springboot分布式整合dubbo的方式_java（springboot dubbo整合）
2022-03-01
Dubbo是Alibaba开源的分布式服务框架，它最大的特点是按照分层的方式来架构，使用这种方式可以使各个层之间解耦合（或者最大限度地松耦合）。从服务模型的角度来看，Dubbo采用的是一种非常简单的模型，要么是提供方提供服务，要么是消费方消费服务，所以基于这一点可以抽象出服务提供方（Provider）和服务消费方（Consumer）两个角色。
1.服务提供者配置
//需要额外引入的jar包 提供者
<dependency>
<groupId>com.alibaba.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>0.2.0</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
spring配置方式
<?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:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<dubbo:application name="user-service-provider"></dubbo:application>
<!-- 指定注册中心的地址,将来服务提供者要向注册中心进行注册-->
<dubbo:registry address="zookeeper://192.168.192.3:2181"></dubbo:registry>
<!-- 指定将来服务消费者消费我的时候使用的rpc协议 -->
<dubbo:protocol name="dubbo" port="11123"></dubbo:protocol>
<!-- 服务发布 -->
<bean id="userService" class="com.oracle.shop.user.service.impl.UserServiceImpl"></bean>
<dubbo:service interface="com.oracle.shop.user.service.UserService" ref="userService"></dubbo:service>
</beans>
springboot配置方式
#dubbo的配置 #服务名 dubbo.application.name=user-provider #注册中心地址 dubbo.registry.address=zookeeper://192.168.192.3:2181 #使用的协议以及端口号 dubbo.protocol.name=dubbo dubbo.protocol.port=11111
发布服务的方式
在相应的实现类上添加注解
import com.alibaba.dubbo.config.annotation.Service;
import com.oracle.shopping.user.mapper.MenuMapper;
import com.oracle.shopping.user.po.Menu;
import com.oracle.shopping.user.service.MenuService;
import javax.annotation.Resource;
@Service //dubbo的注解表示发布该类
@org.springframework.stereotype.Service//spring的注解表示会在启动时实例化该类
public class MenuServiceImpl implements MenuService {
@Resource
private MenuMapper menuMapper;
@Override
public int deleteByPrimaryKey(String id) {
return menuMapper.deleteByPrimaryKey(id);
}
@Override
public int insert(Menu record) {
return menuMapper.insert(record);
}
@Override
public int insertSelective(Menu record) {
return menuMapper.insertSelective(record);
}
@Override
public Menu selectByPrimaryKey(String id) {
return menuMapper.selectByPrimaryKey(id);
}
@Override
public int updateByPrimaryKeySelective(Menu record) {
return menuMapper.updateByPrimaryKeySelective(record);
}
@Override
public int updateByPrimaryKey(Menu record) {
return menuMapper.updateByPrimaryKey(record);
}
}
启动类中添加dubbo的扫包器，设置扫描路径
@SpringBootApplication
@MapperScan("com.oracle.shopping.user.mapper")
@EnableTransactionManagement
@DubboComponentScan("com.oracle.shopping.user.service.impl")
public class UserProviderApp {
public static void main(String[] args) {
SpringApplication.run(UserProviderApp.class, args);
}
}
2.服务消费者订阅
<dependency>
<groupId>com.alibaba.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>0.2.0</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
spring配置方式
<?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:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<dubbo:application name="user-web-consumer"></dubbo:application>
<!-- 指定注册中心的地址,将来服务提供者要向注册中心进行注册-->
<dubbo:registry address="zookeeper://192.168.192.3:2181"></dubbo:registry>
<!-- 订阅具体服务，让dubbo帮咱们生成动态代理客户端对象-->
<dubbo:reference interface="com.oracle.shop.user.service.UserService" id="userService"></dubbo:reference>
<dubbo:reference interface="com.oracle.shop.order.service.OrderService" id="orderService"></dubbo:reference>
</beans>
在controller中进行依赖注入和调用
@Controller
@RequestMapping("/user")
public class UserController {
//通过动态代理的方式生成的动态代理类
@Autowired(required = false)
private UserService userService;
//不进行检查，防止报错无法运行
@Autowired(required = false)
private OrderService orderService;
@RequestMapping("/a")
public @ResponseBody
User detail(){
return userService.findUserById(1);
}
@RequestMapping("/b")
public @ResponseBody
Orders details(){
return orderService.findUserById(1);
}
}
springboot配置方式
#指定自己的名称 dubbo.application.name=user-consumer #指定注册中心的地址 dubbo.registry.address=zookeeper://192.168.192.3:2181
在controller当中使用注解声明要使用的服务（实现类）
@RestController
@RequestMapping("/user")
public class UserController {
//表示要使用的服务
@Reference(interfaceName = "com.oracle.shopping.user.service.UserService")
private UserService userService;
@Autowired
private RedisTemplate redisTemplate;
@RequestMapping("/detail")
public User detail(String id){
return userService.selectByPrimaryKey(id);
}
}
启动类中设置dobbo注解的扫描路径
@SpringBootApplication
@DubboComponentScan("com.oracle.shopping.user.controller")
public class UserConsumerApp {
public static void main(String[] args) {
SpringApplication.run(UserConsumerApp.class );
}
}