Dubbo SpringBoot配置方法

* SpringBoot与dubbo整合的三种方式：
* 1）、导入dubbo-starter，在application.properties配置属性，使用@Service【暴露服务】使用@Reference【引用服务】
* 2）、保留dubbo xml配置文件;
*     导入dubbo-starter，使用@ImportResource导入dubbo的配置文件即可
* 3）、使用注解API的方式：
*     将每一个组件手动创建到容器中,让dubbo来扫描其他的组件

服务提供方

Service注解暴露服务

@Service
public class AnnotationServiceImpl implements AnnotationService {
    @Override
    public String sayHello(String name) {
        return "annotation: hello, " + name;
    }
}

增加应用共享配置

# dubbo-provider.properties
dubbo.application.name=annotation-provider
dubbo.registry.address=zookeeper://127.0.0.1:2181
dubbo.protocol.name=dubbo
dubbo.protocol.port=20880

指定Spring扫描路径

@Configuration
@EnableDubbo(scanBasePackages = "org.apache.dubbo.samples.simple.annotation.impl")
@PropertySource("classpath:/spring/dubbo-provider.properties")
static public class ProviderConfiguration {
       
}

服务消费方

Reference注解引用服务

@Component("annotationAction")
public class AnnotationAction {

    @Reference
    private AnnotationService annotationService;
    
    public String doSayHello(String name) {
        return annotationService.sayHello(name);
    }
}

增加应用共享配置

# dubbo-consumer.properties
dubbo.application.name=annotation-consumer
dubbo.registry.address=zookeeper://127.0.0.1:2181
dubbo.consumer.timeout=3000

指定Spring扫描路径

@Configuration
@EnableDubbo(scanBasePackages = "org.apache.dubbo.samples.simple.annotation.action")
@PropertySource("classpath:/spring/dubbo-consumer.properties")
@ComponentScan(value = {"org.apache.dubbo.samples.simple.annotation.action"})
static public class ConsumerConfiguration {

}

调用服务

public static void main(String[] args) throws Exception {
    AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ConsumerConfiguration.class);
    context.start();
    final AnnotationAction annotationAction = (AnnotationAction) context.getBean("annotationAction");
    String hello = annotationAction.doSayHello("world");
}