思路
一个线程管理所有周期任务 自身用一个比较短的时间睡眠 形成帧 利用时间差值判断某个任务是否达到了执行条件
周期任务实体
@Setter@Getter@AllArgsConstructor
class Schedule{
String name;
Runnable runnable;
long period;
public void run(){
runnable.run();
}
}
工作线程
class ManagerThread extends Thread{
long lastTime;
long frame = 50;//50ms
Node[] nodes;
@Getter@Setter
class Node{
Schedule schedule;
long delay;
public Node(Schedule schedule) {
this.schedule = schedule;
this.delay = schedule.period;
}
void resetDelay(){
this.delay = schedule.period;
}
}
public ManagerThread(Schedule... schedules) {
nodes = new Node[schedules.length];
for (int i=0;i<schedules.length;i++){
nodes[i] = new Node(schedules[i]);
}
}
long getDeltaTime(){
return System.currentTimeMillis()-lastTime;
}
@Override
public void run() {
lastTime = System.currentTimeMillis();//第一次执行
for (;;){
long now = System.currentTimeMillis();
//5x
//log.info("frame start now={} lastTime={} deltaTime={}",now,lastTime,now-lastTime);
/* 处理队列中的*/
for (int i=0;i<nodes.length;i++){
Node node = nodes[i];
if (node==null)
continue;
// log.info("{} {}",node.delay,getDeltaTime());
if ((node.delay-=getDeltaTime())>0)
continue;
node.resetDelay();
node.getSchedule().run();
//如果这里run耗时 可能会堵死整个
}
/*睡前记录*/
lastTime = System.currentTimeMillis();
try {
Thread.sleep(frame);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
测试
@Test
public void test(){
ManagerThread managerThread = new ManagerThread(
new Schedule("S1 1秒 1",()->log.info("S1"),1000L),
// new Schedule("S11 一秒 11",()->log.info("S11"),1000L),
new Schedule("S2 30秒 1",()->log.info("S2"),30000L),
new Schedule("S3 2秒 1",()->log.info("S3"),2000L),
new Schedule("S4 4秒 1",()->log.info("S4"),4000L),
new Schedule("S5 1秒 1",()->log.info("S5"),1000L)
);
managerThread.setName("managerThread");
managerThread.start();
try {
managerThread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
结果
14:27:52.767 [managerThread] INFO TestOneThreadMultiSchedule - S3
14:27:52.767 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:27:53.790 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:27:53.790 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:27:54.539 [managerThread] INFO TestOneThreadMultiSchedule - S4
14:27:54.803 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:27:54.803 [managerThread] INFO TestOneThreadMultiSchedule - S3
14:27:54.803 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:27:55.819 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:27:55.819 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:27:56.836 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:27:56.836 [managerThread] INFO TestOneThreadMultiSchedule - S3
14:27:56.836 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:27:57.853 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:27:57.853 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:27:58.547 [managerThread] INFO TestOneThreadMultiSchedule - S4
14:27:58.869 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:27:58.869 [managerThread] INFO TestOneThreadMultiSchedule - S3
14:27:58.869 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:27:59.879 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:27:59.879 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:28:00.414 [managerThread] INFO TestOneThreadMultiSchedule - S2
14:28:00.892 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:28:00.893 [managerThread] INFO TestOneThreadMultiSchedule - S3
14:28:00.893 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:28:01.916 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:28:01.916 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:28:02.559 [managerThread] INFO TestOneThreadMultiSchedule - S4
14:28:02.930 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:28:02.930 [managerThread] INFO TestOneThreadMultiSchedule - S3
14:28:02.930 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:28:03.948 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:28:03.948 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:28:04.970 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:28:04.970 [managerThread] INFO TestOneThreadMultiSchedule - S3
14:28:04.971 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:28:05.981 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:28:05.982 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:28:06.566 [managerThread] INFO TestOneThreadMultiSchedule - S4
14:28:06.997 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:28:06.997 [managerThread] INFO TestOneThreadMultiSchedule - S3
14:28:06.997 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:28:08.007 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:28:08.007 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:28:09.030 [managerThread] INFO TestOneThreadMultiSchedule - S1
14:28:09.030 [managerThread] INFO TestOneThreadMultiSchedule - S3
14:28:09.030 [managerThread] INFO TestOneThreadMultiSchedule - S5
14:28:10.043 [managerThread] INFO TestOneThreadMultiSchedule - S1
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