code: public static void main(String[] args)  throws NoSuchAlgorithmException, InvalidKeyException {
          // The connection string value can be obtained by going to your App Configuration instance in the Azure portal
          // and navigating to "Access Keys" page under the "Settings" section.
          final String connectionString = "endpoint={endpoint_value};id={id_value};name={secret_value}";
          final HttpMethodRequestTracker tracker = new HttpMethodRequestTracker();
  
          // Instantiate a client that will be used to call the service.
          // We add in a policy to track the type of HTTP method calls we make.
          // We also want to see the Header information of our HTTP requests, so we specify the detail level.
          final ConfigurationAsyncClient client = ConfigurationAsyncClient.builder()
                  .credentials(new ConfigurationClientCredentials(connectionString))
                  .addPolicy(new HttpMethodRequestTrackingPolicy(tracker))
                  .httpLogDetailLevel(HttpLogDetailLevel.HEADERS)
                  .build();
  
          // Adding a couple of settings and then fetching all the settings in our repository.
          final List<ConfigurationSetting> settings = Flux.concat(client.addSetting(new ConfigurationSetting().key("hello").value("world")),
                  client.setSetting(new ConfigurationSetting().key("newSetting").value("newValue")))
                  .then(client.listSettings(new SettingSelector().key("*")).collectList())
                  .block();
  
          // Cleaning up after ourselves by deleting the values.
          final Stream<ConfigurationSetting> stream = settings == null
                  ? Stream.empty()
                  : settings.stream();
          Flux.merge(stream.map(client::deleteSetting).collect(Collectors.toList())).blockLast();
  
          // Check what sort of HTTP method calls we made.
          tracker.print();
      }
docs: Runs the sample algorithm and demonstrates how to add a custom policy to the HTTP pipeline.
  
  @param args Unused. Arguments to the program.
  @throws NoSuchAlgorithmException when credentials cannot be created because the service cannot resolve the
  HMAC-SHA256 algorithm.
  @throws InvalidKeyException when credentials cannot be created because the connection string is invalid.