服务提供者
创建一个名为 hello-dubbo-nacos-provider 的服务提供者项目
POM
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<? xml version = "1.0" encoding = "UTF-8" ?> < project xmlns = "http://maven.apache.org/POM/4.0.0" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" > < modelVersion >4.0.0</ modelVersion > < parent > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-parent</ artifactId > < version >2.1.6.RELEASE</ version > < relativePath /> <!-- lookup parent from repository --> </ parent > < groupId >com.antoniopeng</ groupId > < artifactId >hello-dubbo-nacos-provider</ artifactId > < packaging >pom</ packaging > < modules > < module >hello-dubbo-nacos-provider-api</ module > < module >hello-dubbo-nacos-provider-service</ module > </ modules > </ project > |
该项目下有两个子模块,分别是 hello-dubbo-nacos-provider-api 和 hello-dubbo-nacos-provider-service,前者用于定义接口,后者用于实现接口。
服务提供者接口模块
在服务提供者项目下创建一个名为 hello-dubbo-nacos-provider-api 的模块, 该项目模块只负责 定义接口
POM
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<? xml version = "1.0" encoding = "UTF-8" ?> < project xmlns = "http://maven.apache.org/POM/4.0.0" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" > < modelVersion >4.0.0</ modelVersion > < parent > < groupId >com.antoniopeng</ groupId > < artifactId >hello-dubbo-nacos-provider</ artifactId > < version >0.0.1-SNAPSHOT</ version > </ parent > < artifactId >hello-dubbo-nacos-provider-api</ artifactId > < packaging >jar</ packaging > </ project > |
定义一个接口
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public interface EchoService { String echo(String string); } |
服务提供者接口实现模块
创建名为 hello-dubbo-nacos-provider-service 服务提供者接口的实现模块,用于实现在接口模块中定义的接口。
引入依赖
在 pom.xml 中主要添加以下依赖
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<!-- Nacos And Dubbo--> < dependency > < groupId >org.apache.dubbo</ groupId > < artifactId >dubbo-spring-boot-starter</ artifactId > </ dependency > < dependency > < groupId >org.apache.dubbo</ groupId > < artifactId >dubbo</ artifactId > </ dependency > < dependency > < groupId >org.apache.dubbo</ groupId > < artifactId >dubbo-serialization-kryo</ artifactId > </ dependency > < dependency > < groupId >com.alibaba</ groupId > < artifactId >dubbo-registry-nacos</ artifactId > </ dependency > < dependency > < groupId >com.alibaba.nacos</ groupId > < artifactId >nacos-client</ artifactId > </ dependency > < dependency > < groupId >com.alibaba.spring</ groupId > < artifactId >spring-context-support</ artifactId > </ dependency > <!-- 依赖接口模块,用于实现接口 --> < dependency > < groupId >com.antoniopeng</ groupId > < artifactId >hello-dubbo-nacos-provider-api</ artifactId > < version >${project.parent.version}</ version > </ dependency > |
相关配置
在 application.yml 中加入相关配置
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spring: application: name: dubbo-nacos-provider main: allow-bean-definition-overriding: true dubbo: scan: # 接口扫描路径 base-packages: com.antoniopeng.hello.dubbo.nacos.provider.service protocol: name: dubbo # -1 代表自动分配端口 port: -1 # 配置高速序列化规则 serialization: kryo registry: # 服务注册地址,也就是 Nacos 的服务器地址 address: nacos: //192 .168.127.132:8848 provider: # 配置负载均衡策略(轮询) loadbalance: roundrobin |
附:Duubo 负载均衡策略
- random:随机
- roundrobin:轮询
- leastactive:最少活跃数
- consistenthash:一致性 Hash
实现接口
通过 org.apache.dubbo.config.annotation 包下的 @Service 注解将接口暴露出去
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import com.antoniopeng.hello.dubbo.nacos.provider.api.EchoService; import org.apache.dubbo.config.annotation.Service; @Service (version = "1.0.0" ) public class EchoServiceImpl implements EchoService { @Override public String echo(String string) { return "Echo Hello Dubbo " + string; } } |
注意:@Service 注解要注明 version 属性
验证是否成功
启动项目,通过浏览器访问Nacos Server 网址 http://192.168.127.132:8848/nacos ,会发现有一个服务已经注册在服务列表中。
服务消费者
创建一个名为 hello-dubbo-nacos-consumer 的服务消费者项目
引入依赖
同样在 pom.xml中添加以下主要依赖
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<!-- Nacos And Dubbo --> < dependency > < groupId >org.apache.dubbo</ groupId > < artifactId >dubbo-spring-boot-starter</ artifactId > </ dependency > < dependency > < groupId >org.apache.dubbo</ groupId > < artifactId >dubbo-serialization-kryo</ artifactId > </ dependency > < dependency > < groupId >org.apache.dubbo</ groupId > < artifactId >dubbo-spring-boot-actuator</ artifactId > </ dependency > < dependency > < groupId >org.apache.dubbo</ groupId > < artifactId >dubbo</ artifactId > </ dependency > < dependency > < groupId >com.alibaba</ groupId > < artifactId >dubbo-registry-nacos</ artifactId > </ dependency > < dependency > < groupId >com.alibaba.nacos</ groupId > < artifactId >nacos-client</ artifactId > </ dependency > < dependency > < groupId >com.alibaba.spring</ groupId > < artifactId >spring-context-support</ artifactId > </ dependency > <!-- 依赖服务提供者接口模块,用于调用接口 --> < dependency > < groupId >com.antoniopeng</ groupId > < artifactId >hello-dubbo-nacos-provider-api</ artifactId > < version >${project.parent.version}</ version > </ dependency > |
相关配置
在 application.yml 中添加以下配置
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spring: application: name: dubbo-nacos-consumer main: allow-bean-definition-overriding: true dubbo: scan: # 配置 Controller 扫描路径 base-packages: com.antoniopeng.dubbo.nacos.consumer.controller protocol: name: dubbo port: -1 registry: address: nacos: //192 .168.127.132:8848 server: port: 8080 # 服务监控检查 endpoints: dubbo: enabled: true management: health: dubbo: status: defaults: memory extras: threadpool endpoints: web: exposure: include: "*" |
Controller
通过 org.apache.dubbo.config.annotation 包下的 @Reference 注解以 RPC 通信的方式调用服务,而对外提供以 HTTP 通信的方式的 Restful API
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import com.antoniopeng.dubbo.nacos.provider.api.EchoService; import org.apache.dubbo.config.annotation.Reference; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; @RestController public class EchoController { @Reference (version = "1.0.0" ) private EchoService echoService; @GetMapping (value = "/echo/{string}" ) public String echo( @PathVariable String string) { return echoService.echo(string); } } |
验证是否成功
通过浏览器访问 Nacos Server 网址 http:192.168.127.132:8848/nacos ,会发现又多了一个服务在服务列表中。
然后再访问服务消费者对外提供的 RESTful API http://localhost:8080/echo/hi,浏览器会响应以下内容:
Echo Hello Dubbo hi
到此,实现了 Nacos 与 Dubbo 的融合。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://www.cnblogs.com/antoniopeng/p/12687715.html