Spring Cloud Alibaba和Dubbo融合实现
服务提供者
创建一个名为 hello-dubbo-nacos-provider 的服务提供者项目
POM
<?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
<?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
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
<!-- 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
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
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
<!-- 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
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
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。
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