Spring Boot 集成 Dubbo 并且使用使用 zookeeper 作为注册中心
前言
本文全程在 Windos 下操作，大致操作与 Linux 相差无异，具体细节请百度，有条件的可以谷歌！
需要了解的知识点
- Dubbo 和 zookeeper 环境以及了解这两个是个什么东东
- Spring Boot 知识点，仅限于包结构 pom 依赖 继承等
- Maven 聚合工程
- JDK 和 tomcat 环境配置等
首先环境配置
JDK 8
Maven 3.x
Spring Boot 1.5.22
tomcat 8.x
Mysql 5.5
dubbo 2.5.4
zookeeper 3.5.8
关于 Dubbo、zookeeper 以及微服务是什么东西，请百度，如不知道就不要往下看了。
首选需要了解和安装 Dubbo 和 zookeeper 环境 可以查看 Windows 下搭建 dubbo 和 zookeeper 环境
搭建 Maven 聚合项目
先新建父级工程
输入项目名和 groupid 和 ArtifactId
然后在父级包上右键新建 Module
如下图，点击完成即可。
等等新建结束后点击父级 pom
可以看到子 maven 模块
项目结构
新建后的 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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.gamll</groupId>
<artifactId>gamll-parent</artifactId>
<version>1.0-SNAPSHOT</version>
<description> 父级 maven</description>
<modules>
<module>gmall-api</module>
<!-- <module>gmall_user</module>-->
<module>gmall-common-util</module>
<module>service-util</module>
<module>gmall-user-service-dir/gmall-user-service</module>
<module>gmall-user-service-dir/gmall-user-web</module>
</modules>
</project>引入 Spring Boot 依赖后 和 部分依赖后, 依赖维护
<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.gamll</groupId>
<artifactId>gamll-parent</artifactId>
<version>1.0-SNAPSHOT</version>
<description> 父级 maven</description>
<modules>
<module>gmall-api</module>
<!-- <module>gmall_user</module>-->
<module>gmall-common-util</module>
<module>service-util</module>
<module>gmall-user-service-dir/gmall-user-service</module>
<module>gmall-user-service-dir/gmall-user-web</module>
</modules>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.22.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<packaging>pom</packaging>
<!-- 定义依赖版本 -->
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<fastjson.version>1.2.46</fastjson.version>
<dubbo-starter.version>1.0.10</dubbo-starter.version>
<dubbo.version>2.6.0</dubbo.version>
<zkclient.version>0.10</zkclient.version>
<mybatis.version>1.3.1</mybatis.version>
<nekohtml.version>1.9.20</nekohtml.version>
<xml-apis.version>1.4.01</xml-apis.version>
<batik-ext.version>1.9.1</batik-ext.version>
<jsoup.version>1.11.2</jsoup.version>
<httpclient.version>4.5.5</httpclient.version>
<commons-lang3.version>3.7</commons-lang3.version>
<mapper-starter.version>1.2.3</mapper-starter.version>
<jedis.version>2.9.0</jedis.version>
<jest.version>5.3.2</jest.version>
<jna.version>4.5.1</jna.version>
<beanUtils.version>1.9.3</beanUtils.version>
</properties>
<!-- 依赖维护 -->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>${fastjson.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>${dubbo.version}</version>
</dependency>
<dependency>
<groupId>com.101tec</groupId>
<artifactId>zkclient</artifactId>
<version>${zkclient.version}</version>
</dependency>
<dependency>
<groupId>com.gitee.reger</groupId>
<artifactId>spring-boot-starter-dubbo</artifactId>
<version>${dubbo-starter.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>net.sourceforge.nekohtml</groupId>
<artifactId>nekohtml</artifactId>
<version>${nekohtml.version}</version>
</dependency>
<dependency>
<groupId>xml-apis</groupId>
<artifactId>xml-apis</artifactId>
<version>${xml-apis.version}</version>
</dependency>
<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>batik-ext</artifactId>
<version>${batik-ext.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.jsoup/jsoup -->
<dependency>
<groupId>org.jsoup</groupId>
<artifactId>jsoup</artifactId>
<version>${jsoup.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>${httpclient.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>${mapper-starter.version}</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>${jedis.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.searchbox/jest -->
<dependency>
<groupId>io.searchbox</groupId>
<artifactId>jest</artifactId>
<version>${jest.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/net.java.dev.jna/jna -->
<dependency>
<groupId>net.java.dev.jna</groupId>
<artifactId>jna</artifactId>
<version>${jna.version}</version>
</dependency>
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
<version>${beanUtils.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
</project>gmall-api
存放实体类，和定义 service 接口
gmall-common-util
存放一些通用的工具方法以及 service 和 controller 都通用的依赖
service-util
存放 service 需要的一些依赖 比如数据库驱动 redis 等。
然后 gmall-user-service-dir 文件夹存放 dubbo 服务提供者和消费者
新建如上所示
gmall-user-service 服务提供者
gmall-user-web 消费者
以上每个子模块 中继承父级的 pom 依赖
<parent>
<artifactId>gamll-parent</artifactId>
<groupId>com.gamll</groupId>
<version>1.0-SNAPSHOT</version>
</parent>这里只贴 gmall-common-util 的 pom 文件，其他子模块结构的都一样
<?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">
<!-- 继承父级的 maven 依赖 -- >
<parent>
<artifactId>gamll-parent</artifactId>
<groupId>com.gamll</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>gmall-common-util</artifactId>
</project>各模块引入自己的依赖 jar
gmall-common-util
<?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>gamll-parent</artifactId>
<groupId>com.gamll</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>gmall-common-util</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
</dependency>
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
</dependency>
<!--dubbo 框架依赖 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
</dependency>
<dependency>
<groupId>com.101tec</groupId>
<artifactId>zkclient</artifactId>
<!-- 排除 log4g12 日志 -->
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- 与 sb 整合 dubbo-->
<dependency>
<groupId>com.gitee.reger</groupId>
<artifactId>spring-boot-starter-dubbo</artifactId>
</dependency>
</dependencies>
</project>gmall-api
<?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>gamll-parent</artifactId>
<groupId>com.gamll</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>gmall-api</artifactId>
<description> 用户实体类服务 </description>
<dependencies>
<!-- 通用 mapper -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>1.2.3</version>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
</project>gmall-user-service
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>gamll-parent</artifactId>
<groupId>com.gamll</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.gmall</groupId>
<artifactId>gmall-user-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>gmall-user-service</name>
<description> 用户服务生产者 , 也就是 dubbo 提供端 </description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>com.gamll</groupId>
<artifactId>gmall-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.gamll</groupId>
<artifactId>service-util</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.gmalluser</groupId>
<artifactId>gmall_user</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
gmall-user-web
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>gamll-parent</artifactId>
<groupId>com.gamll</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>com.gmall</groupId>
<artifactId>gmall-user-web</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>gmall-user-web</name>
<description> 用户服务消费者 也就是 dubbo 消费端 对外的接口 </description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>com.gamll</groupId>
<artifactId>gmall-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.gamll</groupId>
<artifactId>service-util</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<!-- Description:
Cannot determine embedded database driver class for database type NONE-->
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
service-util
<?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>gamll-parent</artifactId>
<groupId>com.gamll</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>service-util</artifactId>
<dependencies>
<dependency>
<groupId>com.gamll</groupId>
<artifactId>gmall-common-util</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
</dependency>
<!-- 通用 mapper -->
<!-- <dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>1.2.3</version>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</exclusion>
</exclusions>
</dependency>
-->
</dependencies>
</project>搭建 dobbo 提供者和消费者
maven 子模块服务提供者 gmall-user-service 和消费者 gmall-user-web
服务提供者
这里面新建 数据库访问 和 和 service 实现类 同时在 yml 里配置将服务注册到 中
UmsMemberMapper
这里面提供 dao 查询接口 继承通用 mapper 接口
实体类依赖在 gmall-api 模块中
Mapper 依赖在service-util 模块中
@Mapper
public interface UmsMemberMapper extends tk.mybatis.mapper.common.Mapper<UmsMember> {
/**
* 查询所有
* @return
*/
List<UmsMember> selectAllUmsMebers();}UmsMemberMapper.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.gmall.gmall.user.service.dao.UmsMemberMapper">
<resultMap id="BaseResultMap" type="com.gamll.api.bean.UmsMember">
<id column="id" property="id" jdbcType="BIGINT"/>
<result column="member_level_id" property="memberLevelId" jdbcType="BIGINT"/>
<result column="username" property="username" jdbcType="VARCHAR"/>
<result column="password" property="password" jdbcType="VARCHAR"/>
<result column="nickname" property="nickname" jdbcType="VARCHAR"/>
<result column="phone" property="phone" jdbcType="VARCHAR"/>
<result column="status" property="status" jdbcType="INTEGER"/>
<result column="create_time" property="createTime" jdbcType="TIMESTAMP"/>
<result column="icon" property="icon" jdbcType="VARCHAR"/>
<result column="gender" property="gender" jdbcType="INTEGER"/>
<result column="birthday" property="birthday" jdbcType="DATE"/>
<result column="city" property="city" jdbcType="VARCHAR"/>
<result column="job" property="job" jdbcType="VARCHAR"/>
<result column="personalized_signature" property="personalizedSignature" jdbcType="VARCHAR"/>
<result column="source_type" property="sourceType" jdbcType="INTEGER"/>
<result column="integration" property="integration" jdbcType="INTEGER"/>
<result column="growth" property="growth" jdbcType="INTEGER"/>
<result column="luckey_count" property="luckeyCount" jdbcType="INTEGER"/>
<result column="history_integration" property="historyIntegration" jdbcType="INTEGER"/>
</resultMap>
<sql id="Base_Column_List">
id, member_level_id, username, password, nickname, phone, status, create_time, icon,
gender, birthday, city, job, personalized_signature, source_type, integration, growth,
luckey_count, history_integration
</sql>
<!-- 查询所有 -->
<select id="selectAllUmsMebers" resultType="com.gamll.api.bean.UmsMember">
select
<include refid="Base_Column_List"/>
from ums_member
</select>
</mapper>ums_member sql 语句
CREATE TABLE `ums_member` (`id` bigint(20) NOT NULL AUTO_INCREMENT,
`member_level_id` bigint(20) DEFAULT NULL,
`username` varchar(64) DEFAULT NULL COMMENT '用户名',
`password` varchar(64) DEFAULT NULL COMMENT '密码',
`nickname` varchar(64) DEFAULT NULL COMMENT '昵称',
`phone` varchar(64) DEFAULT NULL COMMENT '手机号码',
`status` int(1) DEFAULT NULL COMMENT '帐号启用状态:0-> 禁用；1-> 启用',
`create_time` datetime DEFAULT NULL COMMENT '注册时间',
`icon` varchar(500) DEFAULT NULL COMMENT '头像',
`gender` int(1) DEFAULT NULL COMMENT '性别：0-> 未知；1-> 男；2-> 女',
`birthday` date DEFAULT NULL COMMENT '生日',
`city` varchar(64) DEFAULT NULL COMMENT '所做城市',
`job` varchar(100) DEFAULT NULL COMMENT '职业',
`personalized_signature` varchar(200) DEFAULT NULL COMMENT '个性签名',
`source_type` int(1) DEFAULT NULL COMMENT '用户来源',
`integration` int(11) DEFAULT NULL COMMENT '积分',
`growth` int(11) DEFAULT NULL COMMENT '成长值',
`luckey_count` int(11) DEFAULT NULL COMMENT '剩余抽奖次数',
`history_integration` int(11) DEFAULT NULL COMMENT '历史积分数量',
PRIMARY KEY (`id`),
UNIQUE KEY `idx_username` (`username`),
UNIQUE KEY `idx_phone` (`phone`)
) ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=utf8 COMMENT='会员表';服务提供者类
UmsMemberServiceImpl
需要注意的是以前我们在单体服务中 service 实现类采用 Spring 提供的 @service 注解将 bean 注入到 IOC 容器中
但现在我们是用 dubbo 实现微服务，需要使用 dubbo 的 @service 注解将该服务注册到 zookeeper 中，让消费者从容器中获取进行消费。
` 顾名思义就是提供服务供别人调用的，相当于 spring 中的 Service 的实现类。
使用也很简单，就是一个注解加一份配置
提供端在实现类上增加注解 @Service，和 spring 的是一样的但是引的包是不一样的。`
package com.gmall.gmall.user.service.impl;
import com.alibaba.dubbo.config.annotation.Service;
import com.gamll.api.bean.UmsMember;
import com.gamll.api.service.UmsMemberService;
import com.gmall.gmall.user.service.dao.UmsMemberMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
@Service // 这里 @Service 注解需要使用 dubbo 的注解
public class UmsMemberServiceImpl implements UmsMemberService {
@Autowired
private UmsMemberMapper umsMemberMapper;
@Override
public List<UmsMember> getUmsMemberList() {return umsMemberMapper.selectAllUmsMebers();
}
@Override
public UmsMember findUmsMemberById(long id) {return umsMemberMapper.selectByPrimaryKey(id);
}
@Override
@Transactional(rollbackFor = {Exception.class,RuntimeException.class})
public int addUmsMember(UmsMember umb) {return umsMemberMapper.insert(umb);
}
@Override
@Transactional(rollbackFor = {Exception.class,RuntimeException.class})
public int updateUmsMember(UmsMember umb) {return umsMemberMapper.updateByPrimaryKey(umb);
}
}
main 方法
需要开启 Mapper 扫描 这里使用了通用 Mapper 必须用到通用 mapper 的 @MapperScan 注解扫描 mapper
以及开启事务
@SpringBootApplication
@tk.mybatis.spring.annotation.MapperScan("com.gmall.gmall.user.service.dao")
@EnableTransactionManagement
public class GmallUserServiceApplication {public static void main(String[] args) {SpringApplication.run(GmallUserServiceApplication.class, args);
}
}
最后 yml 中配置注册中心以及 dubbo 中的服务信息以及 mybatis 的配置
server:
port: 10002
spring:
datasource:
url: jdbc:mysql://127.0.0.1:3306/gmall0105?useunicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai
username: root
password: root
driver-class-name: com.mysql.jdbc.Driver
dubbo:
# dubbo 中的服务名称
application:
name: user-service-server
protocol:
# dubbo 中的通信协议名称
name: dubbo
registry:
# zookeeper 注册中心的地址加端口号
address: 127.0.0.1:2181
# zookeeper 注册中心协议
protocol: zookeeper
# dubbo 的服务扫描路径
base-package: com.gmall
#mybatis 映射 xml 和 pojo 映射
mybatis:
type-aliases-package: com.gmalluser.pojo
mapper-locations: classpath:mapper/*.xml
logging:
level: debug
最后启动一下 Spring Boot
别忘了启动 dubbo 和 zookeeper
可以看到已经将服务注册到 zookeeper 中了
打开 dubbo 服务监控页面
可以看到服务提供者
服务消费者
上面已经将服务注册到 zookeeper 中了，这里我们将服务拿出来进行消费
首先配置 Yml
配置注册地址端口等协议
server:
port: 10003
spring:
dubbo:
# dubbo 中的服务名称
application:
name: user-web
protocol:
# dubbo 中的通信协议名称
name: dubbo
registry:
# zookeeper 注册中心的地址加端口号
address: 127.0.0.1:2181
# zookeeper 注册中心协议
protocol: zookeeper
# dubbo 的服务扫描路径
base-package: com.gmall
consumer:
# 访问提供端服务的超时时间，默认是 1000 毫秒
timeout: 30000
# 是启动消费端时，是否检查服务端能否正常访问。如果选择 true，那启动消费端时，必须保证提供端服务正常，否则接口无法注入
check: false
UmsMemberController
新建 controller 消费服务查询数据
以前在单体中我们是从 IOC 容器中将 bean 拿出来然后调用方法进行查询，但在 dubbo 分布式项目中是用 dubbo 的 service 也就是用 @Reference 将服务从 zookeeper 拿出来，注入到 controller 中 然后调用指定方法进行查询
@RequestMapping("/api/umb")
@RestController
public class UmsMemberController {
//dubbo 的 service
@Reference
private UmsMemberService umsMemberService;
@RequestMapping("/findAll")
public List<UmsMember> all() {return umsMemberService.getUmsMemberList();
}
@RequestMapping("/findById")
public UmsMember all(long id) {return umsMemberService.findUmsMemberById(id);
}
}然后启动消费者
如果启动报错
java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
at com.alibaba.dubbo.config.AbstractConfig.toString(AbstractConfig.java:474) ~[dubbo-2.6.2.jar:2.6.2]
at java.lang.String.valueOf(String.java:2994) [na:1.8.0_181]
at java.lang.StringBuilder.append(StringBuilder.java:131) [na:1.8.0_181]
at com.alibaba.dubbo.config.spring.beans.factory.annotation.AbstractAnnotationConfigBeanBuilder.build(AbstractAnnotationConfigBeanBuilder.java:79) [dubbo-2.6.2.jar:2.6.2]
at com.alibaba.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.buildReferenceBean(ReferenceAnnotationBeanPostProcessor.java:385) [dubbo-2.6.2.jar:2.6.2]
at com.alibaba.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.access$100(ReferenceAnnotationBeanPostProcessor.java:65) [dubbo-2.6.2.jar:2.6.2]
at com.alibaba.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor$ReferenceFieldElement.inject(ReferenceAnnotationBeanPostProcessor.java:363) [dubbo-2.6.2.jar:2.6.2]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at com.alibaba.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.postProcessPropertyValues(ReferenceAnnotationBeanPostProcessor.java:92) [dubbo-2.6.2.jar:2.6.2]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1400) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1247) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1167) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1395) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) [spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:849) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at com.springboot.dubbo.DubboApplication.main(DubboApplication.java:12) ~[classes/:na]
Caused by: java.lang.IllegalStateException: Failed to check the status of the service com.spring.boot.service.UserService. No provider available for the service com.spring.boot.service.UserService from the url zookeeper://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=spring-boot-dubbo-consumer&dubbo=2.6.2&interface=com.spring.boot.service.UserService&methods=getUser&pid=40168®ister.ip=192.168.1.5&side=consumer×tamp=1553586960033 to the consumer 192.168.1.5 use dubbo version 2.6.2
at com.alibaba.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:422) ~[dubbo-2.6.2.jar:2.6.2]
at com.alibaba.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:333) ~[dubbo-2.6.2.jar:2.6.2]
at com.alibaba.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:163) ~[dubbo-2.6.2.jar:2.6.2]
at com.alibaba.dubbo.config.spring.ReferenceBean.getObject(ReferenceBean.java:66) ~[dubbo-2.6.2.jar:2.6.2]
... 43 common frames omitted
是因为 main 方法上服务提供者的主类上没有配置注解
@SpringBootApplication
@EnableDubbo
public class GmallUserWebApplication {public static void main(String[] args) {SpringApplication.run(GmallUserWebApplication.class, args);
}
}
然后启动即可
可以发现成功注册
调用查询接口测试
发现成功查询出数据
分布式就可以基于这种方式实现不同模块间的调用。每一个实现服务的消费端和提供端分离。
dubbo 和 zookeeper 分布式架构
执行流程：
- Provider：服务的提供者，负责对外提供服务，提供者在启动的时候，需要向 Registry 注册自己能够提供
的服务
- Consumer：服务的消费者，消费者在启动的时候，需要向 Registry 订阅自己需要的服务
- Registry：注册中心，授受注册和订阅，会异步的通知订阅者，向消费者提供服务列表
当消费者需要执行远程过程调用时，会从 Registry 获取到服务地址列表（基于负载均衡算法）进行调用，
如果调用失败会重新选择新的提供者再次调用
- Monitor：监控中心，统计服务的调用次数和调用时间，服务消费者和提供者会在内存中累计调用次数和
调用时间，定时每分钟向监控中心发送一次统计数据
代码地址 分支 gmall0105