewLibpaxos(reply.GameServerID, gshostport, reply.Servers)
if err != nil {
fmt.Println("Could not start libpaxos")
fmt.Println(err)
return nil, err
}
// Websockets client related stuff
clients := make(map[int]*client)
addCh := make(chan *client)
delCh := make(chan *client)
doneCh := make(chan bool)
errCh := make(chan error)
// Debugging setup
var vOut, eOut io.Writer
if LOG_TO_FILE {
now := time.Now().String()
var err1, err2 error
vOut, err1 = os.Create(fmt.Sprintf("%d_debug_%s.log", reply.GameServerID, now))
eOut, err2 = os.Create(fmt.Sprintf("%d_error_%s.log", reply.GameServerID, now))
if err1 != nil || err2 != nil {
panic(err)
}
} else {
vOut = os.Stdout
eOut = os.Stderr
}
LOGV = util.NewLogger(DEBUG_LOG, "DEBUG", vOut)
LOGE = util.NewLogger(ERROR_LOG, "ERROR", eOut)
gs := &gameServer{
reply.GameServerID,
hostname,
port,
gshostport,
newlibpaxos,
pattern,
sync.Mutex{},
clients,
addCh,
delCh,
doneCh,
errCh,
0,
make(chan *paxosrpc.ProposalValue, 1000),
len(reply.Servers),
lib2048.NewGame2048(),
make(chan *util.Game2048State, 1000),
make(chan *lib2048.Move, 1000),
}
gs.libpaxos.DecidedHandler(gs.handleDecided)
LOGV.Printf("GS node %d loaded libpaxos\n", reply.GameServerID)
go gs.ListenForClients()
go gs.processMoves()
go gs.clientTasker()
go gs.clientMasterHandler()
return gs, nil
}
// Takes a set of moves, finds the majority, manipulates the local game, and
// tells the clientTasker to broadcast that state
func (gs *gameServer) processMoves() {
sizeQueue := make([]int, 0)
pendingMoves := make([]lib2048.Move, 0)
currentBucketSize := 0
for {
select {
case proposal := <-gs.newMovesCh:
moves := proposal.Moves
pendingMoves = append(pendingMoves, moves...)
if currentBucketSize == 0 {
currentBucketSize = len(moves)
} else {
sizeQueue = append(sizeQueue, len(moves))
}
requiredMoves := currentBucketSize * gs.totalNumGameServers
if len(pendingMoves) >= requiredMoves {
// Find the majority of the first $requiredMoves moves
dirVotes := make(map[lib2048.Direction]int)
dirVotes[lib2048.Up] = 0
dirVotes[lib2048.Down] = 0
dirVotes[lib2048.Left] = 0
dirVotes[lib2048.Right] = 0
pendingMovesSubset := pendingMoves[:requiredMoves]
pendingMoves = pendingMoves[requiredMoves:]
for _, move := range pendingMovesSubset {
dirVotes[move.Direction]++
}
LOGV.Println("GAME SERVER", gs.id, "currentBucketSize", currentBucketSize)
LOGV.Println("GAME SERVER", gs.id, "pendingMovesSubset", util.MovesString(pendingMovesSubset))
var majorityDir lib2048.Direction
maxVotes := 0
for dir, votes := range dirVotes {
if votes > maxVotes {
maxVotes = votes
majorityDir = dir
} else if votes == maxVotes && dir > majorityDir {
majorityDir = dir
}
}
LOGV.Println("GAME SERVER", gs.id, "got majority direction:", majorityDir)
// Update the 2048 state
gs.game2048.MakeMove(majorityDir)
if gs.game2048.IsGameOver() {
gs.game2048 = lib2048.NewGame2048()
}
state := gs.getWrappedState(&majorityDir)
gs.stateBroadcastCh <- state
// Update the bucket size
if len(sizeQueue) > 0 {
currentBucketSize = sizeQueue[0]
sizeQueue = sizeQueue[1:]
}
}
}
}
}
