Using Spring HTTP Interfaces for Internal Service Calls via Eureka Service Registry

How can Spring HTTP Interfaces be utilized to make internal service calls via a eureka service registry?

As of the Spring Cloud 2022.0.0 release, the Spring Cloud OpenFeign project is considered feature-complete. Future updates will focus on bug fixes and minor community contributions. Users are encouraged to migrate to Spring Interface Clients for continued development and support.

discover the services by service name from eureka service registry using Spring HTTP Interfaces to make internal services calls.

        import org.springframework.cloud.client.loadbalancer.reactive.LoadBalancedExchangeFilterFunction;
        import org.springframework.context.annotation.Bean;
        import org.springframework.context.annotation.Configuration;
        import org.springframework.web.bind.annotation.RequestBody;
        import org.springframework.web.reactive.function.client.WebClient;
        import org.springframework.web.reactive.function.client.support.WebClientAdapter;
        import org.springframework.web.service.annotation.HttpExchange;
        import org.springframework.web.service.annotation.PostExchange;
        import org.springframework.web.service.invoker.HttpServiceProxyFactory;
        import reactor.core.publisher.Mono;
        
        @Configuration
        public class HttpInterfacesConfig {
        
            @HttpExchange("/root")
            public interface SampleServiceClient {
        
                @PostExchange("/test")
                Mono<String> testEndpoint(@RequestBody Mono<String> logRequestMono);
            }
        
            @Bean
            public SampleServiceClient sampleServiceClient(LoadBalancedExchangeFilterFunction lbef, WebClient.Builder wcb) {
        
                WebClient webClient = wcb.baseUrl("http://your-service-name")// your service name here
                        .filter(lbef)
                        //.defaultHeaders(headers -> headers.add("Authorization", "Basic your-auth-token-here")) if you have security use this
                        .build();
                WebClientAdapter adapter =  WebClientAdapter.create(webClient);
                HttpServiceProxyFactory factory = HttpServiceProxyFactory.builderFor(adapter).build();
                return factory.createClient(SampleServiceClient.class);
            }
        }

use above HttpInterfacesConfig.SampleServiceClient to make call to other service

@Component
@RequiredArgsConstructor
public class Test {

        private final HttpInterfacesConfig.SampleServiceClient sampleServiceClient;
        
        Mono<String> callOtherService(Mono<String> logRequestMono) {
            
            return sampleServiceClient.testEndpoint(logRequestMono);
        }
}