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Add a flag to simple-game-server to shutdown after a specified number of seconds #2407

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Dec 21, 2021
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Add a flag to simple-game-server to shutdown after a specified number of seconds #2407

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18 changes: 13 additions & 5 deletions examples/simple-game-server/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,8 @@ func main() {
port := flag.String("port", "7654", "The port to listen to traffic on")
passthrough := flag.Bool("passthrough", false, "Get listening port from the SDK, rather than use the 'port' value")
readyOnStart := flag.Bool("ready", true, "Mark this GameServer as Ready on startup")
shutdownDelay := flag.Int("automaticShutdownDelayMin", 0, "If greater than zero, automatically shut down the server this many minutes after the server becomes allocated")
shutdownDelayMin := flag.Int("automaticShutdownDelayMin", 0, "[Deprecated] If greater than zero, automatically shut down the server this many minutes after the server becomes allocated (please use automaticShutdownDelaySec instead)")
shutdownDelaySec := flag.Int("automaticShutdownDelaySec", 0, "If greater than zero, automatically shut down the server this many seconds after the server becomes allocated (cannot be used if automaticShutdownDelayMin is set)")
readyDelaySec := flag.Int("readyDelaySec", 0, "If greater than zero and readyOnStart is true, wait this many seconds before marking the game server as ready")
udp := flag.Bool("udp", true, "Server will listen on UDP")
tcp := flag.Bool("tcp", false, "Server will listen on TCP")
Expand Down Expand Up @@ -107,8 +108,15 @@ func main() {
ready(s)
}

if *shutdownDelay > 0 {
shutdownAfterAllocation(s, *shutdownDelay)

if *shutdownDelayMin > 0 && *shutdownDelaySec > 0 {
log.Fatalf("Cannot set both --automaticShutdownDelayMin and --automaticShutdownDelaySec")
}
if *shutdownDelayMin > 0 {
shutdownAfterAllocation(s, *shutdownDelayMin * 60)
}
if *shutdownDelaySec > 0 {
shutdownAfterAllocation(s, *shutdownDelaySec)
}

// Prevent the program from quitting as the server is listening on goroutines.
Expand All @@ -124,12 +132,12 @@ func doSignal() {
}

// shutdownAfterAllocation creates a callback to automatically shut down
// the server a specified number of minutes after the server becomes
// the server a specified number of seconds after the server becomes
// allocated.
func shutdownAfterAllocation(s *sdk.SDK, shutdownDelay int) {
err := s.WatchGameServer(func(gs *coresdk.GameServer) {
if gs.Status.State == "Allocated" {
time.Sleep(time.Duration(shutdownDelay) * time.Minute)
time.Sleep(time.Duration(shutdownDelay) * time.Second)
shutdownErr := s.Shutdown()
if shutdownErr != nil {
log.Fatalf("Could not shutdown: %v", shutdownErr)
Expand Down