定时任务框架

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ScheduleIterator接口 import java.util.Date;public interface ScheduleIterator { public Date next();//获取下一个触发的时间点} Scheduler类 import java.

定时任务框架代码。
整个框架就3个类:

  • ScheduleIterator.java
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import java.util.Date;

public interface ScheduleIterator {
Date next();
}
  • Scheduler.java
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import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

public class Scheduler {
class SchedulerTimerTask extends TimerTask {
private SchedulerTask schedulerTask;
private ScheduleIterator iterator;

public SchedulerTimerTask(SchedulerTask schedulerTask, ScheduleIterator iterator) {
this.schedulerTask = schedulerTask;
this.iterator = iterator;
}

public void run() {
schedulerTask.run();
reschedule(schedulerTask, iterator);
}
}

private final Timer timer = new Timer();

public Scheduler() {
}

public void cancel() {
timer.cancel();
}

public void schedule(SchedulerTask schedulerTask, ScheduleIterator iterator) {

Date time = iterator.next();
if (time == null) {
schedulerTask.cancel();
} else {
synchronized (schedulerTask.lock) {
if (schedulerTask.state != SchedulerTask.VIRGIN) {
throw new IllegalStateException("Task already scheduled or cancelled");
}
schedulerTask.state = SchedulerTask.SCHEDULED;
schedulerTask.timerTask = new SchedulerTimerTask(schedulerTask, iterator);
timer.schedule(schedulerTask.timerTask, time);
}
}
}

private void reschedule(SchedulerTask schedulerTask, ScheduleIterator iterator) {

Date time = iterator.next();
if (time == null) {
schedulerTask.cancel();
} else {
synchronized (schedulerTask.lock) {
if (schedulerTask.state != SchedulerTask.CANCELLED) {
schedulerTask.timerTask = new SchedulerTimerTask(schedulerTask, iterator);
timer.schedule(schedulerTask.timerTask, time);
}
}
}
}

}
  • SchedulerTask.java
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import java.util.TimerTask;

public abstract class SchedulerTask implements Runnable {
final Object lock = new Object();

int state = VIRGIN;
static final int VIRGIN = 0;
static final int SCHEDULED = 1;
static final int CANCELLED = 2;

TimerTask timerTask;

protected SchedulerTask() {
}

public abstract void run();

public boolean cancel() {
synchronized (lock) {
if (timerTask != null) {
timerTask.cancel();
}
boolean result = (state == SCHEDULED);
state = CANCELLED;
return result;
}
}

public long scheduledExecutionTime() {
synchronized (lock) {
return timerTask == null ? 0 : timerTask.scheduledExecutionTime();
}
}

}

自己写的ScheduleIterator 实现类 以及一个测试类

  • SimpleScheduleIterator.java
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import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

import com.jeecms.common.task.scheduling.ScheduleIterator;

/**
* 时间进度迭代器 <li>返回 月/周/天/小时/分钟/秒 计划的下一次执行时间</li> <li>约定:参数以逗号分隔,*号表示无值</li> <li>
* 参数解释: <br>
* 第一位:每个月的第几周</br> <br>
* 第二位:每周的第几天</br> <br>
* 第三位:天(几号)</br> <br>
* 第四位:小时(24小时制)</br> <br>
* 第五位:分钟</br> <br>
* 第六位:秒</br></li> <li>参数样例: <br>
* 1,6,4,15,20,30 表示 从今天的15:20:30开始,每隔一个月执行一次,即下次执行时间是 下个月的第一周的第6天的15:20:30</br>
* <br>
* *,6,4,15,20,30 表示 从今天的15:20:30开始,每隔一周执行一次,即下次执行时间是 下一周的第6天的15:20:30</br> <br>
* *,*,4,15,20,30 表示 从今天的15:20:30开始,每隔一天执行一次,即下次执行时间是 下一天的15:20:30</br> <br>
* *,*,*,15,20,30 表示 从今天的15:20:30开始,每隔一小时执行一次,即下次执行时间是 16:20:30</br> <br>
* *,*,*,*,20,30 表示 从这个小时的20:30开始,每隔一分钟执行一次,即下次执行时间是 *:21:30</br> <br>
* *,*,*,*,*,30 表示 从当前时间的30秒开始,每隔一秒执行一次,即下次执行时间是 *:*:31</br></li>
*
* @author javacoo
* @since 2011-11-03
*/
public class SimpleScheduleIterator implements ScheduleIterator {
private final ScheduleParamBean scheduleParamBean;
private final Calendar calendar = Calendar.getInstance();
private final Calendar orginCalendar = Calendar.getInstance();

public SimpleScheduleIterator(final ScheduleParamBean scheduleParamBean) {
this(scheduleParamBean, new Date());
}

public SimpleScheduleIterator(final ScheduleParamBean scheduleParamBean, Date date) {
this.scheduleParamBean = scheduleParamBean;

orginCalendar.setTime(date);
calendar.setTime(date);
if (null != scheduleParamBean.getWeekOfMonth()) {
calendar.set(Calendar.WEEK_OF_MONTH, scheduleParamBean.getWeekOfMonth());
}
// 如果设置了每周的第几天和一个月的第几天,则忽略一个月的第几天
if (null != scheduleParamBean.getDayOfWeek()) {
calendar.set(Calendar.DAY_OF_WEEK, scheduleParamBean.getDayOfWeek());
} else if (null != scheduleParamBean.getDayOfMonth()) {
calendar.set(Calendar.DAY_OF_MONTH, scheduleParamBean.getDayOfMonth());
}
if (null != scheduleParamBean.getHourOfDay()) {
calendar.set(Calendar.HOUR_OF_DAY, scheduleParamBean.getHourOfDay());
}
if (null != scheduleParamBean.getMinute()) {
calendar.set(Calendar.MINUTE, scheduleParamBean.getMinute());
}
if (null != scheduleParamBean.getSecond()) {
calendar.set(Calendar.SECOND, scheduleParamBean.getSecond());
}
calendar.set(Calendar.MILLISECOND, 0);

if (!calendar.getTime().before(date)) {
System.out.println(calendar.getTime() + "大于当前时间:" + date);
if (null != scheduleParamBean.getWeekOfMonth()) {
calendar.add(Calendar.MONTH, -1);
} else if (null != scheduleParamBean.getDayOfWeek()) {
calendar.add(Calendar.DAY_OF_WEEK, -6);
} else if (null != scheduleParamBean.getDayOfMonth()) {
calendar.add(Calendar.DAY_OF_MONTH, -1);
} else if (null != scheduleParamBean.getHourOfDay()) {
calendar.add(Calendar.HOUR_OF_DAY, -1);
} else if (null != scheduleParamBean.getMinute()) {
calendar.add(Calendar.MINUTE, -1);
} else if (null != scheduleParamBean.getSecond()) {
calendar.add(Calendar.SECOND, -1);
}
} else {
System.out.println(calendar.getTime() + "小于当前时间:" + date);
if (null != scheduleParamBean.getDayOfMonth()) {
calendar.add(Calendar.DAY_OF_MONTH, orginCalendar.get(Calendar.DAY_OF_MONTH) - scheduleParamBean.getDayOfMonth());
} else if (null != scheduleParamBean.getHourOfDay()) {
calendar.add(Calendar.HOUR_OF_DAY, orginCalendar.get(Calendar.HOUR_OF_DAY) - scheduleParamBean.getHourOfDay());
} else if (null != scheduleParamBean.getMinute()) {
calendar.add(Calendar.MINUTE, orginCalendar.get(Calendar.MINUTE) - scheduleParamBean.getMinute());
} else if (null != scheduleParamBean.getSecond()) {
calendar.add(Calendar.SECOND, orginCalendar.get(Calendar.SECOND) - scheduleParamBean.getSecond());
}
}
}

public Date next() {
if (null != scheduleParamBean.getWeekOfMonth()) {
calendar.add(Calendar.MONTH, 1);
} else if (null != scheduleParamBean.getDayOfWeek()) {
calendar.add(Calendar.DAY_OF_WEEK, 6);
} else if (null != scheduleParamBean.getDayOfMonth()) {
calendar.add(Calendar.DAY_OF_MONTH, 1);
} else if (null != scheduleParamBean.getHourOfDay()) {
calendar.add(Calendar.HOUR_OF_DAY, 1);
} else if (null != scheduleParamBean.getMinute()) {
calendar.add(Calendar.MINUTE, 1);
} else if (null != scheduleParamBean.getSecond()) {
calendar.add(Calendar.SECOND, 1);
}
System.out.println("下次执行时间:" + calendar.getTime());
return calendar.getTime();
}

}
  • ScheduleParamBean.java
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/**
* 时间计划参数bean
*
* @author javacoo
* @since 2011-11-04
*/
public class ScheduleParamBean {
/** 每个月的第几周,每周的第几天,每个月的第几天,小时(24小时制),分钟,秒 */
private Integer weekOfMonth, dayOfWeek, dayOfMonth, hourOfDay, minute, second;

public ScheduleParamBean() {

}

public ScheduleParamBean(Integer weekOfMonth, Integer dayOfWeek, Integer dayOfMonth, Integer hourOfDay, Integer minute, Integer second) {
super();
this.weekOfMonth = weekOfMonth;
this.dayOfWeek = dayOfWeek;
this.dayOfMonth = dayOfMonth;
this.hourOfDay = hourOfDay;
this.minute = minute;
this.second = second;
}

public Integer getWeekOfMonth() {
return weekOfMonth;
}

public void setWeekOfMonth(Integer weekOfMonth) {
this.weekOfMonth = weekOfMonth;
}

public Integer getDayOfWeek() {
return dayOfWeek;
}

public void setDayOfWeek(Integer dayOfWeek) {
this.dayOfWeek = dayOfWeek;
}

public Integer getDayOfMonth() {
return dayOfMonth;
}

public void setDayOfMonth(Integer dayOfMonth) {
this.dayOfMonth = dayOfMonth;
}

public Integer getHourOfDay() {
return hourOfDay;
}

public void setHourOfDay(Integer hourOfDay) {
this.hourOfDay = hourOfDay;
}

public Integer getMinute() {
return minute;
}

public void setMinute(Integer minute) {
this.minute = minute;
}

public Integer getSecond() {
return second;
}

public void setSecond(Integer second) {
this.second = second;
}

@Override
public String toString() {
return "ScheduleParamBean [dayOfMonth=" + dayOfMonth + ", dayOfWeek=" + dayOfWeek + ", hourOfDay=" + hourOfDay + ", minute=" + minute
+ ", second=" + second + ", weekOfMonth=" + weekOfMonth + "]";
}

}
  • TestSchedule.java
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/**
* 测试
*
* @author javacoo
* @since 2011-11-03
*/
public class TestSchedule {
private final Scheduler scheduler = new Scheduler();

private final ScheduleParamBean scheduleParamBean;

public TestSchedule(final ScheduleParamBean scheduleParamBean) {
this.scheduleParamBean = scheduleParamBean;
}

public void start() {
scheduler.schedule(new SchedulerTask() {
public void run() {
execute();
}

private void execute() {
System.out.println("任务执行");
}
}, new SimpleScheduleIterator(scheduleParamBean));
}

public static void main(String[] args) {

ScheduleParamBean scheduleParamBean = new ScheduleParamBean();
scheduleParamBean.setWeekOfMonth(1);
scheduleParamBean.setDayOfWeek(6);
scheduleParamBean.setDayOfMonth(4);
scheduleParamBean.setHourOfDay(16);
scheduleParamBean.setMinute(22);
scheduleParamBean.setSecond(0);
TestSchedule test = new TestSchedule(scheduleParamBean);
test.start();

}

}

以下是整合到JEECMS采集器多线程版的代码片段

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/** 
* 开始执行采集任务
*/
public boolean start(Integer id) {
CmsAcquisition acqu = cmsAcquisitionMng.findById(id);
if (acqu == null || acqu.getStatus() == CmsAcquisition.START) {
return false;
}
TaskSchedulerManage taskManage = new TaskSchedulerManage(this,acqu);
taskManage.start();
return true;
}


private class TaskSchedulerManage {
private final Scheduler scheduler = new Scheduler();
private final MultiThreadAcquisitionSvcImpl multiThreadAcquisitionSvc;
private final CmsAcquisition acqu;
public TaskSchedulerManage(MultiThreadAcquisitionSvcImpl multiThreadAcquisitionSvc,CmsAcquisition acqu) {
this.multiThreadAcquisitionSvc = multiThreadAcquisitionSvc;
this.acqu = acqu;
}
public void start() {
scheduler.schedule(new SchedulerTask() {
public void run() {
processer();
}
private void processer() {
System.out.println("============开始执行计划任务=================");
new Thread(new MainThreadProcesser(multiThreadAcquisitionSvc,acqu)).start();
}
}, new SimpleScheduleIterator(new ScheduleParamBean(1,6,4,17,24,30)));
}
}

注:关键是 ScheduleIterator实现类了,框架有多强大 完全取决于你的ScheduleIterator实现类了。

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