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SpringCloud sentinel服务熔断服务降级

news 2025/7/25 16:56:47

在https://github.com/alibaba/Sentinel/releases下载最新版本sential jar包

打开cmd，输入java -jar xxx.jar 启动sentinel 服务端

通过观察cmd 日志输出sentinel基于springboot 2.5 开发

INFO: Sentinel log output type is: file
INFO: Sentinel log charset is: utf-8
INFO: Sentinel log base directory is: C:\Users\logs\csp\
INFO: Sentinel log name use pid is: false
INFO: Sentinel log level is: INFO.   ____          _            __ _ _/\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \\\/  ___)| |_)| | | | | || (_| |  ) ) ) )'  |____| .__|_| |_|_| |_\__, | / / / /=========|_|==============|___/=/_/_/_/:: Spring Boot ::               (v2.5.12)

打开

http://localhost:8080/ 用户名密码都是sentinel 打开控制台页面http://localhost:8080/#/dashboard/flow/demo1springboot项目引入依赖

spring-cloud-starter-alibaba-sentinel

坐标参考

<dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-sentinel</artifactId><version>2023.0.3.3</version>
</dependency>

properties增加配置：

spring.cloud.sentinel.transport.dashboard= localhost:8080
spring.cloud.sentinel.transport.port= 8719
feign.sentinel.enabled=true

在service 中@FeignClient增加项，fallbackFactory 指向TestfallbackFactory对象

@FeignClient(name = "demo1",fallbackFactory = TestFallbackFactory.class,configuration = FeignConfig.class)
public interface FeignService {@GetMapping(value = "test")User test();
}@Component
public class TestFallbackFactory implements FallbackFactory<FeignService> {@Overridepublic FeignService create(Throwable cause) {return new FeignService() {@Overridepublic User test() {System.out.println("fallback");return new User();}};}
}@Configuration
public class FeignConfig {@BeanLogger.Level feignLoggerLevel() {// 设置日志级别为FULL以获取最详细的日志信息return Logger.Level.FULL;}}

至此，客户端就配置好了

服务端打开http://localhost:8080/

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