Adopt the send notification to avoid deadlock. (#637)

Signed-off-by: Yaohai Zheng <yaozheng@microsoft.com>

Author: yaohaizh

src/extension.ts

@@ -9,7 +9,7 @@ import { collectionJavaExtensions } from './plugin';
 import { prepareExecutable, awaitServerConnection } from './javaServerStarter';
 import * as requirements from './requirements';
 import { Commands } from './commands';
-import { StatusNotification, ClassFileContentsRequest, ProjectConfigurationUpdateRequest, MessageType, ActionableNotification, FeatureStatus, ActionableMessage, CompileWorkspaceRequest, CompileWorkspaceStatus, ProgressReportNotification, ExecuteClientCommandRequest } from './protocol';
+import { StatusNotification, ClassFileContentsRequest, ProjectConfigurationUpdateRequest, MessageType, ActionableNotification, FeatureStatus, ActionableMessage, CompileWorkspaceRequest, CompileWorkspaceStatus, ProgressReportNotification, ExecuteClientCommandRequest, SendNotificationRequest } from './protocol';
 
 let oldConfig;
 let lastStatus;
@@ -157,6 +157,11 @@ export function activate(context: ExtensionContext) {
 					languageClient.onRequest(ExecuteClientCommandRequest.type, (params) => {
 						return commands.executeCommand(params.command, ...params.arguments);
 					});
+
+					languageClient.onRequest(SendNotificationRequest.type, (params) => {
+						return commands.executeCommand(params.command, ...params.arguments);
+					});
+
 					commands.registerCommand(Commands.OPEN_OUTPUT, () => {
 						languageClient.outputChannel.show(ViewColumn.Three);
 					});

src/protocol.ts

@@ -98,4 +98,9 @@ export namespace CompileWorkspaceRequest {
 
 export namespace ExecuteClientCommandRequest {
     export const type = new RequestType<ExecuteCommandParams, any, void, void>('workspace/executeClientCommand');
+}
+
+
+export namespace SendNotificationRequest {
+    export const type = new RequestType<ExecuteCommandParams, any, void, void>('workspace/notify');
 }