start method
Start the server.
Implementation
Future start() async {
if (isRunning) return;
_server = Server(
[
SystemService(_pMachineDir).service,
// SystemService(pMachineDir),
// ShellService(pMachineDir),
],
const <Interceptor>[],
CodecRegistry(codecs: const [GzipCodec(), IdentityCodec()]),
);
if (_port == 0) _port = await _getUnusedPort();
await _server!.serve(port: _port);
_isRunning = true;
}