sentinel集成nacos

        sentinel参数会随着业务变动，所以集成nacos非常有必要。

        首先要引入三个包

    <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-extension</artifactId>
        </dependency>
        <!-- 添加sentinel-datasource-nacos依赖 -->
        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
        </dependency>

        这里我也贴出我的依赖，供大家参考，但是一定要调研引入包是否有冲突。

        然后就要做一下几个步骤：

        第一步：bootstrap.xml里面配置参数

spring:
  cloud:
    sentinel:
      eager: true
      datasource:
        flow-rule:
          nacos:
         #   server-addr: nacos-dev.mstpay-inc.com:8848
            data-id:  mustangpay-promo-center-server-sentinel-flow-rules.json
            namespace: ${spring.profiles.active}
            group-id: DEFAULT_GROUP
            rule-type: flow
            data-type: json

注意sentinel里面依赖的nacos配置一定要写到nacos里面，不要写到代码里面

        1、要注意安全性

        2、修改起来麻烦

        mustangpay-promo-center-server-sentinel-flow-rules.json文件里面数据要配置成json

[
  {
    "resource": "aa",
    "limitApp": "default",
    "grade": 1,
    "count": 2,
    "strategy": 0,
    "controlBehavior": 0,
    "clusterMode": false
  },
  {
    "resource": "bb",
    "limitApp": "default",
    "grade": 1,
    "count": 2,
    "strategy": 0,
    "controlBehavior": 0,
    "clusterMode": false
  }
]

        代码里面要引入一个切面

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

        Controller里面要按照下面配置

 @PostMapping(value = UrlConstants.MUSTANG_PAY_MERCHANT_ADD_ONE_DRAFT)
    @SentinelResource(value = "aa", blockHandler = "handleException", blockHandlerClass = {OnboardingExceptionUtil.class})
    public ResponseResult<MerchantSubmitResp> aa(@Validated @RequestBody MerchantSubmitReq req) {
       
        return merchantSubmitRespResponseResult;
    }

        加一个异常返回类，做一个页面的展示兼容即可。

@Slf4j
public class OnboardingExceptionUtil {
    public static ResponseResult<tt> handleException(c req, BlockException ex) {
        return ResponseResult.error("Oops! Please try again later.");
    }

    public static ResponseResult<bb> handleException(b req, BlockException ex) {
        return ResponseResult.error("Oops! Please try again later.");
    }

    public static ResponseResult<cc> handleException(List<a> files, BlockException ex) {
        return ResponseResult.error("Oops! Please try again later.");
    }

}