DelayQueue

最新推荐文章于 2025-08-03 15:49:09 发布

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package concurrentTest;

import java.util.concurrent.DelayQueue;
import java.util.concurrent.Delayed;
import java.util.concurrent.TimeUnit;

/**
 * Created by mashao on 15/9/23.
 */
public class TestDelayQueue {

    static class Element implements Delayed {

        private long trigger;

        private int id;

        public long getTrigger() {
            return this.trigger;
        }

        public int getId() {
            return this.id;
        }

        Element(long i, int id) {
            trigger = System.currentTimeMillis() + i;
            this.id = id;
        }

        public long getDelay(TimeUnit unit) {
            return trigger - System.currentTimeMillis();
        }

        public int compareTo(Delayed o) {
            return (int)(this.getDelay(TimeUnit.MILLISECONDS) - o.getDelay(TimeUnit.MILLISECONDS));
        }
    }

    public static void main(String[] args) {
        DelayQueue<Element> queue = new DelayQueue<Element>();
        queue.add(new Element(1000L, 1));
        queue.add(new Element(500L, 2));
        long start = System.currentTimeMillis();
        while (!queue.isEmpty()) {
            try {
                Element element = queue.take();
                long period = System.currentTimeMillis() - start;
                System.out.println(period + ":" + element.getId());
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

        }
    }
}