Dubbo 在 spring xml 形式的配置要比SpringBoot 注解形式的配置 可读性要更友好。
springboot项目也推荐使用 xml 形式配置 dubbo
因为Dubbo 是可以具体到方法级别的,使用xml配置起来更直观。(官方也推荐)
本文就来使用 Dubbo 2.7 整合 Spring。
项目结构如下:
父类项目依赖 pom.xml
:
<properties>
<dubbo.version>2.7.13</dubbo.version>
<spring.version>4.3.16.RELEASE</spring.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-framework-bom</artifactId>
<version>${spring.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-bom</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
创建dubbo-samples-xml-api
项目,定义一个接口:
OrderService.java
public interface OrderService {
List<Order> getOrderInfo(long orderId);
}
Order.java:
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Order implements Serializable {
private static final long serialVersionUID = -3757842094691885448L;
Long orderId;
String orderName;
}
dubbo-provider.xml:
<context:component-scan base-package="com.dubbo.impl"/>
<dubbo:application name="dubbo-samples-provider-xml"/>
<dubbo:registry address="zookeeper://${zookeeper.address:127.0.0.1}:${zookeeper.port:2181}"/>
<dubbo:protocol name="dubbo" port="20883"/>
<dubbo:service interface="com.dubbo.api.OrderService" ref="orderServiceImpl" protocol="dubbo" group="one"/>
OrderServiceImpl.java ,实现接口:
@Service("orderServiceImpl")
@Slf4j
public class OrderServiceImpl implements OrderService {
@Override
public List<Order> getOrderInfo(long orderId) {
List<Order> list = new ArrayList<>();
Order order1 = new Order();
order1.setOrderId(199L);
order1.setOrderName("MacBook Pro 13");
Order order2 = new Order();
order2.setOrderId(200L);
order2.setOrderName("RTX 2060");
list.add(order1);
list.add(order2);
return list;
}
}
启动类Provider:
public class Provider {
public static void main(String[] args) throws Exception {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"spring/dubbo-provider.xml"});
context.start();
System.out.println("provider service start ......");
new CountDownLatch(1).await();
}
}
dubbo-consumer.xml:
<dubbo:application name="dubbo-samples-consumer-xml"/>
<dubbo:registry address="zookeeper://${zookeeper.address:127.0.0.1}:${zookeeper.port:2181}"/>
<dubbo:reference id="orderServiceImpl" check="false"
interface="com.dubbo.api.OrderService" protocol="dubbo" group="one"/>
实现类 OrderServiceImpl:
@Service("orderServiceImpl")
@Slf4j
public class OrderServiceImpl implements OrderService {
@Override
public List<Order> getOrderInfo(long orderId) {
log.info("OrderServiceImpl方法");
log.info("request from consumer: {}", RpcContext.getContext().getRemoteAddress());
log.info("protocol: {}",RpcContext.getContext().getProtocol());
log.info("response from provider: {}",RpcContext.getContext().getLocalAddress());
List<Order> list = new ArrayList<>();
Order order1 = new Order();
order1.setOrderId(199L);
order1.setOrderName("MacBook Pro 13");
Order order2 = new Order();
order2.setOrderId(200L);
order2.setOrderName("RTX 2060");
list.add(order1);
list.add(order2);
return list;
}
}
启动类Consumer:
/**
* @author 醋酸菌HaC | WebSite📶 : https://rain.baimuxym.cn
* @date 2021/11/22
* @Description consumer启动类,按下enter键
*/
public class Consumer {
public static void main(String[] args) throws Exception {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"spring/dubbo-consumer.xml"});
context.start();
System.out.println("consumer start.....");
// dubbo
OrderService orderService1 = context.getBean("orderServiceImpl", OrderService.class);
while (true) {
System.in.read();
RpcContext rpcContext = RpcContext.getContext();
System.out.println("SUCCESS: got order list " + orderService1.getOrderInfo(1L));
}
}
}
启动 provider,打开dubbo-admin(需要自行搭建,请参考:),可以看到provider已经注册进来了:
启动consumer,按下enter键。
consumer日志:
SUCCESS: got order list [Order(orderId=199, orderName=MacBook Pro 13), Order(orderId=200, orderName=RTX 2060)]
privider日志:
2021-12-23 11:42.35 [DubboServerHandler-172.16.44.48:20883-thread-2] -- [ INFO] - impl.OrderServiceImpl: OrderServiceImpl方法
2021-12-23 11:42.35 [DubboServerHandler-172.16.44.48:20883-thread-2] -- [ INFO] - impl.OrderServiceImpl: request from consumer: /172.16.44.48:47287
2021-12-23 11:42.35 [DubboServerHandler-172.16.44.48:20883-thread-2] -- [ INFO] - impl.OrderServiceImpl: protocol: null
2021-12-23 11:42.35 [DubboServerHandler-172.16.44.48:20883-thread-2] -- [ INFO] - impl.OrderServiceImpl: response from provider: 172.16.44.48:20883
Dubbo是支持多种协议的,以上我演示的是 dubbo(默认)协议。除了该协议,dubbo也支持其他协议,专栏其他文章我做了dubbo、hessian、rest协议的演示:
相对SpringBoot的yml、properties配置,xml的配置更清晰明了,个人也推荐使用xml的方式配置。