Sentinel系列之（三）初始化演示工程

初始化演示工程

1. 构建cloudalibaba-sentinel-service8401

• 建Module【cloudalibaba-sentinel-service8401】

• 改POM

  <?xml version="1.0" encoding="UTF-8"?>
  <project xmlns="http://maven.apache.org/POM/4.0.0"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><artifactId>cloud2020</artifactId><groupId>com.atguigu.springcloud</groupId><version>1.0-SNAPSHOT</version></parent>
      <modelVersion>4.0.0</modelVersion>
  
      <artifactId>cloudalibaba-sentinel-service8401</artifactId>
      <dependencies>
          <dependency>
              <groupId>com.atguigu.springcloud</groupId>
              <artifactId>cloud-api-commons</artifactId>
              <version>${project.version}</version>
          </dependency>
  
          <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>
  
          <dependency>
              <groupId>org.springframework.cloud</groupId>
              <artifactId>spring-cloud-starter-openfeign</artifactId>
          </dependency>
  
          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter-web</artifactId>
          </dependency>
          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter-actuator</artifactId>
          </dependency>
  
          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-devtools</artifactId>
              <scope>runtime</scope>
              <optional>true</optional>
          </dependency>
          <dependency>
              <groupId>cn.hutool</groupId>
              <artifactId>hutool-all</artifactId>
              <version>4.6.3</version>
          </dependency>
          <dependency>
              <groupId>org.projectlombok</groupId>
              <artifactId>lombok</artifactId>
              <optional>true</optional>
          </dependency>
          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter-test</artifactId>
              <scope>test</scope>
          </dependency>
      </dependencies>
  </project>
  

• 写YML

  server:
    port: 8401
  
  spring:
    application:
      name: cloudalibaba-sentinel-service
    cloud:
      nacos:
        discovery:
          server-addr: 192.168.59.128:8848
      sentinel:
        transport:
          dashboard: 192.168.59.128:8080
          port: 8719  #默认8719，假如被占用了会自动从8719开始依次+1扫描。直至找到未被占用的端口
  
  management:
    endpoints:
      web:
        exposure:
          include: '*'
  

• 主启动

  package com.atguigu.springcloud.alibaba;
  
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
  
  @EnableDiscoveryClient
  @SpringBootApplication
  public class MainApp8401
  {
      public static void main(String[] args) {
          SpringApplication.run(MainApp8401.class, args);
      }
  }
  

• 业务类

  package com.atguigu.springcloud.alibaba.controller;
  
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RestController;
  
  @RestController
  public class FlowLimitController {
      @GetMapping("/testA")
      public String testA() {
          return "------testA";
      }
  
      @GetMapping("/testB")
      public String testB() {
  
          return "------testB";
      }
  }
  

2. 测试

启动Nacos8848单机版

启动Sentinel8080

启动cloudalibaba-sentinel-service8401

访问http://192.168.59.128:8080，登录后界面是空的

Sentinel采用的懒加载，接口调用后，才会进行监控

访问http://localhost:8401/testA或http://localhost:8401/testB

至此，Nacos+Sentinel+微服务演示工程构建完成。