dubbo 的基本使用

主要依赖

<dependency>
	<groupId>org.apache.dubbo</groupId>
	<artifactId>dubbo-dependencies-zookeeper</artifactId>
	<version>3.0.5</version>
	<type>pom</type>
</dependency>

<dependency>
	<groupId>org.apache.dubbo</groupId>
	<artifactId>dubbo</artifactId>
	<version>3.0.5</version>
</dependency>

<dependency>
	<groupId>org.apache.curator</groupId>
	<artifactId>curator-x-discovery</artifactId>
	<version>5.2.0</version>
</dependency>

provider(服务提供者)

自定义配置文件：dubbo.properties

dubbo.application.name=provider-test
# 注册中心
dubbo.registry.address=zookeeper://127.0.0.1:2181
# 使用协议
dubbo.protocol.name=dubbo
# 服务通信端口
dubbo.protocol.port=20881
dubbo.provider.token=true

服务接口
// 消费接口需要与提供者的接口全路径相同

public interface HelloService {
    String send();
}

@DubboService(version = "1.0.0")
public class HelloServiceImpl implements HelloService {
    @Override
    public String send() {
        String uuid = UUID.randomUUID().toString();
        return "dubbo-" + uuid;
    }
}

配置类

@Configuration
//服务接口实现所在包
@EnableDubbo(scanBasePackages = "com.example.api")
@PropertySource("classpath:/dubbo.properties")
public class DubboProviderConfig {
}

启动类

public class ProviderTest {

    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(DubboProviderConfig.class);
        context.start();

        while (true);
    }

}

consumer(服务消费者)
自定义配置文件：dubbo.properties

dubbo.application.name=consumer-test
dubbo.registry.address=zookeeper://127.0.0.1:2181
# 超时时间
dubbo.consumer.timeout=3000
# 重试次数
dubbo.consumer.retries=2
# 启动时没有提供者时不报错
dubbo.consumer.check=false
#关闭注册中心启动时检查
dubbo.registry.check=false

服务接口
// 消费接口需要与提供者的接口全路径相同

public interface HelloService {
    String send();
}

服务调用

@Service
public class RpcService {

	// 对于服务提供的version 
    @DubboReference(version = "1.0.0")
    private HelloService helloService;

    public void get(){
        String res = helloService.send();
        System.out.println(res);
    }
}

配置类

@Configuration
//开启基于注解的dubbo功能
@EnableDubbo(scanBasePackages = "com.example.api")
@PropertySource("classpath:/dubbo.properties")
// 扫描@DubboReference所在包
@ComponentScan(value = {"com.example.consumertest.service"})
public class DubboConsumerConfig {
}

启动类

public class ConsumerTest {

    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(DubboConsumerConfig.class);
        context.start();

        context.getBean(RpcService.class).get();
    }

}