public InProcLanguageServer( AbstractInProcLanguageClient languageClient, Stream inputStream, Stream outputStream, RequestDispatcher requestDispatcher, Workspace workspace, IDiagnosticService?diagnosticService, IAsynchronousOperationListenerProvider listenerProvider, ILspWorkspaceRegistrationService lspWorkspaceRegistrationService, string?clientName) { _languageClient = languageClient; _requestDispatcher = requestDispatcher; _workspace = workspace; var jsonMessageFormatter = new JsonMessageFormatter(); VSExtensionUtilities.AddVSExtensionConverters(jsonMessageFormatter.JsonSerializer); _jsonRpc = new JsonRpc(new HeaderDelimitedMessageHandler(outputStream, inputStream, jsonMessageFormatter)); _jsonRpc.AddLocalRpcTarget(this); _jsonRpc.StartListening(); _diagnosticService = diagnosticService; _listener = listenerProvider.GetListener(FeatureAttribute.LanguageServer); _clientName = clientName; _queue = new RequestExecutionQueue(lspWorkspaceRegistrationService, languageClient.Name, _languageClient.GetType().Name); _queue.RequestServerShutdown += RequestExecutionQueue_Errored; // Dedupe on DocumentId. If we hear about the same document multiple times, we only need to process that id once. _diagnosticsWorkQueue = new AsyncBatchingWorkQueue <DocumentId>( TimeSpan.FromMilliseconds(250), ProcessDiagnosticUpdatedBatchAsync, EqualityComparer <DocumentId> .Default, _listener, _queue.CancellationToken); if (_diagnosticService != null) { _diagnosticService.DiagnosticsUpdated += DiagnosticService_DiagnosticsUpdated; } }