RPC远程调用

项目结构

示例1

直接调用服务提供方的接口实现类对象

接口

public interface DemoService {
    String sayHello(String name);
}

服务提供方

接口实现类

public class DemoServiceImpl implements DemoService {
    @Override
    public String sayHello(String name) {
        return "你好" + name;
    }
}

配置文件

<!--服务提供者名称-->
<dubbo:application name="provider"/>
<!--接口实现类对象-->
<bean id="demoService" class="com.cskaoyan.service.impl.DemoServiceImpl"/>
<!--定义服务-->
<dubbo:service interface="com.cskaoyan.api.DemoService" ref="demoService" registry="N/A"/>
<!--对外暴露的协议-->
<dubbo:protocol name="dubbo" port="20880"/>

主程序

public class Main {
    public static void main(String[] args) throws IOException {
        // 初始化Spring容器
        ApplicationContext app = new ClassPathXmlApplicationContext("applicationContext.xml");
        // DemoService demoService = (DemoService) app.getBean("demoService");
        // System.out.println(demoService.sayHello("中国"));
        // 阻塞
        System.in.read();
    }
}

调用者

主程序

public class Main {
    public static void main(String[] args) {
        // 获取Spring容器
        ApplicationContext app = new ClassPathXmlApplicationContext("applicationContext.xml");
        // 获取接口实现对象
        DemoService demoService = (DemoService) app.getBean("demoService");
        String res = demoService.sayHello("中国");
        System.out.println(res);
    }
}

配置文件

<!--调用者名称-->
<dubbo:application name="comsumer"/>
<!--服务接口-->
<dubbo:reference interface="com.cskaoyan.api.DemoService" id="demoService" url="dubbo://localhost:20880"/>

示例2

基于注册中心的RPC远程调用

只需要启动注册中心服务

服务提供方配置文件如下

<!--服务提供者名称-->
    <dubbo:application name="provider"/>
<!--接口实现类对象-->
<bean id="demoService" class="com.cskaoyan.service.impl.DemoServiceImpl"/>
<!--定义服务-->
<dubbo:service interface="com.cskaoyan.api.DemoService" ref="demoService"/>
<!--对外暴露的协议-->
<dubbo:protocol name="dubbo" port="20880"/>
<!--注册中心-->
<dubbo:registry address="zookeeper://localhost:2181" />

调用者提供方配置文件如下

<!--调用者名称-->
<dubbo:application name="comsumer"/>
<!--服务接口-->
<dubbo:reference interface="com.cskaoyan.api.DemoService" id="demoService"/>
<!--注册中心-->
<dubbo:registry address="zookeeper://localhost:2181" />

示例3

基于SpringBoot框架的RPC远程调用

接口

public interface DemoService {
    String sayHello(String name);
}

服务方

接口实现类

@Service
public class DemoServiceImpl implements DemoService {
    @Override
    public String sayHello(String name) {
        return "你好" + name;
    }
}

主程序

@SpringBootApplication
public class ProviderTest {
    public static void main(String[] args) {
        SpringApplication.run(ProviderTest.class, args);
    }
}

配置文件

dubbo:
  application:
    name: provider
  protocol:
    name: dubbo
    port: 20880
  scan:
    base-packages: com.cskaoyan.service.impl
  registry:
    address: zookeeper://localhost:2181

调用者

类

@Component
public class ConsumerService {
    @Reference(interfaceClass = DemoService.class)
    DemoService demoService;
    public String sayHello(String name){
        return demoService.sayHello(name);
    }
}

主程序

@SpringBootApplication
@ComponentScan(basePackages = "com.cskaoyan.service")
public class ConsumerTest {
    public static void main(String[] args) {
        // 获取Spring容器
        ApplicationContext app = SpringApplication.run(ConsumerTest.class, args);
        ConsumerService consumerService = (ConsumerService) app.getBean("consumerService");
        String res = consumerService.sayHello("中国");
        System.out.println(res);
    }
}

配置文件

dubbo:
  application:
    name: consumer
  registry:
    address: zookeeper://localhost:2181