package project.data.websocket.utils;

import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;

public class IdGenerator {
	
	private static AtomicInteger COUNTER = new AtomicInteger();

	private static Set<Long> TIME_SET = new HashSet<>();

	public static Long getNextId() {
		Long time = System.currentTimeMillis();
		if (!TIME_SET.contains(time)) {
			COUNTER.set(0);
			TIME_SET.clear();
			TIME_SET.add(time);
		}

		Long id = (time * 1000) + COUNTER.addAndGet(1);
		return id;
	}
}