onError method

@override void onError(BlocBase bloc, Object error, StackTrace stackTrace)

Called whenever an error is thrown in any Bloc or Cubit. The stackTrace argument may be StackTrace.empty if an error was received without a stack trace.

Implementation

@override
void onError(BlocBase<dynamic> bloc, Object error, StackTrace stackTrace) {
  super.onError(bloc, error, stackTrace);
  assert(() {
    final context = CausalityZone.currentContext();
    TrinityEventBus.instance.emit(CausalEvent(
      parentId: context?.eventId,
      type: CausalEventType.crashEvent,
      description: '${bloc.runtimeType}: error',
      metadata: {
        'bloc_type': bloc.runtimeType.toString(),
        'error_type': error.runtimeType.toString(),
        'error_message': error.toString().substring(
              0,
              error.toString().length > 500 ? 500 : error.toString().length,
            ),
        'stack_top_3': stackTrace.toString().split('\n').take(3).join('\n'),
      },
    ));
    return true;
  }());
}