perform method

@protected Future perform(Future<E> future, [ Object? key ])

perform an async operation

Implementation

@protected
Future perform(Future<E> future, [Object? key]) async {
  final Object asyncKey = key ?? _defaultKey;
  final int gen = _createGen(asyncKey);
  onAsyncStateChanged(FormeAsyncOperationState.processing, key);
  E result;
  try {
    result = await future;
  } catch (e, stackTrace) {
    if (_compareGen(gen, asyncKey)) {
      onError(e, stackTrace);
    }
    return;
  }
  if (_compareGen(gen, asyncKey)) {
    onAsyncStateChanged(FormeAsyncOperationState.success, key);
    onSuccess(result, key);
  }
}