OnJava8-Examples/onjava/TimedAbort.java

// onjava/TimedAbort.java
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Terminate a program after t seconds
package onjava;
import java.util.concurrent.*;

public class TimedAbort {
  private volatile boolean restart = true;
  public TimedAbort(double t, String msg) {
    CompletableFuture.runAsync(() -> {
      try {
        while(restart) {
          restart = false;
          TimeUnit.MILLISECONDS
            .sleep((int)(1000 * t));
        }
      } catch(InterruptedException e) {
        throw new RuntimeException(e);
      }
      System.out.println(msg);
      System.exit(0);
    });
  }
  public TimedAbort(double t) {
    this(t, "TimedAbort " + t);
  }
  public void restart() { restart = true; }
}