Hystrix

hystrix的作用是隔离远程访问远程系统、服务或者第三方库，防止级联失败，从而提高系统可用性、容错性与局部应用的弹性

使用方式

1.导入依赖

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

2.在启动类上添加注解@EnableHystrix

3.在需要进行熔断的方法上添加注解@HystrixCommand

    @HystrixCommand(fallbackMethod = "printDefaultMsg",
        threadPoolKey = "testThreadPool",
        threadPoolProperties = {
            @HystrixProperty(name = "coreSize", value = "30"),
            @HystrixProperty(name = "maxQueueSize", value = "10")
        }
    )
    @RequestMapping("/test1")
    public String test1(){
        String url = "http://eureka-application-service/test2";
        return restTemplate.getForObject(url, String.class);
    }