Abort from thread - Java Thread

Java examples for Thread:Thread Operation

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Description

Abort from thread

Demo Code

import java.util.ArrayList;

public class Main {
  public static void main(String[] args) {
    CountDownClock clock = new CountDownClock(20);

    ArrayList<Runnable> events = new ArrayList<Runnable>();
    events.add(new LaunchEvent(16, "A", clock));
    events.add(new LaunchEvent(6, "B", clock));
    events.add(new LaunchEvent(0, "C", clock));

    clock.start();//  w  ww .j  a  v  a 2s  .c  o  m

    for (Runnable e : events)
      new Thread(e).start();
  }
}

interface TimeMonitor {
  int getTime();

  void abortCountDown();
}

class CountDownClock extends Thread implements TimeMonitor {
  private int t;

  public CountDownClock(int start) {
    this.t = start;
  }

  public void run() {
    boolean aborted = false;
    for (; t >= 0; t--) {
      System.out.println("T minus " + t);
      try {
        Thread.sleep(1000);
      } catch (InterruptedException e) {
        aborted = true;
      }
      if (Thread.interrupted())
        aborted = true;
      if (aborted) {
        System.out.println("Stopping the clock!");
        break;
      }
    }
  }

  public int getTime() {
    return t;
  }

  public synchronized void abortCountDown() {
    Thread[] threads = new Thread[Thread.activeCount()];
    Thread.enumerate(threads);
    for (Thread t : threads)
      t.interrupt();
  }
}

class LaunchEvent implements Runnable {
  private int start;
  private String message;
  TimeMonitor tm;

  public LaunchEvent(int start, String message, TimeMonitor monitor) {
    this.start = start;
    this.message = message;
    this.tm = monitor;
  }

  public void run() {
    boolean eventDone = false;
    boolean aborted = false;
    while (!eventDone) {
      try {
        Thread.sleep(10);
      } catch (InterruptedException e) {
        aborted = true;
      }
      if (tm.getTime() <= start) {
        System.out.println(this.message);
        eventDone = true;
        if (true) {
          System.out.println("ABORT!!!!");
          tm.abortCountDown();
        }
      }
      if (Thread.interrupted())
        aborted = true;
      if (aborted) {
        System.out.println("Aborting " + message);
        break;
      }
    }
  }
}

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