CODEWITHSUNDEEP
java
Datenshi
Datenshi

Reputation: 1191

Timeout for function

How can I make such thing possible in java ? Or to be more presice I would like to make timeout for my function.

Pseudo code:

public String aLotOfWork()
{
    return hardWork(); 

    if(hardWork() is still executing after 30 seconds)
           return "TimeOut";


}

I can use TimerTask for this but I cannot return any value from timer task run() to my upper function

TimerTask task = new TimerTask() {
    public void run() 
    {
        return ""; // timerTask run must be void.
    }
};
Timer timer = new Timer();
timer.schedule(task, 50000, 1);

Upvotes: 2

Views: 153

Answers (2)

Varun Achar
Varun Achar

Reputation: 15119

Checkout the FutureTask class. It provides a method called get(timeout, timeUnit). Off load the hardwork task to the FutureTask Class

public String aLotOfWork() {

  FutureTask task = new FutureTask<String>(new Callable<String>() {

    public String call() {
       return hardwork();
    }
  });

  try {
     return task.get(30, TimeUnit.SECONDS);
  } catch(TimeoutException e) {
     return "Timeout";
  }
  catch(Exception e) {
     return "Timeout"; // or whatever you like
  }

}

Upvotes: 4

Janak Dhanani
Janak Dhanani

Reputation: 214

void method() {
    long endTimeMillis = System.currentTimeMillis() + 10000;
    while (true) {
        // method logic
        if (System.currentTimeMillis() > endTimeMillis) {
            // do some clean-up
            return;
        }
    }
}

Upvotes: 0

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