【springcloud】--Hystrix+ribbon搭建

一、说明二、代码实现

这里先介绍Eureka client、Hystrix、ribbon等组件架构关系，后续继续完善他们的功能原理。

需要的jar包

    org.springframework.cloud
    spring-cloud-starter



    org.springframework.cloud
    spring-cloud-starter-netflix-eureka-client



    org.springframework.cloud
    spring-cloud-starter-netflix-eureka-server
    2.1.0.RELEASE



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


    org.springframework.boot
    spring-boot-starter-actuator


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

加上注解

@EnableDiscoveryClient //注解注册到服务中心
@EnableEurekaClient
@EnableHystrix

Ribbon方式调用

@Configuration
public class RestTemplateConfiguration {
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }
}

服务消费者EurekaClient1—Ribbon+hystrix的方式

@Service
public class RibbonPersonService {

    @Autowired
    RestTemplate restTemplate;
    @HystrixCommand(fallbackMethod = "personByIdHytrix")
    public String getPersonById(Integer id){
       // http://localhost:7081/otherPerson/getPersonById.do?id=1
        String result = restTemplate.getForObject(
                "http://eurekaClient2/getPersonById.do?id="+id,String.class);
        return result;
    }
    //熔断的功能
    public String personByIdHytrix(Integer id){
        return "personById Hytrix";
    }
}

服务提供者EurekaClient2–controller层的接口【只要子类实现即可】

public interface OtherPersonApi {
    
    @RequestMapping(value = "/getPersonById.do",method = RequestMethod.GET)
    String getPersonById(@RequestParam(value = "id") Integer id);

    @RequestMapping(value = "/insertPerson.do",method = RequestMethod.GET)
    PersonPo insertPerson(@RequestParam(value = "userId") Integer userId,@RequestBody PersonPo person);
}