dubbo之整合SpringBoot

目录

zookeeper安装

1.拉取ZooKeeper镜像

2.新建文件夹

3.挂载本地文件夹并启动服务

4.查看容器

5.进入容器（zookeeper）

Dubbo Admin安装

1.下载dubbo-admin

 2.zip包解压

 3.修改配置文件

 4.打包项目

 5.启动jar

6.访问

 构建项目

api模块

1.创建实体类

2.创建测试接口

生产者模块

1.导入依赖

2.添加配置

3.编写启动类

4.添加mapper接口

5.实现接口

6.编写controller接口

7.调用接口

消费者模块

1.导入依赖

2.添加配置

3.编写启动类

4.调用生产者接口

5.调用接口

---

zookeeper安装

在docker下安装zookeeper

1.拉取ZooKeeper镜像

# 查看本地镜像
docker images
# 拉取ZooKeeper镜像最新版本
docker pull zookeeper:latest

2.新建文件夹

mkdir zookeeper

3.挂载本地文件夹并启动服务

docker run -d -e TZ="Asia/Shanghai" -p 2181:2181 -v /root/docker/zookeeper:/data --name zookeeper --restart always zookeeper

-d ：表示在一直在后台运行容器
-e TZ="Asia/Shanghai" ：指定上海时区
-p 2181:2181 ：对端口进行映射，将本地2181端口映射到容器内部的2181端口
-v ：将本地目录(文件)挂载到容器指定目录；
--name ：设置创建的容器名称
--restart always ：始终重新启动zookeeper

4.查看容器

docker ps

5.进入容器（zookeeper）

docker exec -it zookeeper bash      //只登录容器，不登录 zkCli
./bin/zkCli.sh    //执行脚本新建一个Client，即进入容器

Dubbo Admin安装

1.下载dubbo-admin

进入github，搜索dubbo-admin：https://github.com/apache/dubbo-admin

 2.zip包解压

 3.修改配置文件

D:\idealTestProjects\dubbo\dubbo-admin-develop\dubbo-admin-server\src\main\resources目录下，修改application.properties 配置文件

找到下面配置的注册中心的地址，修改为zookeeper注册中心的IP和端口，也可以自定义访问端口号

 4.打包项目

进入到D:\idealTestProjects\dubbo\dubbo-admin-develop\dubbo-admin-distribution目录下，按住shift+右键，打开power shell，执行清除并打包命令

mvn clean package -Dmaven.test.skip=true

都success后就成功了

 5.启动jar

在目录D:\idealTestProjects\dubbo\dubbo-admin-develop\dubbo-admin-distribution\target下，执行下面的命令启动dubbo-admin

java -jar .\dubbo-admin-0.5.0-SNAPSHOT.jar

6.访问

浏览器输入：43.139.136.235:6097,用户名密码都是root

 构建项目

api模块

项目结构：

1.创建实体类

@Data
public class User implements Serializable {private Long id;private String username;private String password;
}

注意：实体来要添加Serializable，否则会序列化报错

2.创建测试接口

public interface UserService {User selectUserById(Long id);
}

生产者模块

创建springboot项目：dubbo-develop-provider

1.导入依赖

    <dependencies><dependency><groupId>com.lgcgk</groupId><artifactId>dubbo-develop-api</artifactId><version>1.0-SNAPSHOT</version></dependency><!--dubbo 与 spring-boot 整合包--><dependency><groupId>org.apache.dubbo</groupId><artifactId>dubbo-spring-boot-starter</artifactId></dependency><!--springboot 启动核心包--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><!--springboot rest --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!---dubbo 与 zookeeper整合包 --><dependency><groupId>org.apache.dubbo</groupId><artifactId>dubbo-registry-zookeeper</artifactId></dependency><!--mysql相关的驱动--><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.3.0</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.1</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency></dependencies><build><resources><resource><!--   描述存放资源的目录，该路径相对POM路径--><directory>src/main/java</directory><includes><include>**/*.xml</include></includes></resource></resources><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build>

2.添加配置

server:port: 6050spring:application:name: dubbo-samples-prividerdatasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://127.0.0.1:3306/dubbo-sql?useSSL=false&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true&serverTimezone=GMT%2B8&nullCatalogMeansCurrent=true&allowPublicKeyRetrieval=trueusername: rootpassword: 123456
mybatis-plus:type-aliases-package: com.lgcgk.provider.entitymapper-locations: com/lgcgk/provider/mapper/*.xmldubbo:application:name: ${spring.application.name}registry:address: zookeeper://127.0.0.1:2181timeout: 200000protocol:name: dubboport: 20890scan:base-packages: com.lgcgk.provider.service.impl

dubbo配置：服务配置，用于暴露一个服务，定义服务的元信息，一个服务可以用多个协议暴露，一个服务也可以注册到多个注册中心

dubbo.protocol.name：dubbo服务名称

dubbo.protocol.port：dubbo服务端口

dubbo.registry.timeout:请求zookeeper超时时间

3.编写启动类

@EnableDubbo
@SpringBootApplication
@MapperScan("com.demo.provider.mapper")
public class ProviderApp {public static void main(String[] args) {SpringApplication.run(ProviderApp.class,args);System.out.println("生产者启动完毕");}
}

dubbo必须配置注解@EnableDubbo

@EnableDubbo：整合了三个注解@EnableDubboConfig、@DubboComponentScan、@EnableDubboLifecycle

        1.@EnableDubboConfig：将用于解析配置相关的类注册到spring容器

        2.@DubboComponentScan：用于指定@Service扫描路径

        3.@EnableDubboLifecycle：注册了两个监听器到spring容器

4.添加mapper接口

public interface UserMapper {User selectUserById(Long id);
}

xml：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.lgcgk.provider.mapper.UserMapper"><select id="selectUserById" resultType="com.lgcgk.api.entity.User">select * from user where id = #{id}</select>
</mapper>

5.实现接口

@DubboService
@AllArgsConstructor
public class UserServiceImpl implements UserService {UserMapper userMapper;public User selectUserById(Long id) {User user = userMapper.selectUserById(id);return user;}
}

1.@DubboService

在类上加入@DubboService注解，表示该Bean以ServiceBean形式注册到Spring容器中，以便后续创建Dubbo Service

2.@AllArgsConstructor

是lombok中的注解,作用在类上;使用后添加一个构造函数，该构造函数含有所有已声明字段属性参数;@Autowired和@resource可以用它来代替

6.编写controller接口

@RestController
@RequestMapping("/provider")
@AllArgsConstructor
public class UserController {UserService userService;@GetMapping("/selectUserById/{id}")public User selectUserById(@PathVariable("id")Long id){return userService.selectUserById(id);}}

7.调用接口

 

消费者模块

1.导入依赖

    <dependencies><!--dubbo-samples-springcloud-api 项目 依赖--><dependency><groupId>com.lgcgk</groupId><artifactId>dubbo-develop-api</artifactId><version>1.0-SNAPSHOT</version></dependency><dependency><groupId>org.apache.dubbo</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.apache.dubbo</groupId><artifactId>dubbo-registry-zookeeper</artifactId></dependency></dependencies>

2.添加配置

server:port: 6051
spring:application:name: dubbo-samples-consumerdubbo:application:name: ${spring.application.name}registry:address: zookeeper://127.0.0.1:2181timeout: 200000protocol:name: dubbo-consumer

3.编写启动类

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

4.调用生产者接口

@RestController
@RequestMapping("/consumer")
@Slf4j
public class ConsumerUserController {@DubboReference( protocol = "dubbo", loadbalance = "random")UserService userService;@RequestMapping("/selectUserById/{id}")public User getUser(@PathVariable("id") Long id) {User user = userService.selectUserById(id);log.info("response from provider: {}", user);return user;}}

@DubboReference：表名该类为Dubbo Reference，在需要调用的服务接口上使用即可直接调用远程服务。

protocol：调用的服务名

loadbalance：dubbo提供了4种负载均衡策略

        1.random：基于权重随机算法

        2.roundrobin：基于加权轮询算法

        3.leastactive：基于最少活跃调用数算法

        4.consistenthash：基于 hash 一致性

5.调用接口