SpringCloud2微服务Hystrix服务降级案例

一、相关依赖

 

    org.springframework.cloud
    spring-cloud-starter-netflix-hystrix

二、案例核心代码

1）、方式一：通过@HystrixCommand方法的方式给部分接口配置单独的线程池实现服务降级

对外FeigClient案例代码

@FeignClient(name = "app-kingseok-framework")
public interface FrameworkServiceFeign extends IUserService {

}

本地服务案例代码

@RestController
public class PatientServiceImpl extends BaseApiService implements IPatientService {

    /**
     * framework服务
     */
    @Autowired
    private FrameworkServiceFeign frameworkServiceFeign;



    /**
     * 处理了雪崩 服务降级执行
     *  HystrixCommand默认开启线程池隔离方式，服务降级，服务熔断
     * @return ResponseBase
     */
    @HystrixCommand(fallbackMethod = "patientToUserInfoHystrixFallback")
    @RequestMapping("/patientToUserInfoHystrix")
    public ResponseBase patientToUserInfoHystrix() {
        System.out.println("patientToUserInfoHystrix线程池名称："+Thread.currentThread().getName());
        return frameworkServiceFeign.getUserInfo();
    }
    public  ResponseBase patientToUserInfoHystrixFallback(){
        return setResultSuccess("返回一个友好的提示:服务降级！服务器忙，请稍后重试！");
    }

}

2）、方式二：通过类方式给整个对外服务配置独立线程池 

服务降级类

@Component
public class FrameworkServiceFallback extends BaseApiService implements FrameworkServiceFeign {

    @Override
    public ResponseBase getUserInfo() {
        return setResultError("服务器忙，走服务降级");
    }
}

对外FeigClient案例代码

@FeignClient(name = "app-kingseok-framework",fallback = FrameworkServiceFallback.class)
public interface FrameworkServiceFeign extends IUserService {
}

本地服务类

@RestController
public class PatientServiceImpl extends BaseApiService implements IPatientService {

    /**
     * framework服务
     */
    @Autowired
    private FrameworkServiceFeign frameworkServiceFeign;


    @RequestMapping("/patientToUserInfoHystrixDemo2")
    public ResponseBase patientToUserInfoHystrixDemo2() {
        System.out.println("patientToUserInfoHystrix线程池名称："+Thread.currentThread().getName());
        return frameworkServiceFeign.getUserInfo();
    }

}

 三、JMeter测试结果

1）、压测前

2）、压测后

编写压测脚本 

结果