SpringMVC @GetExchange Anotasyonu - OpenFeign Yerine Kullanılır

Giriş

Şu satırı dahil ederiz

import org.springframework.web.service.annotation.GetExchange;

Açıklaması şöyle

Why do you need Spring Reactive Web dependencies

When creating the project above, the dependency of Spring Reactive Web was introduced, and the WebClient type was used when creating the service object of the proxy. This is because HTTP Interface currently only has built-in implementation of WebClient, which belongs to the category of Reactive Web. Spring will launch a RestTemplate-based implementation in subsequent versions.

Örnek

Şöyle yaparız

interface UsersClient {
  @GetExchange("/users")
  User findByFirstName(@RequestParam("firstName") String firstName);
}

Örnek

Elimizde şöyle bir REST kodu olsun

public class User implements Serializable {
  ...
}

@GetMapping("/users")
public List<User> list() {
    return IntStream.rangeClosed(1, 10)
            .mapToObj(i -> new User(i, "User" + i))
            .collect(Collectors.toList());
}

Şöyle yaparız

public interface UserApiService {
   @GetExchange("/users")
   List<User> getUsers();
}

@Test
void getUsers() {
   WebClient client = WebClient.builder()
    .baseUrl("http://localhost:8080/")
    .build();

  HttpServiceProxyFactory factory = HttpServiceProxyFactory
    .builder(WebClientAdapter.forClient(client))
    .build();

   UserApiService service = factory.createClient(UserApiService.class);
   List<User> users = service.getUsers();
   for (User user : users) {
      System.out.println(user);
   }
}