简单几步使用最新版本的DUBBO构建你的微服务体系
NACOS注册中心
- 从github下载最新版本的nacos
- 上传至服务器并解压
- 单机启动
sh startup.sh -m standalone - nacos 控制台访问地址
http://192.168.136.129:8848/nacos,使用账号nacos/nacos登录并访问
项目框架
本次案例包含三个组件
- 公共接口层 dubbo-api
- 生产者 dubbo-provider
- 消费者 dubbo-consumer
代码目录如下：
父目录
父目录主要是定义公共组件依赖，版本号，pom文件如下
<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>
<packaging>pom</packaging>
<modules>
<module>dubbo-api</module>
<module>dubbo-provider</module>
<module>dubbo-consumer</module>
</modules>
<groupId>com.jianzh5</groupId>
<artifactId>dubbo-demo</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<java.version>1.8</java.version>
<netty-all.version>4.0.35.Final</netty-all.version>
<spring-boot.version>2.1.9.RELEASE</spring-boot.version>
<dubbo.version>2.7.3</dubbo.version>
<nacos-client.version>1.1.4</nacos-client.version>
</properties>
<dependencyManagement>
<dependencies>
<!--SpringBoot-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!-- Apache Dubbo -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-bom</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!-- Dubbo Registry Nacos -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-registry-nacos</artifactId>
<version>${dubbo.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba.nacos</groupId>
<artifactId>nacos-client</artifactId>
<version>${nacos-client.version}</version>
</dependency>
<!-- Dubbo Spring Boot Starter -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>${dubbo.version}</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo</artifactId>
<version>${dubbo.version}</version>
<exclusions>
<exclusion>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
</exclusion>
<exclusion>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
</exclusion>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
</exclusions>
</dependency>
<!--接口-->
<dependency>
<groupId>com.jianzh5</groupId>
<artifactId>dubbo-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot.version}</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>在pom文件中直接依赖接口，这样生产者和消费者都可以使用了
接口层dubbo-api定义
pom
<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">
<parent>
<artifactId>dubbo-demo</artifactId>
<groupId>com.jianzh5</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>com.jianzh5</groupId>
<artifactId>dubbo-api</artifactId>
<packaging>jar</packaging>
</project>- 定义真实的接口
/**
* @author jianzh5
* @date 2019/11/5 10:45
*/
public interface HelloService {
String sayHello();
}生产者dubbo-provider
pom
<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">
<parent>
<artifactId>dubbo-demo</artifactId>
<groupId>com.jianzh5</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>com.jianzh5</groupId>
<artifactId>dubbo-provider</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<!-- Dubbo -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo</artifactId>
</dependency>
<!-- Dubbo Registry Nacos -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-registry-nacos</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.nacos</groupId>
<artifactId>nacos-client</artifactId>
</dependency>
<dependency>
<groupId>com.jianzh5</groupId>
<artifactId>dubbo-api</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>- 配置文件
application.xml
dubbo.application.name = dubbo-provider
dubbo.registry.address = nacos://192.168.136.129:8848
dubbo.scan.base-packages=com.jianzh5.provider.service.impl
dubbo.protocol.port=20881
dubbo.protocol.name=dubbo- 接口实现
@Service
public class HelloServiceImpl implements HelloService {
public String sayHello() {
return "欢迎关注微信公众号：JAVA日知录";
}
}注意这里的@service引用的是org.apache.dubbo.config.annotation.Service,不要引用错了
- 启动类
@SpringBootApplication
@EnableDubbo
public class PrivoderBootstrap {
public static void main(String[] args) {
SpringApplication.run(PrivoderBootstrap.class, args);
}
}需要引入@EnableDubbo注解
消费者dubbo-consumer
pom
<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">
<parent>
<artifactId>dubbo-demo</artifactId>
<groupId>com.jianzh5</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>com.jianzh5</groupId>
<artifactId>dubbo-consumer</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Dubbo -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo</artifactId>
</dependency>
<!-- Dubbo Registry Nacos -->
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-registry-nacos</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.nacos</groupId>
<artifactId>nacos-client</artifactId>
</dependency>
<dependency>
<groupId>com.jianzh5</groupId>
<artifactId>dubbo-api</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>- 配置文件application.properties
spring.application.name=dubbo-consumer
dubbo.registry.address = nacos://192.168.136.129:8848
server.port=9090- 消费者
HelloController
/**
* @author jianzh5
* @date 2019/11/5 11:29
*/
@RestController
public class HelloController {
@Reference
private HelloService helloService;
@GetMapping("/sayHello")
public String sayHello(){
return helloService.sayHello();
}
}使用@Reference注解注入HelloService
- 接口启动类
@SpringBootApplication
public class ConsumerBootstrap {
public static void main(String[] args) {
SpringApplication.run(ConsumerBootstrap.class, args);
}
}项目启动
- 启动生产者 dubbo-provider
- 启动消费者 dubbo-consumer
- 查看nacos控制台，观察是否注册
- 访问浏览器
http://localhost:9090/sayHello查看接口返回
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