sentinel熔断与限流-二、sentinel整合工程

新建cloudalibaba-sentinel-service8401微服务

引入依赖

<!--SpringCloud ailibaba nacos -->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!--SpringCloud ailibaba sentinel-datasource-nacos 后续做持久化用到-->
<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-datasource-nacos</artifactId>
</dependency>
<!--SpringCloud ailibaba sentinel -->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>

yml配置

server:
  port: 8401

spring:
  application:
    name: cloudalibaba-sentinel-service
  cloud:
    nacos:
      discovery:
        server-addr: 192.168.10.132:8848 #Nacos服务注册中心地址
    sentinel:
      transport:
        dashboard: 192.168.10.132:8081 #配置Sentinel dashboard地址
        port: 8719 #默认8719端口,加入被占用会自动从8719+1扫描,直到找到未被占用的端口


management:
  endpoints:
    web:
      exposure:
        include: '*'

feign:
  sentinel:
    enabled: true # 激活Sentinel对Feign的支持

主启动类添加@EnableDiscoveryClient

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;


@EnableDiscoveryClient
@SpringBootApplication
public class SentinelApp8401 {

    public static void main(String[] args) {
        SpringApplication.run(SentinelApp8401.class, args);
    }
}

业务类

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * 流空
 */
@RestController
@Slf4j
public class FlowLimitController {
    @GetMapping("/testA")
    public String testA() {
        return "------testA";
    }
    @GetMapping("/testB")
    public String testB() {
        log.info(Thread.currentThread().getName() + "\t" + "...testB");
        return "------testB";
    }
  }

测试

1.启动sentinel服务
2.启动 cloudalibaba-sentinel-service8401

访问 http://192.168.10.132:8081 查看服务

因为sentinel采用的是懒加载，所以需要执行一次访问即可
访问

http://localhost:8401/testA