SpringCloud Alibaba集成Dubbo实现远程服务间调用
工程创建
一、创建springBoot分模块项目,父工程:springcloud-alibaba以及子模块product-dubbo-provider、order-dubbo-consumer等
项目基本结构图如下所示:
二、依赖引入
在以上两个子模块的pom.xml文件中分别引入如下依赖:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-generator</artifactId>
</dependency>
<!--模板引擎依赖,即使不需要生成模板,也需要引入-->
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-engine-core</artifactId>
<version>2.2</version>
</dependency>
<!--mysql驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.github.xiaoymin</groupId>
<artifactId>knife4j-spring-boot-starter</artifactId>
</dependency>
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<!--Spring Cloud Alibaba-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
<version>0.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>com.alibaba.nacos</groupId>
<artifactId>nacos-client</artifactId>
</dependency>
<!--Dubbo-->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-dubbo</artifactId>
</dependency>
<!--对api的依赖-->
<dependency>
<groupId>com.springcloud.xxkfz</groupId>
<artifactId>dubbo-base</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
服务生产者
一、在编写生产者服务代码之前,我们首先在dubbo-base定义一个RPC接口queryList供消费者调用。那么这个接口在哪里去实现呢?
package com.simplememory.xxkfz.service;
import java.util.List;
/**
* @version 1.0.0
* @ClassName ConsumerImpl.java
* @Description TODO
* @createTime 2023年02月18日 20:41:00
*/
public interface IProviderService {
List<String> queryList();
}
二、在product-dubbo-provider模块中创建实现类ProviderServiceImpl.java实现dubbo-base声明的queryList接口。其中@Service
是Dubbo提供的注解,表示当前服务会发布成一个远程服务,不要和Spring提供的搞混哦。
package com.simplememory.xxkfz.service;
import org.apache.dubbo.config.annotation.Service;
import java.util.Arrays;
import java.util.List;
/**
* @version 1.0.0
* @ClassName ProviderServiceImpl.java
* @Description TODO
* @createTime 2023年02月18日 20:44:00
*/
@Service
public class ProviderServiceImpl implements IProviderService {
@Override
public List<String> queryList() {
return Arrays.asList
}
}
三、在配置文件application.yml中配置数据源信息、dubbo相关配置等;完整配置信息如下:
# 数据源配置
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/xk_cloud?characterEncoding=utf-8&allowMultiQueries=true&serverTimezone=GMT%2B8
username: root
password: root
application:
name: provider-service
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
server:
port: 8050
# dubbo相关配置
dubbo:
scan:
# dubbo服务实现类的扫描基准包路径
base-packages: com.simplememory.xxkfz.service
#Dubbo服务暴露的协议配置
protocol:
name: dubbo
port: 1
服务消费者
编写基本的相关代码结构
一、创建ConsumerController.java,提供查询列表数据的接口。
package com.simplememory.xxkfz.controller;
import com.simplememory.xxkfz.service.ConsumerService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
/**
* @version 1.0.0
* @ClassName ConsumerImpl.java
* @Description TODO
* @createTime 2023年02月18日 20:41:00
*/
@RestController
@RequestMapping("/dubbo/consumer")
public class ConsumerController {
@Autowired
private ConsumerService consumerService;
@GetMapping
public List<String> list() {
return consumerService.list();
}
}
二、创建ConsumerService.java
package com.simplememory.xxkfz.service;
import java.util.List;
/**
* @version 1.0.0
* @ClassName ConsumerService.java
* @Description TODO
* @createTime 2023年02月18日 20:41:00
*/
public interface ConsumerService {
List<String> list();
}
三、创建实现类ConsumerServiceImpl.java,并使用使用@Reference
注解注入相应的service,就可以像调用本地jar包一样,调用远程服务。
package com.simplememory.xxkfz.service.impl;
import com.simplememory.xxkfz.service.ConsumerService;
import com.simplememory.xxkfz.service.IProviderService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @version 1.0.0
* @ClassName ConsumerImpl.java
* @Description TODO
* @createTime 2023年02月18日 20:41:00
*/
@Service
public class ConsumerServiceImpl implements ConsumerService {
@Reference
private IProviderService providerService;
@Override
public List<String> list() {
return providerService.queryList();
}
}
四、在配置文件application.yml中配置基本信息,主要配置了要订阅的服务名;完整配置信息如下:
# 数据源配置
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/xk_cloud?characterEncoding=utf-8&allowMultiQueries=true&serverTimezone=GMT%2B8
username: root
password: root
application:
name: consumer-service
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
server:
port: 8020
#dubbo配置
#要订阅的服务名,多个用,隔开
dubbo:
cloud:
subscribed-services: provider-service
测试
- 启动nacos注册中心。
- nacos注册中心启动完成后,依次启动
DubboProviderMainApplication
,DubboConsumerMainApplication
生产者、消费者服务,可以看到Nacos服务列表里有两个服务。
- 在浏览器地址栏访问:http://127.0.0.1:8020/dubbo/consumer