start method

@override Future<void> start()

Starts the engine.

This method is used to start the engine and perform any necessary initialization. It returns a Future that completes when the engine has started successfully. If any error occurs during the startup process, the Future will complete with an error.

Implementation

@override
Future<void> start() async {
  if (_stopCallback != null) return;
  if (_startingFuture != null) {
    return await _startingFuture;
  }

  final completer = Completer<void>();
  _startingFuture = completer.future;

  try {
    final (endpoint, stop) = await createServer();
    _endpoint = endpoint;
    _stopCallback = stop;
    completer.complete();
  } catch (e) {
    _stopCallback = null;
    completer.completeError(e);
  } finally {
    _startingFuture = null;
  }
}