dubbo 之 入门示例（springboot）

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dubbo入门示例很简单，服务端在数据库中查询user数据，消费端会调用服务端的服务获得用户数据。示例demo下载地址：https://download.csdn.net/download/zc_ad/10775010，项目的sql目录下有所需实验的sql文件。

代码目录解结构：

接口定义：在venue-dubbbo-api子项目下：

public interface UserService {

    Response queryUserByCode(String userCode);
}

venue-dubbbo-manager子项目：

服务端maven依赖：

<?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>venue-dubbo</artifactId>
        <groupId>com.xichuan.dubbo</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>venue-dubbbo-manager</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.xichuan.dubbo</groupId>
            <artifactId>venue-dubbbo-api</artifactId>
            <version>0.0.1-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-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.spring.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

服务端配置：

注意的配置是服务端端口，zookeeper服务的地址，以及协议、和提供服务所在的包

server:
  port: 2000

## Dubbo 服务提供者配置
spring:
  profiles:
      active: dev
  dubbo:
    application:
      name: manager
    server: true
    registry:
      id: xichuan
      address: zookeeper://127.0.0.1:2181
    protocol:
      name: dubbo
      port: 20881
    scan:
      base=packages: com.xichuan.dubbo.service



---
spring:
  profiles: dev
  master_key: ikldnm4e1rVZKfAV1JPC
  datasource:
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/xichuan?autoReconnect=true&useUnicode=true&characterEncoding=UTF-8&useSSL=false
    username: root
    password: root
    type: com.alibaba.druid.pool.DruidDataSource
    # 连接池的配置信息
    # 初始化大小，最小等待连接数量，最大等待连接数量，最大连接数
    initialSize: 1
    minIdle: 1
    maxActive: 20
    # 配置获取连接等待超时的时间
    maxWait: 60000
    # 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
    timeBetweenEvictionRunsMillis: 60000
    # 配置一个连接在池中最小生存的时间，单位是毫秒
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: true
    testOnReturn: false
    # 打开PSCache，并且指定每个连接上PSCache的大小
    poolPreparedStatements: false
    maxPoolPreparedStatementPerConnectionSize: 20
    # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
    filters: stat,wall,log4j
    # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
    # 合并多个DruidDataSource的监控数据
    #spring.datasource.useGlobalDataSourceStat=true

  jpa:
    database : MYSQL
    show-sql : true
    hibernate:
        ddl-auto: update
    properties:
        hibernate.format_sql: true
        hibernate.naming.physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
        hibernate.cache.use_second_level_cache: false
        hibernate.search.default.directory_provider: filesystem
        hibernate.search.default.indexBase: ./indexes
    open-in-view: true

druid:
  allow:
    ip: 127.0.0.1
  login:
    user_name: root
    password: root

在启动类上添加@EnableDubboConfiguration注解

@SpringBootApplication
@EnableDubboConfiguration
public class ManagerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ManagerApplication.class);
    }
}

提供服务的实现代码，只需要使用@Service注解即可，需要参数是版本号和接口类

import com.alibaba.dubbo.config.annotation.Service;
import com.xichuan.dubbo.common.response.ExtraResponse;
import com.xichuan.dubbo.common.response.Response;
import com.xichuan.dubbo.repository.UserRepository;
import com.xichuan.dubbo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 * Created by XiChuan on 2018-08-14.
 */
@Service(version = "1.0.0",interfaceClass = UserService.class)
@Component
public class UserServiceImpl implements UserService {

    @Autowired
    UserRepository userRepository;

    @Override
    public Response queryUserByCode(String userCode) {
        return new ExtraResponse(userRepository.queryByUserCodeAndStatus(userCode,1));
    }
}

venue-dubbbo-api子项目：

消费端maven依赖：

<?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>venue-dubbo</artifactId>
        <groupId>com.xichuan.dubbo</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>venue-dubbbo-consumer</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.xichuan.dubbo</groupId>
            <artifactId>venue-dubbbo-api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba.spring.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
        </dependency>

        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
        </dependency>

        <!--swagger2-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.7.0</version>
        </dependency>
        <!--springfox-swagger-ui       http://localhost:8010/swagger-ui.html-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.7.0</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

消费端配置文件，只需要太那几zookeeper地址即可。

server:
  port: 2001

## Dubbo 服务提供者配置
spring:
  profiles:
      active: dev
  dubbo:
    application:
          name: customer
    registry:
      id: xichuan
      address: zookeeper://127.0.0.1:2181

---
spring:
  profiles: dev
  master_key: ikldnm4e1rVZKfAV1JPC

swagger:
  enable: true
  info:
    version: 0.1
    title: 兮川的接口
    description: 对工作流操作的一系列接口
    user_name: XiChuan
    url:
    email:

消费端启动类中加上@EnableDubboConfiguration注解

@SpringBootApplication
@EnableDubboConfiguration
public class ConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConsumerApplication.class);
    }
}

使用服务端提供的服务获取数据,只需要使用@Reference注解，并加上版本号即可

import com.alibaba.dubbo.config.annotation.Reference;
import com.xichuan.dubbo.common.response.Response;
import com.xichuan.dubbo.service.UserService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by XiChuan on 2018-08-14.
 */
@RestController
@RequestMapping("/dubbo/test")
@Api(tags = "对dubbo进行测试")
public class UserController {


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

    @GetMapping("/{user_code}")
    @ApiOperation("通过user_code获得用户信息")
    public Response sayHello(@PathVariable("user_code") String userCode) {
        return userService.queryUserByCode(userCode);
    }

}

上述代码只是主要代码，关于swagger2的配置，与数据库的配置，还有基本类的封装详细请下载代码细看。

运行：必须按照下面数据运行

1.运行zookeeper

2.运行ManagerApplication

3.运行ConsumerApplication

4.在浏览器中输入：http://localhost:2001/swagger-ui.html，输入code=2001，显示该用户的详细信息

服务端日志：

消费端日志：