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Spring Cloud Alibaba基础教程：@SentinelResource注解使用详解
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‎4-Finchley/README.md

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- [Spring Cloud Alibaba基础教程：Sentinel使用Apollo存储规则](http://blog.didispace.com/spring-cloud-alibaba-sentinel-2-2/)
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- [Spring Cloud Alibaba基础教程：Sentinel Dashboard中修改规则同步到Apollo](http://blog.didispace.com/spring-cloud-alibaba-sentinel-2-3/)
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- [Spring Cloud Alibaba基础教程：Sentinel Dashboard中修改规则同步到Nacos](http://blog.didispace.com/spring-cloud-alibaba-sentinel-2-4/)
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- [Spring Cloud Alibaba基础教程：@SentinelResource注解使用详解](http://blog.didispace.com/spring-cloud-alibaba-sentinel-2-5/)
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##### Spring Cloud Stream专题补充
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‎4-Finchley/alibaba-sentinel-annotation/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.didispace</groupId>
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<artifactId>alibaba-sentinel-annotation</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<packaging>jar</packaging>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.0.5.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<version>1.18.2</version>
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<optional>true</optional>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-dependencies</artifactId>
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<version>Finchley.SR1</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-alibaba-dependencies</artifactId>
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<version>0.2.2.RELEASE</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎4-Finchley/alibaba-sentinel-annotation/src/main/java/com/didispace/alibaba/sentinel/TestApplication.java

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package com.didispace.alibaba.sentinel;
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import com.alibaba.csp.sentinel.annotation.aspectj.SentinelResourceAspect;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.context.annotation.Bean;
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@SpringBootApplication
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public class TestApplication {
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public static void main(String[] args) {
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SpringApplication.run(TestApplication.class, args);
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}
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@Bean
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public SentinelResourceAspect sentinelResourceAspect() {
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return new SentinelResourceAspect();
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}
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}

‎4-Finchley/alibaba-sentinel-annotation/src/main/java/com/didispace/alibaba/sentinel/service/TestService.java

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package com.didispace.alibaba.sentinel.service;
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import com.alibaba.csp.sentinel.annotation.SentinelResource;
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import com.alibaba.csp.sentinel.slots.block.BlockException;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Service;
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@Slf4j
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@Service
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public class TestService {
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// 限流与阻塞处理
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@SentinelResource(value = "doSomeThing", blockHandler = "exceptionHandler")
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public void doSomeThing(String str) {
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log.info(str);
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}
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public void exceptionHandler(String str, BlockException ex) {
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log.error("blockHandler：" + str, ex);
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}
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// 熔断与降级处理
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@SentinelResource(value = "doSomeThing2", fallback = "fallbackHandler")
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public void doSomeThing2(String str) {
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log.info(str);
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throw new RuntimeException("发生异常");
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}
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public void fallbackHandler(String str) {
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log.error("fallbackHandler：" + str);
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}
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}

‎4-Finchley/alibaba-sentinel-annotation/src/main/java/com/didispace/alibaba/sentinel/web/TestController.java

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package com.didispace.alibaba.sentinel.web;
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import com.didispace.alibaba.sentinel.service.TestService;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RestController;
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import java.util.Date;
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@Slf4j
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@RestController
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public class TestController {
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@Autowired
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private TestService testService;
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@GetMapping("/hello")
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public String hello() {
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testService.doSomeThing("hello " + new Date());
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return "didispace.com";
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}
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@GetMapping("/hello2")
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public String hello2() {
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testService.doSomeThing2("hello2 " + new Date());
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return "didispace.com";
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}
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}

‎4-Finchley/alibaba-sentinel-annotation/src/main/resources/application.properties

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spring.application.name=alibaba-sentinel-annotation
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server.port=8001
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# sentinel dashboard
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spring.cloud.sentinel.transport.dashboard=localhost:8080

‎4-Finchley/pom.xml

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<module>alibaba-sentinel-datasource-apollo</module> <!-- 使用Apollo存储规则 -->
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<module>alibaba-sentinel-dashboard-apollo</module> <!-- 使用Apollo存储规则的Dashboard -->
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<module>alibaba-sentinel-dashboard-nacos</module> <!-- 使用Nacos存储规则的Dashboard -->
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<module>alibaba-sentinel-annotation</module> <!-- @SentinelResource注解的使用 -->
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<!--spring cloud stream专题-->
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<module>stream-consumer-self</module> <!-- 消费自己的消息 -->

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