java 执行长事物,当线程在执行长时间任务的某个循环中时，如何中断该线程？...

I need to stop doing some big task by sending the interruption signal to the Thread. I am using most of the APIs from java.util.concurrent.*. My task is send to the Thread and is executed. This task comes from the client so I do not have any control over that code.

Task are something similar to:

public class Task1 extends Thread {

public void run() {

while(true){

if(Thread.interrupted()){

return;

}

for(int i=0; i

System.out.println("I am task 1 " + i);

}

}

}

};

I want to basically stop looping through the for-loop when it receives the interruption signal (Please note that I cannot put the Thread.interrputed() logic inside for-loop as it comes from the client.) I have another class that use the Executor to execute this task.

public class ConcurrentTest {

public static void main(String[] args) {

// TODO Auto-generated method stub

ConcurrentTest test = new ConcurrentTest();

ExecutorService executorService = Executors.newFixedThreadPool(2);

Task1 task1 = new Task1();

Future> runningTask1 = executorService.submit(task1);

Task2 task2 = new Task2();

Future> runningTask2 = executorService.submit(task2);

//Stop First task after 5 second

try {

TimeUnit.SECONDS.sleep(5);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

runningTask1.cancel(Boolean.TRUE);

System.out.println("runningTask1.isDone is " + runningTask1.isDone());

System.out.println("runningTask1.isCancelled is " + runningTask1.isCancelled());

//Stop Second task after 10 second

try{

TimeUnit.SECONDS.sleep(3);

}catch(InterruptedException e){

e.printStackTrace();

}

runningTask2.cancel(Boolean.TRUE);

System.out.println("runningTask2.isDone is " + runningTask2.isDone());

System.out.println("runningTask2.isCancelled is " + runningTask2.isCancelled());

}

}

Task2 is :

public class Task2 extends Thread{

public void run() {

while(true){

if(Thread.interrupted()){

return;

}

System.out.println("I am task 2");

}

}

};

Task2 is interrpted however Task1 is never interrupted and continue executing inside for loop. I cannot put any logic inside client code (something similar to for-loop). I need help from SO community to resolve this issue. Thanks.

解决方案

The only bomb-proof solution is to run the client supplied code in an Isolate. An isolate is essentially a private virtual machine that a Java app can create, managed and communicate with. In particular, the parent app can safely kill an isolate and all its threads.

The problem is finding a JVM that supports Isolates.