Re: Q: Singleton in a server environment

Casper wrote:


Static variables are shared across ALL threads of ALL instances of the
VM, so your vanilla singleton would be shared by all connections.

Per your second question, I think it would be easiest to use something
like this: (Don't actually use this: it horribly leaks memory).

public class Singleton {
    private Map<Integer, Singleton> things;

    private Singleton() {}
    public static Singleton getSingleton(int client_id) {
        if (things.get(client_id) == null)
            things.put(client_id, new Singleton());
        return things.get(client_id);
    }
}