1

环境准备

  1. Centos8.0
  2. Zookeeper
  3. IDEA

当然也可以安装到win10上,不过本文是安装在linux上的。
参考文档:centos8安装zookeeper(单机方式)
注:zookeeper-3.5.6版本全部替换zookeeper-3.6.2即可
我按照上述文章安装部署没遇到坑,就不再赘述。

Zookeeper客户端插件

我们直接在 IDEA 上点击 File>Settings>Plugins 然后搜索zookeeper,install后重启即可。
image.png
如果查找不到点击我帮你解决
安装好插件后点击 File>Settings>Other Settings依次点击:
image.png
即可看到左侧出现zookeeper侧边栏
image.png

构建模块

依次创建:

member模块(只有api,并不提供实现):springboot_duboo_member_api
member Service(依赖member模块,api的实现):

springboot_dubbo_member_service_api

order模块(依赖member模块):

spring_dubbo_order_service

member模块

member接口:MemberService.java

package com.baba.wlb.member.service;

/**
 * @Author wulongbo
 * @Date 2020/12/31 11:48
 * @Version 1.0
 */
public interface MemberService {
    public String getUser(Long userId);
}

image.png
子模块中没有启动类,需要在pom中排除一下依赖:
pom.xml

<?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>springboot_emqx</artifactId>
        <groupId>com.baba.wlb</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springboot_duboo_member_api</artifactId>

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

member实现类模块

member实现类接口:MemberServiceImpl.java

package com.baba.wlb.member.service.impl;


import com.baba.wlb.member.service.MemberService;

/**
 * @Author wulongbo
 * @Date 2020/12/31 11:52
 * @Version 1.0
 */
public class MemberServiceImpl implements MemberService {

    public String getUser(Long userId) {
        System.out.println("order服务调用member服务 userId:" + userId);
        return "order服务调用member服务";
    }
}

spring-provider.xml配置类:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
             http://www.springframework.org/schema/beans/spring-beans.xsd
             http://code.alibabatech.com/schema/dubbo
             http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <!-- 提供方应用信息,用于计算依赖关系 在dubbo-admin或dubbo-monitor 会显示这个名字,方便辨识 -->
    <dubbo:application name="hello-world-app"/>
    <!-- 使用zookeeper/multicast广播注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://39.102.56.91:2181"/>
    <!-- 用dubbo协议在20880端口暴露服务 -->
    <dubbo:protocol name="dubbo" port="20880"/>
    <!-- 声明需要暴露的服务接口 -->
    <dubbo:service interface="com.baba.wlb.member.service.MemberService" ref="memberService" protocol="dubbo"/>
    <!-- 具体实现该接口的bean -->
    <bean id="memberService" class="com.baba.wlb.member.service.impl.MemberServiceImpl"/>

</beans>

application启动类:AppMemberApplication.java

package com.baba.wlb.member.service.impl;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;

/**
 * @Author wulongbo
 * @Date 2020/12/31 14:44
 * @Version 1.0
 */
public class AppMemberApplication {
    public static void main(String[] args) throws IOException {
        ClassPathXmlApplicationContext applicationContext=new ClassPathXmlApplicationContext("spring-provider.xml");
        applicationContext.start();
        System.out.println("member服务启动成功...");
        System.in.read();// 保持服务一直在运行
    }
}

核心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>springboot_emqx</artifactId>
        <groupId>com.baba.wlb</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springboot_dubbo_member_service_api</artifactId>

    <dependencies>

        <dependency>
            <groupId>com.baba.wlb</groupId>
            <artifactId>springboot_duboo_member_api</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>

        <!--ZK客户端工具-->
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
<!--            <exclusions>-->
<!--                <exclusion>-->
<!--                    <groupId>org.slf4j</groupId>-->
<!--                    <artifactId>slf4j-log4j12</artifactId>-->
<!--                </exclusion>-->
<!--            </exclusions>-->
            <version>0.10</version>
        </dependency>

        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>

        <!--dubbo底层框架基于netty实现-->
        <dependency>
            <groupId>org.jboss.netty</groupId>
            <artifactId>netty</artifactId>
            <version>3.2.5.Final</version>
        </dependency>

        <!--spring框架组件-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>

        <!--dubbo框架-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.jboss.netty</groupId>
                    <artifactId>netty</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

    </dependencies>

</project>

注:这里需要排除slf4j依赖,如果启动报错可以手动删除冲突jar
image.png
由于删除了相关jar后,后台启动会报错:

log4j:WARN No appenders could be found for logger (com.alibaba.dubbo.common.logger.LoggerFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

image.png
我们只需在 resource目录下手动添加 log4j.properties即可:

log4j.rootLogger=DEBUG, Console
#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

子模块截图:
image.png

order服务模块

application启动类:OrderToMember.java

package com.baba.wlb.order;

import com.baba.wlb.member.service.MemberService;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * @Author wulongbo
 * @Date 2020/12/31 15:56
 * @Version 1.0
 */
public class OrderToMember {

    public static void main(String[] args) {
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("consumer.xml");
        MemberService memberService = applicationContext.getBean(MemberService.class);
        String resultUser = memberService.getUser(1l);
        applicationContext.start();
        System.out.println("order服务调用member服务返回结果:" + resultUser);
    }
}

consumer.xml配置类:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://code.alibabatech.com/schema/dubbo
    http://code.alibabatech.com/schema/dubbo/dubbo.xsd">


    <!-- 消费方应用名,用于计算依赖关系,不是匹配条件,不要与提供方一样 -->
    <dubbo:application name="order-consumer"/>

    <!--     使用multicast广播注册中心暴露发现服务地址 -->
    <!--     <dubbo:registry address="multicast://224.5.6.7:1234" /> -->

    <!-- 使用zk广播注册中心暴露服务地址 -->
    <dubbo:registry id="zk1" address="zookeeper://39.102.56.91:2181" protocol="zookeeper"/>

    <!-- 指定是用zk-->
    <dubbo:consumer registry="zk1"/>

    <!-- 生成远程服务代理,可以和本地bean一样使用demoService -->
    <dubbo:reference id="memberService" interface="com.baba.wlb.member.service.MemberService"/>

</beans>

pom文件依赖于member模块,copy member服务的就OK

<?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>springboot_emqx</artifactId>
        <groupId>com.baba.wlb</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>spring_dubbo_order_service</artifactId>

    <dependencies>

        <dependency>
            <groupId>com.baba.wlb</groupId>
            <artifactId>springboot_duboo_member_api</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>

        <!--ZK客户端工具-->
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <!--            <exclusions>-->
            <!--                <exclusion>-->
            <!--                    <groupId>org.slf4j</groupId>-->
            <!--                    <artifactId>slf4j-log4j12</artifactId>-->
            <!--                </exclusion>-->
            <!--            </exclusions>-->
            <version>0.10</version>
        </dependency>

        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>

        <!--dubbo底层框架基于netty实现-->
        <dependency>
            <groupId>org.jboss.netty</groupId>
            <artifactId>netty</artifactId>
            <version>3.2.5.Final</version>
        </dependency>

        <!--spring框架组件-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>

        <!--dubbo框架-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.jboss.netty</groupId>
                    <artifactId>netty</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

    </dependencies>

</project>

启动服务

duboo流程分析:1.Provider注册到注册中心Registry(zookeeper)中>2.当节点发生变化的时候,注册中心通过事件通知的方式通知给Consumer(tcp长链接的方式),对比Eureka则是每隔一段时间定时去查,http协议做心跳的方式>3.Consumer获取到value真实地址后采用本地RPC远程调用技术进行访问接口>4.每一次Consumer调用Provider,监控中心Monitor都会做一次记录

启动member服务:AppMemberApplication.java
image.png
观察我们的zookeeper:
image.png
在启动order服务:OrderToMember.java
image.png
发现我们调用成功!
注:这里不再是jar包调用jar包的方式,因为这里我们只是引用了接口,并没有引用实现,实现都是通过底层转换成netty,dubbo调用的过程

dubbo-admin平台

底层实现连接zookeeper信息,进行解析并转换成页面进行展示。

公共的资源dubbo-admin下载地址

我们使用老版本,所以切换分支至master,点击下载,将zip包解压之后,使用IDEA打开项目。
或者直接在此地址打开并下载dubbo-admin
打开项目后:

首先执行clean操作,其次执行install操作
老版本:由于我 zookeeper 是安装在linux上的,所以需要修改application.propertiesdubbo.properties两个文件,如果是本地安装的可以跳过下面步骤。

可以根据自身情况修改一些参数

application.properties
# 设置端口
server.port=7001
spring.velocity.cache=false
spring.velocity.charset=UTF-8
spring.velocity.layout-url=/templates/default.vm
spring.messages.fallback-to-system-locale=false
spring.messages.basename=i18n/message
spring.root.password=root
spring.guest.password=guest
dubbo.registry.address=zookeeper://39.102.56.91:2181
dubbo.properties
dubbo.container=log4j,spring,registry,jetty-monitor
dubbo.application.name=simple-monitor
dubbo.application.owner=dubbo
#dubbo.registry.address=multicast://224.5.6.7:1234
dubbo.registry.address=zookeeper://39.102.56.91:2181
#dubbo.registry.address=redis://127.0.0.1:6379
#dubbo.registry.address=dubbo://127.0.0.1:9090
dubbo.protocol.port=7070
dubbo.jetty.port=8080
dubbo.jetty.directory=${user.home}/monitor
dubbo.charts.directory=${user.home}/monitor/charts
dubbo.statistics.directory=${user.home}/monitor/statistics
dubbo.log4j.file=logs/dubbo-monitor-simple.log
dubbo.log4j.level=WARN

启动DubboAdminApplication.java
image.png
访问http://localhost:7001/
并输入账号:root,密码:root
image.png
点击 服务治理>服务 可以看到我们已注册的服务
image.png
点击服务:
image.png
此外我们还可以看到日志,版本等信息!
至此,spring就完成了简单的dubbo集成,我们也可以用springboot来集成更简便!


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