Spring Cloude Fegin & Hystrix

Spring Cloude Fegin & Hystrix 사용법

• feign에서 hystrix 사용하기 (application.properties)

  feign.hystrix.enabled=true 
  

• feign에서 hystrix 사용하기 (어노테이션)

  @EnableCircuitBreaker 
  public class GatewayApplication {
    public static void main(String[] args) {
        SpringApplication.run(GatewayApplication.class, args);
    }
    이하 생략 
  }
  

• feigin Client 작성 예
  • fegin Client 예

    @FeignClient(value = "book-service", fallback=BooksClientFailback.class)
    public interface BooksClient {
    
        @RequestMapping(value = "/books/{bookId}", method = {RequestMethod.GET})
        Book getBookById(@PathVariable("bookId") Long bookId);
    }
    
    

  • Circuit Breaker

    @Component
    public class BooksClientFailback implements BooksClient {
    
        /**
         * Circuit Open
         */
        @Override
        public Book getBookById(Long bookId) {
            // TODO Auto-generated method stub
            System.out.println("Circuit Open !!! ");
            return new Book();
        }
    
    
    
    }