6.SpringCloud-Hystrix快速入门使用

服务消费者

1.添加依赖

<!--Spring Cloud 熔断器起步依赖-->
<dependency>
 <groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-starter-hystrix</artifactId>
 <version>1.4.4.RELEASE</version>
</dependency>

这个依赖会报错，看了其它的帖子
依赖改为

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            <version>2.2.2.RELEASE</version>
        </dependency>

2.在入口类添加注解

@EnableCircuitBreaker

@SpringBootApplication
@EnableEurekaClient//开启eureka客户端支持
@EnableHystrix//@EnableCircuitBreaker//注解开启断路器功能
public class Springcloud002ConsumerApplication {
    
    

    public static void main(String[] args) {
    
    
        SpringApplication.run(Springcloud002ConsumerApplication.class, args);
    }

}

3.在controller中加入注解@HystrixCommand

    @RequestMapping("/web/hystrix")
    @HystrixCommand(fallbackMethod = "error")//回调error方法
    public String hystrix(){
    
    
        return restTemplate.getForEntity("http://SPRINGCLOUD-001-PROVIDER/service/hello",String.class).getBody();

    }
    
    public String error(){
    
    
        return "error hystrix";
    }