@RestController
@RequestMapping("/task")
public class TaskController {
@Autowired
ThreadPoolTaskScheduler threadPoolTaskScheduler; //这是spring默认的 定时任务执行器 里面有个Executor 就是一个定时任务具体的执行器，是个AQS队列
@RequestMapping("/list")
public JSONArray getTaskList(HttpServletRequest request, HttpServletResponse response)throws Exception{
BlockingQueue<Runnable> queue =threadPoolTaskScheduler.getScheduledThreadPoolExecutor().getQueue();//获取AQS队列，里面有我们所有的定时任务
JSONArray tasklist=new JSONArray();
Iterator<Runnable> iterator = queue.iterator();//循环取出定时任务
while (iterator.hasNext()){
Runnable runnable = iterator.next();//虽然是个Runnable对象 ，但是通过反射，可以获取更多的内容。（这里多亏了idea 可以调试查看对象的class信息）
Field field = runnable.getClass().getSuperclass().getDeclaredField("callable");
field.setAccessible(true);
Object o1 = field.get(runnable);
Class<?> aClass = Class.forName("java.util.concurrent.Executors$RunnableAdapter");//这个RunnableAdapter 是个Executors的内部类，修饰符static final class。所以使用了forName的方法是获取class对象
Field taskField = aClass.getDeclaredField("task");
taskField.setAccessible(true);
Object o2 = taskField.get(o1);
Class o2Class = o2.getClass();
Field delegateField;
if (o2Class.equals( DelegatingErrorHandlingRunnable.class)){
delegateField= o2Class.getDeclaredField("delegate");
delegateField.setAccessible(true);
}else{
delegateField = o2Class.getSuperclass().getDeclaredField("delegate");
delegateField.setAccessible(true);
}
ScheduledMethodRunnable scheduledMethodRunnable=(ScheduledMethodRunnable)delegateField.get(o2);
Method method = scheduledMethodRunnable.getMethod();
JSONObject data=new JSONObject();
data.put("ScheduleClassName",method.getDeclaringClass().getName());
data.put("ScheduleMethodName",method.getName());
data.put("status",JSONObject.fromObject(runnable));
tasklist.add(data);
}
return tasklist;
}
}
idea yes eclipse no
