Canonical Spring RestClient + JDK HttpClient configuration

RestClientConfig.java

@Configuration
public class RestClientConfig {
  @Bean
  public RestClient myRestClient(final RestClient.Builder restClientBuilder) {
    final var httpClient = HttpClient
      .newBuilder()
      .version(HttpClient.Version.HTTP_2)
      .executor(Executors.newVirtualThreadPerTaskExecutor())
      .build();

    final var jdkClientHttpRequestFactory = new JdkClientHttpRequestFactory(httpClient);
    // TODO: configure other settings here such as read timeout
    
    return restClientBuilder.requestFactory(jdkClientHttpRequestFactory).build();
  }
}