How to use

isFinishedInternal

method

in

com.facebook.presto.operator.Driver

while (System.nanoTime() - start < maxRuntime && !isFinishedInternal());

public boolean isFinished()
{
  checkLockNotHeld("Can not check finished status while holding the driver lock");
  // if we can get the lock, attempt a clean shutdown; otherwise someone else will shutdown
  try (DriverLockResult lockResult = tryLockAndProcessPendingStateChanges(0, TimeUnit.MILLISECONDS)) {
    if (lockResult.wasAcquired()) {
      return isFinishedInternal();
    }
    else {
      // did not get the lock, so we can't check operators, or destroy
      return state.get() != State.ALIVE || driverContext.isDone();
    }
  }
}

public ListenableFuture<?> processFor(Duration duration)
{
  checkLockNotHeld("Can not process for a duration while holding the driver lock");
  requireNonNull(duration, "duration is null");
  long maxRuntime = duration.roundTo(TimeUnit.NANOSECONDS);
  try (DriverLockResult lockResult = tryLockAndProcessPendingStateChanges(100, TimeUnit.MILLISECONDS)) {
    if (lockResult.wasAcquired()) {
      driverContext.startProcessTimer();
      try {
        long start = System.nanoTime();
        do {
          ListenableFuture<?> future = processInternal();
          if (!future.isDone()) {
            return future;
          }
        }
        while (System.nanoTime() - start < maxRuntime && !isFinishedInternal());
      }
      finally {
        driverContext.recordProcessed();
      }
    }
  }
  return NOT_BLOCKED;
}