春天雲hystrix fallbackfactory

Question

當我研究與hystrix春假雲虛假，有一個問題，即 如果我使用LOGGER.info（「**** {}」，cause.getMessage（）），後備不起作用，UserFeignClient＃findById（長）超時和回退失敗。但是，如果我刪除cause.getMessage（），回退是可以的。爲什麼？

public class UserFeignFallBackFactory implements FallbackFactory<UserFeignClient> { 

    private static final Logger LOGGER = LoggerFactory.getLogger(UserFeignFallBackFactory.class); 

    @Override 
    public UserFeignClient create(Throwable cause) { 
     LOGGER.info("call UserFeignClient error, error msg is : {}"); 
     return new UserFeignClientEx() { 
      @Override 
      public User findById(@PathVariable("id") Long id) { 
       return new User(-1L, null, null, (short) 20); 
      } 
     }; 
    } 
} 

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Answer 1

你可以嘗試這樣的

public class UserFeignFallBackFactory implements FallbackFactory<UserFeignClient> { 

private static final Logger LOGGER = LoggerFactory.getLogger(UserFeignFallBackFactory.class); 

@Override 
public UserFeignClient create(Throwable cause) { 

    return new UserFeignClientEx() { 
     @Override 
     public User findById(@PathVariable("id") Long id) { 
      LOGGER.info("call UserFeignClient error, error msg is : {}"); 
      return new User(-1L, null, null, (short) 20); 
     } 
    }; 
} 
}