【Java】dubbo框架
环境准备
- Centos8.0
- Zookeeper
- 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。
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:
即可看到左侧出现zookeeper侧边栏
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);
}
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
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.
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:
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
观察我们的zookeeper:
在启动order服务:OrderToMember.java
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.properties
、dubbo.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-monitordubbo.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
访问http://localhost:7001/
并输入账号:root,密码:root
点击 服务治理>服务
可以看到我们已注册的服务
点击服务:
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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