SpringCloud Alibaba Sentinel实现熔断与限流

2021-02-16 12:19

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标签：工程超过 get group releases class rest 注册 lan

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官网：https://github.com/alibaba/Sentinel

中文：https://github.com/alibaba/Sentinel/wiki/%E4%BB%8B%E7%BB%8D

下载：https://github.com/alibaba/Sentinel/releases

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运行：

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1 初始化演示工程

1.1 大纲；

1.2 创建cloudalibaba-sentinel-service8401

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>cloud2020artifactId>
        groupId>com.eiletxie.springcloudgroupId>
        version>1.0-SNAPSHOTversion>
    parent>
    modelVersion>4.0.0modelVersion>

    artifactId>cloudalibaba-sentinel-service8401artifactId>

    dependencies>
        
        dependency>
            groupId>com.alibaba.cloudgroupId>
            artifactId>spring-cloud-starter-alibaba-nacos-discoveryartifactId>
        dependency>
        
        dependency>
            groupId>com.alibaba.cspgroupId>
            artifactId>sentinel-datasource-nacosartifactId>
        dependency>
        
        dependency>
            groupId>com.alibaba.cloudgroupId>
            artifactId>spring-cloud-starter-alibaba-sentinelartifactId>
        dependency>
        dependency>
            groupId>com.eiletxie.springcloudgroupId>
            artifactId>cloud-api-commonsartifactId>
            version>${project.version}version>
        dependency>
        dependency>
            groupId>org.springframework.cloudgroupId>
            artifactId>spring-cloud-starter-openfeignartifactId>
        dependency>
        dependency>
            groupId>org.springframework.bootgroupId>
            artifactId>spring-boot-starter-webartifactId>
        dependency>
        
        dependency>
            groupId>org.springframework.bootgroupId>
            artifactId>spring-boot-starter-actuatorartifactId>
        dependency>
        
        dependency>
            groupId>org.springframework.bootgroupId>
            artifactId>spring-boot-devtoolsartifactId>
            scope>runtimescope>
            optional>trueoptional>
        dependency>
        dependency>
            groupId>org.projectlombokgroupId>
            artifactId>lombokartifactId>
            optional>trueoptional>
        dependency>
        dependency>
            groupId>org.springframework.bootgroupId>
            artifactId>spring-boot-starter-testartifactId>
            scope>testscope>
        dependency>
    dependencies>
project>

yml:

server:
  port: 8401

spring:
  application:
    name: cloudalibaba-sentinal-service
  cloud:
    nacos:
      discovery:
        #Nacos服务注册中心地址
        server-addr: localhost:8848
    sentinel:
      transport:
        #配置Sentin dashboard地址
        dashboard: localhost:8080
        # 默认8719端口，假如被占用了会自动从8719端口+1进行扫描，直到找到未被占用的 端口
        port: 8719
management:
  endpoints:
    web:
      exposure:
        include: ‘*‘

localhost:8080 控制台的地址，指定控制台后客户端会自动向该地址发送心跳包

(默认8719) 客户端提供给Dashboard访问或者查看Sentinel的运行访问的参数

主启动类：

/**
 * @Author EiletXie
 * @Since 2020/3/17 12:52
 */
@EnableDiscoveryClient
@SpringBootApplication
public class MainApp8401 {

    public static void main(String[] args) {
        SpringApplication.run(MainApp8401.class,args);
    }
}

controller:

package com.eiletxie.springcloud.alibaba.controller;

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.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.concurrent.TimeUnit;

/**
 * @Author EiletXie
 * @Since 2020/3/17 12:54
 */
@RestController
@Slf4j
public class FlowLimitController {

    @GetMapping("/testA")
    public String testA() {
        return "----testA";
    }

    @GetMapping("/testB")
    public String testB() {
        return "----testB";
    }
}