spring cloud alibaba - 集成sentinel

一、安装sentinel控制台

1、下载控制台jar

2、使用java命令运行

        java -jar sentinel-dashboard-1.8.4.jar --server.port=8808

二、导入pom

<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>

三、配置application.properties

    spring.cloud.sentinel.transport.dashboard=127.0.0.1:8808

四、使用sentinel

@RestController
public class HelloController {

    @DubboReference
    private HelloService helloService;

    /**
     * 可以在任何方法上使用
     */
    @SentinelResource(value = "hello", fallback = "fallback")
    @RequestMapping("/hello")
    public String sayHello() throws InterruptedException {
        Thread.sleep(800);
        helloService.sayHello();
        return "ok";
    }
    /**
     * 降级方法
     */
    public String fallback() {
        return "fail";
    }
}