Springboot 整合注解dubbo使用

　　之前学习了Netty 的源码，想着简单研究下dubbo基于netty封装的原理，然后了解netty在整个通信过程中的作用。

1. dubbo-service 工程封装的Service 接口和VO实体类

　　这个工程可以理解一个封装的common 工程，用于多个服务间共享。

1. pom 文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud</artifactId>
        <groupId>cn.qz.cloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>dubbo-service</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>

</project>

2. 几个重要的接口和VO类

GroupService

package cn.qz.dubbo.service;

import cn.qz.dubbo.vo.GroupVO;

import java.util.List;

public interface GroupService {

    void add(GroupVO groupVO);

    List<GroupVO> listAll();
}

UserService

package cn.qz.dubbo.service;

import cn.qz.dubbo.vo.UserVO;

import java.util.List;

public interface UserService {

    void addUser(UserVO userVO);

    List<UserVO> listUser();
} 

GroupVO

package cn.qz.dubbo.vo;

import lombok.Data;

@Data
public class GroupVO {

    private String name;

    private Integer userNum;
}

UserVO

package cn.qz.dubbo.vo;

import lombok.Data;

import java.io.Serializable;

@Data
public class UserVO implements Serializable {

    private String username;

    private String fullname;

    private Integer age;
}

2. dubbo-service-impl工程

　　这个可以理解为服务实现工程。主要是实现上面的接口，同时将服务发布到

1. pom文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud</artifactId>
        <groupId>cn.qz.cloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>dubbo-service-impl</artifactId>
    <dependencies>
        <dependency>
            <groupId>cn.qz.cloud</groupId>
            <artifactId>dubbo-service</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.7.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.8.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.13</version>
            <type>pom</type>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.10</version>
        </dependency>
    </dependencies>

</project>

2. application.yml 配置文件

server:
  port: -1

spring:
  application:
    name: dubbp-service-impl
dubbo:
  application:
    name: dubbp-service-impl
  registry:
    protocol: zookeeper
    address: zookeeper://192.168.99.100:2181
  protocol:
    name: dubbo
    port: 20881
  scan:
    base-packages: cn.qz

logging:
  level:
    root: info

3. DubboImplApplication主启动类

package cn.qz.dubbo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DubboImplApplication {

    public static void main(String[] args) {
        SpringApplication.run(DubboImplApplication.class, args);
    }
}

4. 相关的impl 实现类

UserServiceImpl

package cn.qz.dubbo.impl;

import cn.qz.dubbo.service.UserService;
import cn.qz.dubbo.vo.UserVO;
import org.apache.dubbo.config.annotation.Service;

import java.util.ArrayList;
import java.util.List;

@Service(version = "1.0.0", interfaceClass = UserService.class)
public class UserServiceImpl implements UserService {

    @Override
    public void addUser(UserVO userVO) {
        try {
            Thread.sleep(5 * 10000);
        } catch (InterruptedException e) {
        }
        System.out.println(Thread.currentThread().getName() + "	cn.qz.dubbo.impl.UserServiceImpl.addUser " + userVO);
    }

    @Override
    public List<UserVO> listUser() {
        UserVO userVO = new UserVO();
        userVO.setUsername("testusername");
        userVO.setFullname("testfullname");
        userVO.setAge(25);
        List<UserVO> objects = new ArrayList<>();
        objects.add(userVO);
        return objects;
    }

}

GroupServiceImpl

package cn.qz.dubbo.impl;

import cn.qz.dubbo.service.GroupService;
import cn.qz.dubbo.vo.GroupVO;
import org.apache.dubbo.config.annotation.Service;

import java.util.ArrayList;
import java.util.List;

@Service(version = "1.0.0", interfaceClass = GroupService.class)
public class GroupServiceImpl implements GroupService {

    @Override
    public void add(GroupVO groupVO) {
        System.out.println("cn.qz.dubbo.impl.GroupServiceImpl.add " + groupVO);
    }

    @Override
    public List<GroupVO> listAll() {
        GroupVO userVO = new GroupVO();
        userVO.setName("testname");
        userVO.setUserNum(290);
        List<GroupVO> objects = new ArrayList<>();
        objects.add(userVO);
        return objects;
    }


}

3.  dubbo-service-consumer 服务的消费者

1. pom 配置文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud</artifactId>
        <groupId>cn.qz.cloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>dubbo-service-consumer</artifactId>
    <dependencies>
        <dependency>
            <groupId>cn.qz.cloud</groupId>
            <artifactId>dubbo-service</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.7.3</version>
        </dependency>

        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.8.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.13</version>
            <type>pom</type>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.10</version>
        </dependency>
    </dependencies>
</project>

2. yml 配置文件

server:
  port: 9090

spring:
  application:
    name: dubbp-service-consumer
dubbo:
  application:
    name: dubbp-service-consumer
  registry:
    protocol: zookeeper
    address: zookeeper://192.168.99.100:2181

3. 主要的类

DubboConsumerApplication主启动类

package cn.qlq.dubbo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DubboConsumerApplication {

    public static void main(String[] args) {
        SpringApplication.run(DubboConsumerApplication.class, args);
    }
}

GroupController

package cn.qlq.dubbo.controller;

import cn.qz.dubbo.service.GroupService;
import cn.qz.dubbo.vo.GroupVO;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class GroupController {

    @Reference(version = "1.0.0")
    private GroupService groupService;

    @GetMapping("/listGroup")
    public List<GroupVO> listGroup() {
        return groupService.listAll();
    }

    @GetMapping("/addGroup")
    public void addUser() {
        GroupVO groupVO = new GroupVO();
        groupVO.setName("testname");
        groupVO.setUserNum(290);
        groupService.add(groupVO);
    }
}

UserController

package cn.qlq.dubbo.controller;

import cn.qz.dubbo.service.UserService;
import cn.qz.dubbo.vo.UserVO;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class UserController {

    @Reference(version = "1.0.0")
    private UserService userService;

    @GetMapping("/listUser")
    public List<UserVO> listUser() {
        return userService.listUser();
    }

    @GetMapping("/addUser")
    public void addUser() {
        UserVO user = new UserVO();
        user.setUsername("addUsername");
        user.setFullname("addFullname");
        user.setAge(25);
        userService.addUser(user);
    }
}

4. 启动后测试

1. 启动zk

2. 启动服务实现类应用

3. 查看zk 节点上面注册的信息

 　　可以看到节点的信息包括服务的地址，bean的名称，接口的名称，接口的方法以及其他相关的信息

4. 再次启动一个impl 实例，修改启动端口和dubbo 端口(这个端口是建立netty server 用的端口)

yml 修改dubbo 协议的端口是20880

5. 再次查看zk节点，发现provider 提供者变为两个

 6. 启动消费者

7. 访问进行测试：

$ curl http://localhost:9090/listUser
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    64    0    64    0     0    842      0 --:--:-- --:--:-- --:--:--   864[{"username":"testusername","fullname":"testfullname","age":25}]

　　

　　至此简单实现了其使用。关于调用原理以及负载均衡算法等下一篇进行研究。