spring boot集成dubbo,Spring boot +Dubbo,简易的配置方式

刚作完一个基于motan的项目不久,便去看看dubbo的新特性了,dubbo自上年9月恢复更新到如今大概半年多,发现已经有和spring boot集成的配置了。我的喜欢的配置方式优先级通常都是资源文件>Bean>xml,因感受而言Bean的配置方式更适合让人了解源码,而资源文件则是最简便,看了下还好以前写dubbo的demo时没有写文章,由于我通常都比较喜欢写能够经过最简易的方式达到目的的demo文章,并且也不会也重复的文章,若是以前写了就只有经过Bean配置而没有application资源文件配置dubbo的文章了。java

       该文章主要参考自 dubbo官方Demo,dubbo的基本特性能够看用户指南,dubbo的概念能够看用户指南的第一章入门便可,我就不转述了,想要在dubbo基础上扩展的能够看开发指南。建议能够先尝试本身根据官方去搭一下,出问题了能够再对比一下本文章代码找出问题,成功了就能够省略代码部分阅览了。react

        如今能够经过添加dubbo-spring-boot-starter依赖实现dubbo与spring boot的整合,简化dubbo的配置,具体文档以下图:
web

文档所属项目是dubbo-spring-boot-parent,因为0.2.x版本还没正式release,因此该demo用的依旧是0.1.0的依赖,但还未发现与Spring boot 2.0的版本继承有问题。spring

        我的demo分了3个模块-consumer、provider、service,这3个模块的父模块则是dubbo-demo。service里存放服务接口和POJO(按正常划分POJO该新建一个entity模块存放,但demo随便了一下),provider存放DAO、service接口实现暴露service,consumer存放controller(controller从暴露服务的位置获取所需服务,如consule、zookeeper为分布式服务进行管理的注册中心,也能够是特定url)。dubbo-motan的maven依赖以下:
mybatis

dubbo-service-demo模块存服务接口与POJO:app

package per.dubbo.demo.postgres.service;
 
import per.dubbo.demo.postgres.model.Student;
import com.baomidou.mybatisplus.service.IService;
 
/**
 * @author Wilson
 * @since 2018-05-25
 */
public interface StudentService extends IService<Student> {
 
maven

 

dubbo-provider-demo存放服务、DAO与dubbo配置资源文件properties.yml(@Service需用dubbo的):分布式

StudentServiceImpl:ide

package per.dubbo.demo.postgres.service.impl;
 
import com.alibaba.dubbo.config.annotation.Service;
import com.baomidou.mybatisplus.service.impl.ServiceImpl;
import per.dubbo.demo.postgres.dao.StudentDAO;
import per.dubbo.demo.postgres.model.Student;
import per.dubbo.demo.postgres.service.StudentService;
 
import javax.annotation.Resource;
 
/**
 * @author Wilson
 * @since 2018-05-25
 */
@Service
public class StudentServiceImpl extends ServiceImpl<StudentDAO, Student> implements StudentService {
    @Resource
    private StudentDAO studentDAO;
 
}spring-boot

dubbo-provider-demo模块下的application.xml: 

server:
  port: 8081
spring:
  application:
    name: provider-demo
dubbo:
  scan:
    base-packages: per.dubbo.demo.postgres.service.impl
  application:
    name: dubbo-provider-demo
    id: dubbo-provider-demo
  protocol:
    id: dubbo
    name: dubbo
    port: 33333
  registry:
    address: multicast://224.5.6.7:1234
    check: false

启动进程ProviderApplicationDemo(@EnableDubbo同@DubboComponentScan与@EnableDubboConfig,虽然application.yml已配置了扫描包但实际启动却没有起效,大概是我使用的spring boot版本是2.0但dubbo-spring-boot是0.1.x的缘由,因此要加@EnableDubbo才能起效):
package per.dubbo.demo.postgres;
 
import com.alibaba.dubbo.config.spring.context.annotation.EnableDubbo;
import io.swagger.annotations.Api;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
/**
 * ProviderApplicationDemo
 *
 * @author Wilson
 * @date 18-4-12
 */
@Api("ProviderApplicationDemo")
@EnableDubbo
@SpringBootApplication
public class ProviderApplicationDemo {
 
    public static void main(String[] args) {
        SpringApplication.run(ProviderApplicationDemo.class);
    }
}

dubbo-consumer-demo存放controller:


package per.dubbo.demo.controller.impl;
 
import com.alibaba.dubbo.config.annotation.Reference;
import org.springframework.web.bind.annotation.RestController;
import per.dubbo.demo.common.ServerResponse;
import per.dubbo.demo.controller.UserBaseController;
import per.dubbo.demo.postgres.service.StudentService;
import reactor.core.publisher.Mono;
 
/**
 * UserBaseControllerImpl
 *
 * @author Wilson
 * @date 18-5-25
 */
@RestController
public class UserBaseControllerImpl implements UserBaseController {
    @Reference
    private StudentService studentService;
 
    @Override
    public Mono<ServerResponse> login(String username, String password) {
        return Mono.just(ServerResponse.ok());
    }
 
    @Override
    public Mono<ServerResponse> list() {
        return Mono.just(ServerResponse.ok(studentService.selectList(null)));
    }
}
 

启动程序ConsumerDemoApplication(@PostConstruct在这只是用来判断有没有成功发现服务): 

package per.dubbo.demo;
 
import com.alibaba.dubbo.config.annotation.Reference;
import com.alibaba.dubbo.config.spring.context.annotation.DubboComponentScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import per.dubbo.demo.postgres.service.StudentService;
 
import javax.annotation.PostConstruct;
 
/**
 * ConsumerDemoApplication
 *
 * @author Wilson
 * @date 18-5-15
 */
@SpringBootApplication
@DubboComponentScan
public class ConsumerDemoApplication {
    @Reference
    private StudentService studentService;
 
    @PostConstruct
    public void init() {
        System.err.println("studentService:" + studentService);
    }
 
    public static void main(String[] args) {
        SpringApplication.run(ConsumerDemoApplication.class);
    }
}
 

consumer配置文件application.yml:

spring:
  application:
    name: dubbo-consumer-demo
server:
  port: 7979
dubbo:
  consumer:
        check: false
  application:
    id: dubbo-consumer
    name: dubbo-consumer
  protocol:
    id: consumer
    name: consumer
    port: 33333
  registry:
      address: multicast://224.5.6.7:1234
      check: false
  scan:
    base-packages: per.dubbo.demo.controller
 

项目起跑时均可以看到控制台输出application.yml的dubbo配置信息,以下图:

 这一切都部署好后就把每个Consumer模块都看成一个系统开发就行了,其它无关dubbo配置的代码就不贴浪费位置了,毕竟最重要的仍是思想。分布式就至关于把一个大系统划分为一个个小系统进行开发,而dubbo就是划分的代码实现。如电商就可分为用户Consumer、用户Provider、商品Consumer、商品Provider、订单Consumer、订单Provider等等,不一样的consumer能够放到一个consumer大模块进行管理,provider丢到一个provider大模块进行管理,按照该文章里的例子则dubbo-demo则为全部模块的祖宗,根据功能划分存放common、provider-demo、consumer-demo、service-demo、entity等子模块,consumer-demo里放user-consumer、order-consumer、store-consumer等子模块,provider-demo放user-provider、order-provider、store-provider等子模块