How to use

processInternal

method

in

com.facebook.presto.operator.Driver

public ListenableFuture<?> process()
{
  checkLockNotHeld("Can not process while holding the driver lock");
  // if the driver is blocked we don't need to continue
  SettableFuture<?> blockedFuture = driverBlockedFuture.get();
  if (!blockedFuture.isDone()) {
    return blockedFuture;
  }
  Optional<ListenableFuture<?>> result = tryWithLock(100, TimeUnit.MILLISECONDS, () -> {
    ListenableFuture<?> future = processInternal(createTimer());
    return updateDriverBlockedFuture(future);
  });
  return result.orElse(NOT_BLOCKED);
}

long start = System.nanoTime();
do {
  ListenableFuture<?> future = processInternal(operationTimer);
  if (!future.isDone()) {
    return updateDriverBlockedFuture(future);

public ListenableFuture<?> process()
{
  checkLockNotHeld("Can not process while holding the driver lock");
  try (DriverLockResult lockResult = tryLockAndProcessPendingStateChanges(100, TimeUnit.MILLISECONDS)) {
    if (!lockResult.wasAcquired()) {
      // this is unlikely to happen unless the driver is being
      // destroyed and in that case the caller should notice notice
      // this state change by calling isFinished
      return NOT_BLOCKED;
    }
    return processInternal();
  }
}

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;
}