sentinel在controller上限流

╰半夏微凉° 2022-01-22 00:35 209阅读 0赞

折腾了半天终于大功告成，现在把重要的地方记录下来，希望帮到有需要的开发者：

1.添加三个依赖

<dependencyManagement>  
        <dependencies>  
            <dependency>  
                <groupId>org.springframework.cloud</groupId>  
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>  
                <version>0.1.2.RELEASE</version>      
                <type>pom</type>  
                <scope>import</scope>  
            </dependency>  
        </dependencies>  
    </dependencyManagement>

<dependency>  
            <groupId>org.springframework.cloud</groupId>  
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>  
        </dependency>  
        <dependency>  
            <groupId>com.alibaba.csp</groupId>  
            <artifactId>sentinel-annotation-aspectj</artifactId>  
        </dependency>          
         <dependency>  
            <groupId>com.alibaba.csp</groupId>  
            <artifactId>sentinel-transport-simple-http</artifactId>  
        </dependency>

关于spring-cloud-alibaba-dependencies的版本一定要特别注意，springboot2.0以下建议用0.1.2.RELEASE等其他较低版本，否则启动会报错

2.增加一个configuration类

@Configuration  
public class AspectConfiguration \{  
      
    @Bean  
    public SentinelResourceAspect sentinelResourceAspect() \{  
       return new SentinelResourceAspect();  
    \}      
\}

3.在application.proerties增加配置

\#Sentinel 控制台地址  
spring.cloud.sentinel.transport.dashboard=localhost:9010  
\#取消Sentinel控制台懒加载  
spring.cloud.sentinel.eager=true  
spring.cloud.sentinel.transport.heartbeat-interval-ms=2000    //该值设置影响到sentinel-dashboard的配置什么时候被更新到客户端  
spring.cloud.sentinel.transport.client-ip=127.0.0.1

public String blockHandler(HttpServletRequest req,BlockException ex) \{  
        //可以记录日志，返回任何你想返回的东西  
        return "请放慢速度";  
    \}

@GetMapping("/device")  
    @SentinelResource(value="restApi-device",blockHandler="blockHandler")  
    public String getDevice(HttpServletRequest req)

4.运行sentinel-dashboard（[https://github.com/alibaba/Sentinel/releases][https_github.com_alibaba_Sentinel_releases]）

java -Dserver.port=8080 -Dcsp.sentinel.dashboard.server=localhost:8080 -Dproject.name=sentinel-dashboard -jar target/sentinel-dashboard.jar

运行效果图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pvaG4xMzM3_size_16_color_FFFFFF_t_70][]

参考文章：

1.[https://github.com/alibaba/Sentinel/tree/master/sentinel-dashboard][https_github.com_alibaba_Sentinel_tree_master_sentinel-dashboard]

2.[https://github.com/alibaba/Sentinel/wiki/%E6%8E%A7%E5%88%B6%E5%8F%B0\#3-%E5%AE%A2%E6%88%B7%E7%AB%AF%E6%8E%A5%E5%85%A5%E6%8E%A7%E5%88%B6%E5%8F%B0][https_github.com_alibaba_Sentinel_wiki_E6_8E_A7_E5_88_B6_E5_8F_B0_3-_E5_AE_A2_E6_88_B7_E7_AB_AF_E6_8E_A5_E5_85_A5_E6_8E_A7_E5_88_B6_E5_8F_B0]

[https_github.com_alibaba_Sentinel_releases]: https://github.com/alibaba/Sentinel/releases
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pvaG4xMzM3_size_16_color_FFFFFF_t_70]: /images/20220122/5d3d25c2614a4732b7789893a09d5262.png
[https_github.com_alibaba_Sentinel_tree_master_sentinel-dashboard]: https://github.com/alibaba/Sentinel/tree/master/sentinel-dashboard
[https_github.com_alibaba_Sentinel_wiki_E6_8E_A7_E5_88_B6_E5_8F_B0_3-_E5_AE_A2_E6_88_B7_E7_AB_AF_E6_8E_A5_E5_85_A5_E6_8E_A7_E5_88_B6_E5_8F_B0]: https://github.com/alibaba/Sentinel/wiki/%E6%8E%A7%E5%88%B6%E5%8F%B0#3-%E5%AE%A2%E6%88%B7%E7%AB%AF%E6%8E%A5%E5%85%A5%E6%8E%A7%E5%88%B6%E5%8F%B0