com.alibaba.schedulerx.worker.master.scheduler.TimeScheduler Maven / Gradle / Ivy
package com.alibaba.schedulerx.worker.master.scheduler;
import com.alibaba.schedulerx.worker.log.LogFactory;
import com.alibaba.schedulerx.worker.log.Logger;
/**
* 客户端时间调度器，主要用来做秒级别任务调度
*
* @author xiaomeng.hxm
*/
public enum TimeScheduler {
INSTANCE;
private TimeQueue timeQueue = new TimeQueue();
private TimeScanThread scanThread;
private volatile boolean INITED = false;
private static final Logger LOGGER = LogFactory.getLogger(TimeScheduler.class);
public synchronized void init() {
if (!INITED) {
scanThread = new TimeScanThread("Schedulerx-TimeScanThread");
scanThread.start();
LOGGER.info("TimeScanThread started");
INITED = true;
}
}
class TimeScanThread extends Thread {
public TimeScanThread(String name) {
super(name);
}
@Override
public void run() {
while (true) {
try {
long now = System.currentTimeMillis();
while (!timeQueue.isEmpty()) {
TimePlanEntry entry = timeQueue.peek();
if (entry != null && (entry.getScheduleTimeStamp() <= now)) {
LOGGER.info("{} time ready", entry);
// 1. remove this from planQueue
timeQueue.remove();
// 2. start this time based job
submitPlan(entry);
} else {
break;
}
}
} catch (Exception e) {
LOGGER.error("", e);
}
try {
Thread.sleep(100);
} catch (InterruptedException e) {
LOGGER.error("", e);
}
}
}
}
public void add(TimePlanEntry entry) {
timeQueue.add(entry);
}
public void remove(long jobInstanceId) {
timeQueue.remove(jobInstanceId);
}
private void submitPlan(TimePlanEntry entry) {
entry.getHandler().triggerNewCycle();
}
}