DelayQueue的用法

package com.fit.test;import java.util.concurrent.DelayQueue;import java.util.concurrent.Delayed;import java.util.concurrent.TimeUnit;public class DelayTest {static class DelayAlarm implements Delayed {public Stringid;public longdaltime;public longdelay;public longtime;public DelayAlarm ( String id ) {this.id = id;}public DelayAlarm ( String id, long daltime, long delay ) {this.id = id;this.daltime = daltime;this.delay = delay;this.time = this.daltime + this.delay;}/** * 预期时间在前的大:return 1 */@Overridepublic int compareTo( Delayed o ) {long result = ( (DelayAlarm) o ).getTime() - this.getTime();if ( result < 0 )return 1;if ( result > 0 )return -1;return 0;}/** * 预期时间-当前时间 */@Overridepublic long getDelay( TimeUnit unit ) {return unit.convert( time * 1000L - System.currentTimeMillis(), TimeUnit.MILLISECONDS );}/** * 根据流水号删除 */@Overridepublic boolean equals( Object o ) {if ( o == null )return false;DelayAlarm a = (DelayAlarm) o;if ( null == this.getId() || null == a.getId() )return false;return this.id.equals( a.getId() );}public String getId() {return id;}public long getDaltime() {return daltime;}public long getDelay() {return delay;}public long getTime() {return time;}public String toString() {return "{id:" + id + ", daltime:" + daltime + ", delay:" + delay + " , time:" + time + "}";}}//缓存队列public static DelayQueue<DelayAlarm>queue= new DelayQueue<DelayAlarm>();//public static volatile booleanstop;public static void push( DelayAlarm a ) {if ( !queue.offer( a ) ) {System.out.println( "/- push error." );}}static class Consumer extends Thread {public void run() {while ( !stop ) {try {DelayAlarm a = queue.take();System.out.println( System.currentTimeMillis() / 1000L + "----" + a );} catch ( InterruptedException e ) {e.printStackTrace();}}}}public static void main( String[] args ) {new Consumer().start();long daltime = System.currentTimeMillis() / 1000;DelayAlarm a = new DelayAlarm( "001", daltime, 1L );DelayAlarm b = new DelayAlarm( "002", daltime, 3L );DelayAlarm c = new DelayAlarm( "003", daltime, 5L );DelayAlarm d = new DelayAlarm( "004", daltime, 2L );DelayAlarm f = new DelayAlarm( "005", daltime, 10L );push( a );push( b );push( c );push( d );push( f );//移除003的告警DelayAlarm g = new DelayAlarm( "003" );if ( queue.contains( g ) ) {queue.remove( g );}}}