5分鐘搞定Dubbo應用接入華為雲微服務引擎CSE
Dubbo和CSE底層都使用了Spring的依賴注入和bean管理系統，是以使用Dubbo的服務遷移到華為雲微服務引擎CSE的工作量較小， 主要改動在依賴和配置方面。
本示例的完整代碼已放在GitHub上，其中目錄dubbo-demo是原始的Dubbo DEMO，目錄dubbo-demo-servicecomb是改造後的可直接運作于華為雲CSE的DEMO。
1、管理依賴：/dubbo-demo/pom.xml
在主項目pom裡的dependencyManagement中增加如下配置來管理CSE包依賴，子項目就不需要指定CSE版本号。
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.huawei.paas.cse</groupId>
<artifactId>cse-dependency</artifactId>
<version>2.3.9</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement> 注意，maven的settings需添加cse的mirror才能正常下載下傳到cse的相關依賴包：
<mirror>
<id>nexus-cse</id>
<mirrorOf>*</mirrorOf>
<name>cse nexus</name>
<url>http://maven.huaweicse.com/nexus/content/groups/public</url>
</mirror> 2、服務提供方：dubbo-demo-provider
2.1、替換依賴：/dubbo-demo-provider/pom.xml
将對Dubbo的依賴替換為對CSE的依賴pom.xml
Dubbo
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.7</version>
</dependency>
CSE
<dependency>
<groupId>com.huawei.paas.cse</groupId>
<artifactId>cse-solution-service-engine</artifactId>
</dependency>
2.2、通過添加标簽的方式釋出服務接口：DemoServiceImpl
Dubbo
public class DemoServiceImpl implements DemoService {
......
}
CSE
@RpcSchema(schemaId = "providerSchema")
public class DemoServiceImpl implements DemoService {
...... }
2.3、修改配置：/dubbo-demo-provider/src/main/resources
删除：/dubbo-demo-provider/src/main/resources/META-INF/spring/dubbo-demo-provider.xml
新增：/dubbo-demo-provider/src/main/resources/META-INF/spring/demo.bean.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:util="http://www.springframework.org/schema/util" xmlns:cse="http://www.huawei.com/schema/paas/cse/pojo"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="com.alibaba.dubbo.demo" />
</beans> 新增：/dubbo-demo-provider/src/main/resources/microservice.yaml
APPLICATION_ID: dubbo_servicecomb
service_description:
name: provider
version: 0.0.1
cse:
service:
registry:
address: https://cse.cn-north-1.myhuaweicloud.com:443
rest:
address: 0.0.0.0:8082
credentials:
accessKey: 替換為華為雲IAM賬号AK（如何擷取AK/SK）
secretKey: 替換為華為雲IAM賬号SK
akskCustomCipher: default
project: cn-north-1 2.4、修改提供方啟動入口
Dubbo
public class Provider {
public static void main(String[] args) throws Exception {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"META-INF/spring/dubbo-demo-provider.xml"});
context.start();
System.in.read(); // 按任意鍵退出
}
} CSE
public class Provider {
public static void main(String[] args) throws Exception {
Log4jUtils.init();
BeanUtils.init();
}
} 3、服務消費方：dubbo-demo-consumer
3.1、替換依賴：/dubbo-demo-consumer/pom.xml
将對Dubbo的依賴替換為對CSE的依賴
Dubbo
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.7</version>
</dependency>
CSE
<dependency>
<groupId>com.huawei.paas.cse</groupId>
<artifactId>cse-solution-service-engine</artifactId>
</dependency> 3.2、修改消費方啟動入口
Dubbo
public class Consumer {
public static void main(String[] args) {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"META-INF/spring/dubbo-demo-consumer.xml"});
context.start();
DemoService demoService = (DemoService) context.getBean("demoService");
String hello = demoService.sayHello("world");
System.out.println(hello);
}
} CSE
import org.springframework.stereotype.Component;
@Component
public class Consumer {
@RpcReference(microserviceName="provider", schemaId="providerSchema")
private static DemoService demoService;
public static void main(String[] args) throws Exception {
Log4jUtils.init();
BeanUtils.init();
String hello = demoService.sayHello("world");
System.out.println(hello);
}
}
3.3、修改配置：/dubbo-demo-comsumer/src/main/resources
删除：/dubbo-demo-consumer/src/main/resources/META-INF/spring/dubbo-demo-consumer.xml
新增：/dubbo-demo-consumer/src/main/resources/META-INF/spring/demo.bean.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:util="http://www.springframework.org/schema/util" xmlns:cse="http://www.huawei.com/schema/paas/cse/pojo"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="com.alibaba.dubbo.demo" />
</beans> 新增：/dubbo-demo-consumer/src/main/resources/microservice.yaml
APPLICATION_ID: dubbo_servicecomb
service_description:
name: consumer
version: 0.0.1
cse:
service:
registry:
address: https://cse.cn-north-1.myhuaweicloud.com:443
rest:
address: 0.0.0.0:8084
credentials:
accessKey: 替換為華為雲IAM賬号AK（如何擷取AK/SK）
secretKey: 替換為華為雲IAM賬号SK
akskCustomCipher: default
project: cn-north-1 4、驗證：先啟動Provider，再啟動Consumer
4.1、進入華為雲微服務引擎CSE控制台：微服務管理>服務治理>dubbo_servicecomb，看到如下服務調用關系：
4.2、進入Consumer的輸出控制台，能看到輸出：Hello world
