springcloud alibaba系列整合springcloud alibabanacosdubbo1 引2 相关文章推荐3 环境准备3.1 nacos-server3.2 服务依赖3.3 服务说明3.4 micro-service-api3.5 micro-service-b依赖配置dubbo provider3.6 micro-service-b23.7 micro-service-a依赖配置web接口测试1 引Spring Cloud Alibaba 是由阿里巴巴开发的一套微服务一站式解决方案。它基于 Spring Cloud规范可以让你用简单的方式快速搭建起功能强大的分布式应用系统。它的诞生主要是为了给当时进入维护模式的 Spring Cloud Netflix 提供一个更强大、更全面的第二代实现方案。近期准备好好沉淀一下springcloud和springcloud alibaba相关的知识博客写了这么多年输出一直挺零散的基本都是记录的自己项目中遇到的一些坑或是备忘的总结或知识点。2 相关文章推荐涉及到的一些环境准备工作或者是系列前序知识就放到这里好了。开发环境搭建、开发工具安装示例集合docker容器初始化命令集合3 环境准备3.1 nacos-servernacos是springcloud alibaba推荐使用的注册中心和配置中心比eureka功能更强大且后者已经停止更新了。相关的安装文档可移步docker容器初始化命令集合快速安装一个做个人测试。3.2 服务依赖以下为根pom配置springcloud alibaba选用的是2023.0.1.0版本对应的jdk需要17以上springboot版本为3.3.2propertiesjava.version17/java.versionmaven.compiler.source17/maven.compiler.sourcemaven.compiler.target17/maven.compiler.targetproject.build.sourceEncodingUTF-8/project.build.sourceEncodingspring-cloud.version2023.0.3/spring-cloud.versionspring-cloud-alibaba.version2023.0.1.0/spring-cloud-alibaba.versionspring-cloud-alibaba-dubbo.version3.2.0/spring-cloud-alibaba-dubbo.versionspring-boot.version3.3.2/spring-boot.versionroswu.version1.0.1-SNAPSHOT/roswu.version/propertiesdependencyManagementdependenciesdependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-dependencies/artifactIdversion${spring-boot.version}/versiontypepom/typescopeimport/scope/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactIdversion${spring-boot.version}/version/dependency!-- 2. Spring Cloud --dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-dependencies/artifactIdversion${spring-cloud.version}/versiontypepom/typescopeimport/scope/dependency!-- 3. Spring Cloud Alibaba --dependencygroupIdcom.alibaba.cloud/groupIdartifactIdspring-cloud-alibaba-dependencies/artifactIdversion${spring-cloud-alibaba.version}/versiontypepom/typescopeimport/scope/dependencydependencygroupIdorg.apache.dubbo/groupIdartifactIddubbo-spring-boot-starter/artifactIdversion${spring-cloud-alibaba-dubbo.version}/version/dependencydependencygroupIdcn.com.roswu/groupIdartifactIdmicro-service-api/artifactIdversion${roswu.version}/version/dependency/dependencies/dependencyManagementdependenciesdependencygroupIdorg.projectlombok/groupIdartifactIdlombok/artifactId/dependency/dependenciesbuildpluginManagementpluginsplugingroupIdorg.springframework.boot/groupIdartifactIdspring-boot-maven-plugin/artifactIdversion${spring-boot.version}/version/plugin/plugins/pluginManagement/build3.3 服务说明本次只做简单的依赖处理和连通性测试设置四个module。micro-service-apiapi接口定义正常的多个不同领域的应用可以配备各自的api module供其它应用引入与调用micro-service-a接口层应用对外提供调用入口micro-service-b服务层应用提供dubbo service接口实现providermicro-service-b2同micro-service-b应用名一致本地做多实例测试用3.4 micro-service-api该module只定义接口pom文件不需要引入相关依赖继承一下根pom即可。定义一个interface接口publicinterfaceMicroBService{StringbServiceInvoke(Stringparam);}3.5 micro-service-b依赖首先是依赖需要引入nacos和dubbo还有springboot-web这些依赖还有micro-service-apidependenciesdependencygroupIdcom.alibaba.cloud/groupIdartifactIdspring-cloud-starter-alibaba-nacos-discovery/artifactId/dependencydependencygroupIdcom.alibaba.cloud/groupIdartifactIdspring-cloud-starter-alibaba-nacos-config/artifactId/dependencydependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-bootstrap/artifactId/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId/dependency!--自定义依赖--dependencygroupIdcn.com.roswu/groupIdartifactIdmicro-service-api/artifactId/dependencydependencygroupIdorg.apache.dubbo/groupIdartifactIddubbo-spring-boot-starter/artifactId/dependency/dependencies配置接着是配置文件这里配置了nacos和dubbo相关的信息其实这里的nacos配置可以省掉如果不用nacos配置文件的话因为dubbo配置的信息也会与nacos建立长连接后续通过dubbo协议做接口rpc调用时主要用的是这个连接实现的。server:port:8092spring:profiles:active:devapplication:name:micro-service-bcloud:nacos:config:import-check:enabled:falseserver-addr:localhost:8848namespace:publicfile-extension:yamlconfig:import:optional:nacos:micro-service-b-dev.yaml?groupDEFAULT_GROUPdubbo:application:name:micro-service-benable-file-cache:falseregistry:address:nacos://localhost:8848protocol:name:dubboport:18092scan:base-packages:cn.com.roswumanagement:endpoints:web:exposure:include:*dubbo provider然后的DubboService的实现类Slf4jServiceDubboServicepublicclassMicroBServiceImplimplementsMicroBService{OverridepublicStringbServiceInvoke(Stringparam){log.info(bServiceInvoke param:{},param);returnparam- bServiceInvoke;}}服务启动后可以在nacos的服务列表中看到micro-service-b和MicroBService生产者的注册信息。聪明的你很快注意到micro-service-b这里的实例数是2点开详情可以看到一个是服务注册的实例一个是dubbo注册的实例。3.6 micro-service-b2这个实例只需要修改一下服务端口和dubbo监听的端口即可其它内容和micro-service-b保持一样service实现里面的文案可以稍稍修改一下。server:port:8093spring:profiles:active:devapplication:name:micro-service-bcloud:nacos:config:import-check:enabled:falseserver-addr:localhost:8848namespace:publicfile-extension:yamlconfig:import:optional:nacos:micro-service-b-dev.yaml?groupDEFAULT_GROUPdubbo:application:name:micro-service-benable-file-cache:falseregistry:address:nacos://localhost:8848protocol:name:dubboport:18093scan:base-packages:cn.com.roswumanagement:endpoints:web:exposure:include:*3.7 micro-service-a依赖可与micro-service-b保持一致配置总体与micro-service-b保持一致增加了dubbo消费者负载均衡策略为roundrobin轮训check为false不添加此配置会检查服务接口的provider是否注册server:port:8091spring:profiles:active:devapplication:name:micro-service-acloud:nacos:config:import-check:enabled:falseserver-addr:localhost:8848namespace:publicfile-extension:yamlconfig:import:optional:nacos:micro-service-a-dev.yaml?groupDEFAULT_GROUPdubbo:consumer:check:falseloadbalance:roundrobin# provider:application:name:micro-service-aregistry:address:nacos://localhost:8848protocol:name:dubboport:18091scan:base-packages:cn.com.roswumanagement:endpoints:web:exposure:include:*web接口DubboReference注解这里也可以设置负载均衡方式而且优先级更高。org.springframework.web.bind.annotation.RestControllerorg.springframework.web.bind.annotation.RequestMapping(/web)publicclassRestController{DubboReference// DubboReference(loadbalance LoadbalanceRules.ROUND_ROBIN)privateMicroBServicemicroBService;GetMapping(hello)publicStringhello(RequestParam(valueparam,requiredfalse)Stringparam){returnmicroBService.bServiceInvoke(param);}}测试启动三个服务查看nacos服务列表浏览器直接访问http://localhost:8091/web/hello?param123查看micro-service-b和micro-service-b2控制台如果是轮训着输出结果即符合预期。