We are meeting one strange thing when we do testing on GAE.
The problem is that we implemented a GameCenter class as below.
It is a singleton class in system, but we found it always initialize
multiple instances based on logs.
Please check the source code and info log below.
Could you explain why it happens and how to resolve it?
Source Code:
public class GameCenter implements IGameCenter {
static final long serialVersionUID = -1L;
private static GameCenter instance = null;
private long instanceNumber = -1;
private GameCenter() {
instanceNumber = System.currentTimeMillis();
initRoom();
hostClientProxy = new HostClientProxyImpl();
chatCenter = new ChatCenter(null);
log.info("GameCenter constructor--- : " + instanceNumber);
dataVersion = 0;
}
public static synchronized GameCenter getInstance() {
if(instance == null){
instance =new GameCenter();
}
return instance;
}
}
Info Log in GAE:
04-05 07:29AM 47.910 GameCenter <init>: GameCenter constructor--- :
1270477784633
04-05 07:27AM 48.654 GameCenter <init>: GameCenter constructor--- :
1270477664172
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