delayQueue延时队列-模拟简易MQ

来源：互联网发布：游族网络股票编辑：程序博客网时间：2024/06/08 20:02

package delayQueue;/* * Copyright (c) 2017 UCSMY. * All rights reserved. * Created on 2017/9/25 * Contributors: *      - initial implementation */import java.util.concurrent.DelayQueue;/** * 利用DelayQueue实现延时消息队列（简易版MQ） * * @author moss * @since 2017/9/25 */public class Producer implements  Runnable{    private DelayQueue<Message> queue;    public Producer(DelayQueue<Message> queue){        this.queue = queue;    }    @Override    public void run() {        //5秒后发送消息        Message m2 = new Message("2","Tom",5000);        queue.offer(m2);        System.out.println("消息生产者往消息队列放置消息："+m2.getId()+":"+m2.getName());        //3秒后发送消息        Message m1 = new Message("1","Tom",3000);        queue.offer(m1);        System.out.println("消息生产者往消息队列放置消息："+m1.getId()+":"+m1.getName());    }}

package delayQueue;/* * Copyright (c) 2017 UCSMY. * All rights reserved. * Created on 2017/9/25 * Contributors: *      - initial implementation */import java.util.concurrent.DelayQueue;/** * 暂无描述 * * @author moss * @since 2017/9/25 */public class Consumer implements Runnable{        private DelayQueue<Message> queue;        public Consumer(DelayQueue<Message> queue){            this.queue = queue;        }        @Override        public void run() {            while(true){                try {                    Message take = queue.take();                    System.out.println("消息需求者获取消息："+take.getId()+":"+take.getName());                } catch (InterruptedException e) {                    e.printStackTrace();                }            }        }    }
package delayQueue;/* * Copyright (c) 2017 UCSMY. * All rights reserved. * Created on 2017/9/25 * Contributors: *      - initial implementation */import java.util.concurrent.Delayed;import java.util.concurrent.TimeUnit;/** * * 1)2个小时后给用户发送短信。 2)15分钟后关闭网络连接。 3)2分钟后再次尝试回调。 * * @author ucs_gaokuixin * @since 2017/9/25 */public class Message implements Delayed {    private String id;    private String name;    private long activeTime;//执行时间    public Message(){    }    public Message(String id, String name,long activeTime) {        super();        this.id = id;        this.name = name;        this.activeTime = TimeUnit.NANOSECONDS.convert(activeTime, TimeUnit.MILLISECONDS) + System.nanoTime();    }    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @Override    public long getDelay(TimeUnit unit) {           return unit.convert(this.activeTime - System.nanoTime(), TimeUnit.NANOSECONDS);    }    @Override    public int compareTo(Delayed o) {        Message msg = (Message)o;               return Integer.valueOf(this.id)>Integer.valueOf(msg.id)?1:( Integer.valueOf(this.id)<Integer.valueOf(msg.id)?-1:0);    }}
package delayQueue;/* * Copyright (c) 2017 UCSMY. * All rights reserved. * Created on 2017/9/25 * Contributors: *      - initial implementation */import java.util.concurrent.DelayQueue;/** * 暂无描述 * * @author moss * @since 2017/9/25 */public class DelayQueueTest {    public static void main(String[] args) {        DelayQueue<Message> queue = new DelayQueue<Message>();        new Thread(new Producer(queue)).start();        new Thread(new Consumer(queue)).start();    }}
消息生产者往消息队列放置消息：2:Tom
消息生产者往消息队列放置消息：1:Tom
消息需求者获取消息：1:Tom
消息需求者获取消息：2:Tom

阅读全文

0 0