Dubbo入门02

使用注解方式配置

服务端

1. 接口及实现类

/**
 * 注解方式接口
 */
public interface ProviderServiceAnnotation {
    String SayHelloAnnotation(String word);
}

import com.alibaba.dubbo.config.annotation.Service;

/**
 * 注解方式实现类
 */
@Service(timeout = 5000)
public class ProviderServiceImplAnnotation implements ProviderServiceAnnotation{

    public String SayHelloAnnotation(String word) {
        return "Hello "+word;
    }
}

2. 配置类，使用的zookeeper作为注册中心，需先启动zookeeper

/**
 * 注解方式配置
 */
@Configuration
@EnableDubbo(scanBasePackages = "com.dubbo.provider.service.annotation")
public class DubboConfiguration {

    @Bean // #1 服务提供者信息配置
    public ProviderConfig providerConfig() {
        ProviderConfig providerConfig = new ProviderConfig();
        providerConfig.setTimeout(1000);
        return providerConfig;
    }

    @Bean // #2 分布式应用信息配置
    public ApplicationConfig applicationConfig() {
        ApplicationConfig applicationConfig = new ApplicationConfig();
        applicationConfig.setName("dubbo-annotation-provider");
        return applicationConfig;
    }

    @Bean // #3 注册中心信息配置
    public RegistryConfig registryConfig() {
        RegistryConfig registryConfig = new RegistryConfig();
        registryConfig.setProtocol("zookeeper");
        registryConfig.setAddress("localhost");
        registryConfig.setPort(2181);
        return registryConfig;
    }

    @Bean // #4 使用协议配置，这里使用 dubbo
    public ProtocolConfig protocolConfig() {
        ProtocolConfig protocolConfig = new ProtocolConfig();
        protocolConfig.setName("dubbo");
        protocolConfig.setPort(20880);
        return protocolConfig;
    }
}

3. 启动类

public class ProviderAnnoApplication {
    public static void main(String[] args) throws IOException {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(DubboConfiguration.class);
        context.start();
        System.in.read();
    }
}

消费端

1. 引用服务

/**
 * 注解方式的service
 */
@Component("annotatedConsumer")
public class ConsumerAnnotationService {

    @Reference
    private ProviderServiceAnnotation providerServiceAnnotation;

    public String doSayHello(String name) {
        return providerServiceAnnotation.SayHelloAnnotation(name);
    }
}

2. 配置类

/**
 * 注解配置类
 */
@Configuration
@EnableDubbo(scanBasePackages = "com.dubbo.consumer.Annotation")
@ComponentScan(value = {"com.dubbo.consumer.Annotation"})
public class ConsumerConfiguration {
    @Bean // 应用配置
    public ApplicationConfig applicationConfig() {
        ApplicationConfig applicationConfig = new ApplicationConfig();
        applicationConfig.setName("dubbo-annotation-consumer");
        Map<String, String> stringStringMap = new HashMap<String, String>();
        stringStringMap.put("qos.enable","true");
        stringStringMap.put("qos.accept.foreign.ip","false");
        stringStringMap.put("qos.port","33333");
        applicationConfig.setParameters(stringStringMap);
        return applicationConfig;
    }

    @Bean // 服务消费者配置
    public ConsumerConfig consumerConfig() {
        ConsumerConfig consumerConfig = new ConsumerConfig();
        consumerConfig.setTimeout(3000);
        return consumerConfig;
    }

    @Bean // 配置注册中心
    public RegistryConfig registryConfig() {
        RegistryConfig registryConfig = new RegistryConfig();
        registryConfig.setProtocol("zookeeper");
        registryConfig.setAddress("localhost");
        registryConfig.setPort(2181);
        return registryConfig;
    }
}

3. 启动类

/**
 * 注解方式启动
 */
public class ConsumerAnnotationApplication {
    public static void main(String[] args) throws IOException {

        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ConsumerConfiguration.class);
        context.start(); // 启动
        ConsumerAnnotationService consumerAnnotationService = context.getBean(ConsumerAnnotationService.class);
        String hello = consumerAnnotationService.doSayHello("World!"); // 调用方法
        System.out.println(hello); // 输出结果

    }
}