The example extension demonstrates how to communicate with backend services. It contains the following two backend service examples:
HelloBackendService: Can be called by the client to create a "Hello World" string. The client provides a name as a parameter, and the server returns the name prefixed with "Hello" (ex: "World" as a parameter returns "Hello World").HelloBackendWithClientService: Same asHelloBackendService, but the name parameter is not directly passed by the client in the first call. Instead, the backend services retrieves the name to say "Hello" to from the client again (BackendClient). This example shows how to implement call backs from the backend to the client. Further, the example contributes two commands to trigger both types of backend calls.
In the running application, trigger the command "Say hello on the backend" or "Say hello on the backend with a callback to the client" via the command palette (F1 => "Say Hello"). A message will be printed out on the console from where you launched the application.