Question

我需要设立一个支离破碎的职能,只有30分钟,在30分钟后执行。但是,如果符合适当条件,它也应该能够在规定时间之前自行终止。我不想睡觉,因为它应该收集数据,因此没有睡觉。

增编

Answer 1

public void someFunctino() {
    // set the timeout    
    // this will stop this function in 30 minutes
    long in30Minutes = 30 * 60 * 1000;
    Timer timer = new Timer();
    timer.schedule( new TimerTask(){
          public void run() {
               if( conditionsAreMet() ) { 
                   System.exit(0);
                }
           }
     },  in30Minutes );

     // do the work... 
      .... work for n time, it would be stoped in 30 minutes at most
      ... code code code
}

Answer 2

用<代码>System. CurrenttimeMillis()计算起步时间,计算现在每次停下来的时间,然后再收集你想要收集的数据。另一种办法是将时间与数据收集分开,以便每个数据可以自行操作。

如果你能够告诉what你正在收集的数据和how?

Answer 3

与此类似:

long startTime = System.currentTimeMillis();
long maxDurationInMilliseconds = 30 * 60 * 1000;

while (System.currentTimeMillis() < startTime + maxDurationInMilliseconds) {
    // carry on running - 30 minutes hasn t elapsed yet

    if (someOtherConditionIsMet) {
        // stop running early
        break;
    }
}

Answer 4

现代<代码>java.util.con 当前将使用 rel=“nofollow”Executorservice。有若干次“<代码>invoke”方法需要时间。

这里的例子有:

public static void main(String args[]) throws Exception {
    ExecutorService executor = Executors.newSingleThreadExecutor();
    executor.invokeAll(Arrays.asList(new Task()), 30, TimeUnit.MINUTES);
    executor.shutdown();
}

www.un.org/spanish/ecosoc 参看:

public class Task implements Callable<String> {

    @Override
    public String call() {
        // Just a dummy long running task.
        BigInteger i = new BigInteger("0");
        for (long l = 0; l < Long.MAX_VALUE; l++) {
            i.multiply(new BigInteger(String.valueOf(l)));

            // You need to check this regularly..
            if (Thread.interrupted()) {
                System.out.println("Task interrupted!");
                break; // ..and stop the task whenever Thread is interrupted.
            }
        }
        return null; // Or whatever you d like to use as return value.
    }

}

See also:

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