Dobbo-HelloWorld
- 1. demo -- spring方式集成
- 1.1 实现步骤
- 2. demo -- springboot方式集成
- 2.1 实现provider
- 2.2 实现consumer
- 2.3 项目测试
1. demo – spring方式集成
dubbo官方文档
提供一个可被调用的接口
提供方:实现接口的方法逻辑,启动应用程序,接收消费方的调用
消费方:确认要调用的接口,找到注册中心,调用提供方,获取接口的返回结果
示例文档参考:https://github.com/apache/dubbo
1.1 实现步骤
- 启动zookeeper
- 引入相关依赖
<properties>
<dubbo.version>3.2.5</dubbo.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo</artifactId>
<version>${dubbo.version}</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
</dependency>
</dependencies>
- 声明接口及其实现类
声明GreetingsService 接口
public interface GreetingsService {
String sayHi(String name);
}
GreetingsService 具体实现类
import com.jyl.api.GreetingsService;
public class GreetingsServiceImpl implements GreetingsService {
public String sayHi(String name) {
return "hi, " + name;
}
}
- 创建提供方和消费方的应用程序
服务端Application
import com.jyl.api.GreetingsService;
import org.apache.dubbo.config.ApplicationConfig;
import org.apache.dubbo.config.RegistryConfig;
import org.apache.dubbo.config.ServiceConfig;
import java.util.concurrent.CountDownLatch;
public class Application {
// 先获取zookeeper部署的ip地址
private static String zookeeperHost = System.getProperty("zookeeper.address", "127.0.0.1");
public static void main(String[] args) throws Exception {
// 创建服务配置 服务对应的接口类GreetingsService 设置泛型
ServiceConfig<GreetingsService> service = new ServiceConfig<GreetingsService>();
// 设置应用程序的名称
service.setApplication(new ApplicationConfig("first-dubbo-provider"));
// 设置注册中心 指定zookeeper的连接地址
service.setRegistry(new RegistryConfig("zookeeper://" + zookeeperHost + ":2181"));
// 设置提供的接口
service.setInterface(GreetingsService.class);
// 设置提供具体的实现类
service.setRef(new GreetingsServiceImpl());
// 设置完成 执行导出命令
service.export();
System.out.println("dubbo service started");
// 保证线程一直挂起
new CountDownLatch(1).await();
}
}
客户端Application
import com.jyl.api.GreetingsService;
import org.apache.dubbo.config.ApplicationConfig;
import org.apache.dubbo.config.ReferenceConfig;
import org.apache.dubbo.config.RegistryConfig;
public class Application {
// 先获取zookeeper部署的ip地址
private static String zookeeperHost = System.getProperty("zookeeper.address", "127.0.0.1");
public static void main(String[] args) {
// 创建客户配置 服务对应的接口类GreetingsService 设置泛型
ReferenceConfig<GreetingsService> reference = new ReferenceConfig<GreetingsService>();
// 设置应用程序的名称
reference.setApplication(new ApplicationConfig("first-dubbo-consumer"));
// 设置注册中心 指定zookeeper的连接地址
reference.setRegistry(new RegistryConfig("zookeeper://" + zookeeperHost + ":2181"));
// 设置提供的接口
reference.setInterface(GreetingsService.class);
// 获取到远程的 接口调用
GreetingsService service = reference.get();
String message = service.sayHi("dubbo");
System.out.println(message);
}
}
- 启动服务端Application 和 客户端 Application
2. demo – springboot方式集成
示例文档参考地址:https://github.com/apache/dubbo-spring-boot-project/tree/master/dubbo-spring-boot-samples
2.1 实现provider
- 启动zookeeper
- 创建dubbo-demo-provider SpringBoot项目
- 引入依赖(dubbo-springboot、 dubbo-zookeeper、要使用的api的依赖)
<properties>
<dubbo.version>2.7.7</dubbo.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>${dubbo.version}</version>
</dependency>
<dependency>
<groupId>com.jyl</groupId>
<artifactId>dubbo-demo-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
- 实现provider, 实现接口逻辑,增加配置参数
// 说明这个类是作为dubbo的服务被调用的
@DubboService(version = "1.0.0")
public class DemoServiceImpl implements DemoService {
@Override
public String sayHello(String name) {
return "Hello," + name;
}
}
- application.properties配置文件
server.port=8090
# 配置dubbo涉及的相关参数
spring.application.name=dubbo-demo-provider
# 配置dubbo服务的扫描路径
dubbo.scan.base-packages=com.jyl.provider.service
# 协议名称
dubbo.protocol.name=dubbo
dubbo.protocol.port=23456
# dubbo注册中心地址
dubbo.registry.address=zookeeper://127.0.0.1:2181
2.2 实现consumer
-
创建dubbo-demo-consumer SpringBoot项目
-
引入依赖 和 dubbo-demo-provider项目依赖一致
-
实现consumer,注意配置类和主程序入口
@SpringBootApplication
public class DubboDemoConsumerApplication {
//对于调用端
@DubboReference(version = "1.0.0")
DemoService demoService;
public static void main(String[] args) {
SpringApplication.run(DubboDemoConsumerApplication.class,args);
}
@Bean
public ApplicationRunner runner(){
return args -> System.out.println(demoService.sayHello("dubbo-spring-boot xxx"));
}
}
- application.properties
# 设置端口 避免端口号占用
server.port=8899
spring.application.name=dubbo-demo-consumer
# dubbo注册中心地址
dubbo.registry.address=zookeeper://127.0.0.1:2181
2.3 项目测试
先启动demo-provider ,后启动 demo-consumer
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