Spring Reactive WebClient Get Single Response Object

SpringWebClientGetOneExample.groovy

import groovy.transform.CompileStatic
import groovy.transform.ToString
import org.springframework.http.HttpMethod
import org.springframework.web.reactive.function.client.WebClient
import reactor.core.publisher.Mono

@CompileStatic
class TestMe {
  static void main(String[] args) {
    // Prepare webClient instance
    WebClient webClient = WebClient.builder().baseUrl('https://jsonplaceholder.typicode.com').build()
    // use retrieve - it's shortcut to response
    Mono<User> userMono = webClient.method(HttpMethod.GET).uri('/todos/{id}',1).retrieve().bodyToMono(User.class)
    // subscribe to userMono, and wait for result in blocking fashion. Returns user, null or an error
    User user = userMono.block()
    // prints output
    println user
  }
}

@ToString
class User {
  String userId
  String id
  String title
  String completed
}