cancel method

@override void cancel()

Implementation

@override
void cancel() {
  if (_isCancellationRequested) {
    // Prevent to call listeners twice
    return;
  }
  _isCancellationRequested = true;

  if (_cancelListeners.isNotEmpty) {
    FCancellationException cancellationException;
    try {
      throw FCancellationException();
    } catch (e) {
      // Got stack trace in this way
      cancellationException = e as FCancellationException;
    }

    final errors = <FException>[];

    // Release callback. We do not need its anymore
    final cancelListeners =
        List<FCancellationTokenCallback>.from(_cancelListeners);
    for (final cancelListener in cancelListeners) {
      try {
        cancelListener(cancellationException);
      } catch (e) {
        errors.add(FException.wrapIfNeeded(e));
      }
    }

    FExceptionAggregate.throwIfNeeded(errors);
  }
}