@SpringBootApplication
@EnableFeignClients
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

@FeignClient("stores")
public interface StoreClient {
    @RequestMapping(method = RequestMethod.GET, value = "/stores")
    List<Store> getStores();

    @RequestMapping(method = RequestMethod.GET, value = "/stores")
    Page<Store> getStores(Pageable pageable);

    @RequestMapping(method = RequestMethod.POST, value = "/stores/{storeId}", consumes = "application/json")
    Store update(@PathVariable("storeId") Long storeId, Store store);

    @RequestMapping(method = RequestMethod.DELETE, value = "/stores/{storeId:\\d+}")
    void delete(@PathVariable Long storeId);
}

@FeignClient(name = "stores", configuration = FooConfiguration.class)
public interface StoreClient {
    //..
}

@FeignClient(name = "${feign.name}", url = "${feign.url}")
public interface StoreClient {
    //..
}

@Configuration
public class FooConfiguration {
    @Bean
    public Contract feignContract() {
        return new feign.Contract.Default();
    }

    @Bean
    public BasicAuthRequestInterceptor basicAuthRequestInterceptor() {
        return new BasicAuthRequestInterceptor("user", "password");
    }
}

feign:
    client:
        config:
            feignName:
                connectTimeout: 5000
                readTimeout: 5000
                loggerLevel: full
                errorDecoder: com.example.SimpleErrorDecoder
                retryer: com.example.SimpleRetryer
                defaultQueryParameters:
                    query: queryValue
                defaultRequestHeaders:
                    header: headerValue
                requestInterceptors:
                    - com.example.FooRequestInterceptor
                    - com.example.BarRequestInterceptor
                decode404: false
                encoder: com.example.SimpleEncoder
                decoder: com.example.SimpleDecoder
                contract: com.example.SimpleContract
                capabilities:
                    - com.example.FooCapability
                    - com.example.BarCapability
                queryMapEncoder: com.example.SimpleQueryMapEncoder
                metrics.enabled: false

feign:
    client:
        config:
            default:
                connectTimeout: 5000
                readTimeout: 5000
                loggerLevel: basic

@FeignClient(contextId = "fooClient", name = "stores", configuration = FooConfiguration.class)
public interface FooClient {
    //..
}

@FeignClient(contextId = "barClient", name = "stores", configuration = BarConfiguration.class)
public interface BarClient {
    //..
}

@Configuration
public class CustomConfiguration {
    @Bean
    public FeignClientConfigurer feignClientConfigurer() {
        return new FeignClientConfigurer() {
            @Override
            public boolean inheritParentConfiguration() {
                 return false;
            }
        };
    }
}

@Import(FeignClientsConfiguration.class)
class FooController {

    private FooClient fooClient;

    private FooClient adminClient;

    @Autowired
    public FooController(Client client, Encoder encoder, Decoder decoder, Contract contract, MicrometerCapability micrometerCapability) {
        this.fooClient = Feign.builder().client(client)
                .encoder(encoder)
                .decoder(decoder)
                .contract(contract)
                .addCapability(micrometerCapability)
                .requestInterceptor(new BasicAuthRequestInterceptor("user", "user"))
                .target(FooClient.class, "https://PROD-SVC");

        this.adminClient = Feign.builder().client(client)
                .encoder(encoder)
                .decoder(decoder)
                .contract(contract)
                .addCapability(micrometerCapability)
                .requestInterceptor(new BasicAuthRequestInterceptor("admin", "admin"))
                .target(FooClient.class, "https://PROD-SVC");
    }
}

@Configuration
public class FooConfiguration {
    @Bean
    @Scope("prototype")
    public Feign.Builder feignBuilder() {
        return Feign.builder();
    }
}

@Configuration
public class FooConfiguration {
    @Bean
    public CircuitBreakerNameResolver circuitBreakerNameResolver() {
        return (String feignClientName, Target<?> target, Method method) -> feignClientName + "_" + method.getName();
    }
}

@FeignClient(url = "http://localhost:8080")
public interface DemoClient {

    @GetMapping("demo")
    String getDemo();
}

feign:
  circuitbreaker:
    enabled: true
    alphanumeric-ids:
      enabled: true
resilience4j:
  circuitbreaker:
    instances:
      DemoClientgetDemo:
        minimumNumberOfCalls: 69
  timelimiter:
    instances:
      DemoClientgetDemo:
        timeoutDuration: 10s

@FeignClient(name = "test", url = "http://localhost:${server.port}/", fallback = Fallback.class)
protected interface TestClient {

    @RequestMapping(method = RequestMethod.GET, value = "/hello")
    Hello getHello();

    @RequestMapping(method = RequestMethod.GET, value = "/hellonotfound")
    String getException();

}

@Component
static class Fallback implements TestClient {

    @Override
    public Hello getHello() {
        throw new NoFallbackAvailableException("Boom!", new RuntimeException());
    }

    @Override
    public String getException() {
        return "Fixed response";
    }

}

@FeignClient(name = "testClientWithFactory", url = "http://localhost:${server.port}/",
            fallbackFactory = TestFallbackFactory.class)
protected interface TestClientWithFactory {

    @RequestMapping(method = RequestMethod.GET, value = "/hello")
    Hello getHello();

    @RequestMapping(method = RequestMethod.GET, value = "/hellonotfound")
    String getException();

}

@Component
static class TestFallbackFactory implements FallbackFactory<FallbackWithFactory> {

    @Override
    public FallbackWithFactory create(Throwable cause) {
        return new FallbackWithFactory();
    }

}

static class FallbackWithFactory implements TestClientWithFactory {

    @Override
    public Hello getHello() {
        throw new NoFallbackAvailableException("Boom!", new RuntimeException());
    }

    @Override
    public String getException() {
        return "Fixed response";
    }

}

@FeignClient(name = "hello", primary = false)
public interface HelloClient {
    // methods here
}

public interface UserService {

    @RequestMapping(method = RequestMethod.GET, value ="/users/{id}")
    User getUser(@PathVariable("id") long id);
}

@RestController
public class UserResource implements UserService {

}

package project.user;

@FeignClient("users")
public interface UserClient extends UserService {

}

feign.compression.request.enabled=true
feign.compression.response.enabled=true

feign.compression.request.enabled=true
feign.compression.request.mime-types=text/xml,application/xml,application/json
feign.compression.request.min-request-size=2048

logging.level.project.user.UserClient: DEBUG

@Configuration
public class FooConfiguration {
    @Bean
    Logger.Level feignLoggerLevel() {
        return Logger.Level.FULL;
    }
}

@Configuration
public class FooConfiguration {
    @Bean
    Capability customCapability() {
        return new CustomCapability();
    }
}

@Configuration
public class FooConfiguration {
    @Bean
    public MicrometerCapability micrometerCapability(MeterRegistry meterRegistry) {
        return new MicrometerCapability(meterRegistry);
    }
}

public interface DemoClient {

    @GetMapping("/demo/{filterParam}")
    @Cacheable(cacheNames = "demo-cache", key = "#keyParam")
    String demoEndpoint(String keyParam, @PathVariable String filterParam);
}

// Params.java
public class Params {
    private String param1;
    private String param2;

    // [Getters and setters omitted for brevity]
}

@FeignClient("demo")
public interface DemoTemplate {

    @GetMapping(path = "/demo")
    String demoEndpoint(@SpringQueryMap Params params);
}

@FeignClient("demo")
public interface DemoTemplate {

    @GetMapping(path = "/stores")
    CollectionModel<Store> getStores();
}

@GetMapping("/objects/links/{matrixVars}")
Map<String, List<String>> getObjects(@MatrixVariable Map<String, List<String>> matrixVars);

@FeignClient("demo")
public interface DemoTemplate {

    @GetMapping(path = "/stores")
    CollectionModel<Store> getStores();
}

@FeignClient(name = "demo")
protected interface DemoFeignClient {

    @CollectionFormat(feign.CollectionFormat.CSV)
    @GetMapping(path = "/test")
    ResponseEntity performRequest(String test);

}

feign.autoconfiguration.jackson.enabled=true

feign.client.refresh-enabled=true

feign.oauth2.enabled=true