整合spingBoot + dubbo + zookeeper实现分布式开发应用

环境搭建

项目结构图：

1.我们首先做好服务端

pom.xml

   <dependencies>
        
        <dependency>
            <groupId>org.apache.dubbogroupId>
            <artifactId>dubbo-spring-boot-starterartifactId>
            <version>2.7.3version>
        dependency>
        
        <dependency>
            <groupId>com.github.sgroschupfgroupId>
            <artifactId>zkclientartifactId>
            <version>0.1version>
        dependency>
        
        <dependency>
            <groupId>org.apache.curatorgroupId>
            <artifactId>curator-frameworkartifactId>
            <version>2.12.0version>
        dependency>
        <dependency>
            <groupId>org.apache.curatorgroupId>
            <artifactId>curator-recipesartifactId>
            <version>2.12.0version>
        dependency>
        <dependency>
            <groupId>org.apache.zookeepergroupId>
            <artifactId>zookeeperartifactId>
            <version>3.4.14version>
            
            <exclusions>
                <exclusion>
                    <groupId>org.slf4jgroupId>
                    <artifactId>slf4j-log4j12artifactId>
                exclusion>
            exclusions>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
    dependencies>

application.properties

server.port=8001
# 服务应用名字
dubbo.application.name=provider-server
# 注册中心地址
dubbo.registry.address=zookeeper://127.0.0.1:2181
# 哪些服务要被注册
dubbo.scan.base-packages=com.wlm.service

TicketService

package com.wlm.service;

public interface TicketService {
    public String getTicket();
}

TicketServiceImpl.java

package com.wlm.service;

import org.apache.dubbo.config.annotation.Service;
import org.springframework.stereotype.Component;

//zookeeper:服务注册与发现
@Service //可以被扫描到，在项目一启动就自动注册到注册中心
@Component //使用了Dubbo后尽量不要用Service注解
public class TicketServiceImpl implements TicketService {
    @Override
    public String getTicket() {
        return "咸鱼_翻身";
    }
}

2.启动服务端

打开服务端，开启之后不要点掉，让他在后台运行：

执行服务端的jar包，待会我们要监控服务端：

运行上面的服务端代码，然后去游览器中查看
http://localhost:7001/

3.我们再来做客户端

pom.xml

<dependencies>
        
        
        <dependency>
            <groupId>org.apache.dubbogroupId>
            <artifactId>dubbo-spring-boot-starterartifactId>
            <version>2.7.3version>
        dependency>
        
        <dependency>
            <groupId>com.github.sgroschupfgroupId>
            <artifactId>zkclientartifactId>
            <version>0.1version>
        dependency>
        
        <dependency>
            <groupId>org.apache.curatorgroupId>
            <artifactId>curator-frameworkartifactId>
            <version>2.12.0version>
        dependency>
        <dependency>
            <groupId>org.apache.curatorgroupId>
            <artifactId>curator-recipesartifactId>
            <version>2.12.0version>
        dependency>
        <dependency>
            <groupId>org.apache.zookeepergroupId>
            <artifactId>zookeeperartifactId>
            <version>3.4.14version>
            
            <exclusions>
                <exclusion>
                    <groupId>org.slf4jgroupId>
                    <artifactId>slf4j-log4j12artifactId>
                exclusion>
            exclusions>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
    dependencies>

application.properties

server.port=8002
# 消费者去哪里拿服务，需要暴露自己的名字
dubbo.application.name=consumer-server
# 注册中心的地址，可以在任何电脑上！
dubbo.registry.address=zookeeper://127.0.0.1:2181

TicketService

package com.wlm.service;

public interface TicketService {
    public String getTicket();
}

UserService.java

package com.wlm.service;

import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Service;

@Service //放到容器中，注意区分
public class UserService {
    //想拿到provider-server提供的票，要去注册中心拿到服务
    @Reference //引用， pom坐标，可以定义路径相同的接口名
    TicketService ticketService;

    public void buyTicket(){
        String ticket = ticketService.getTicket();
        System.out.println("在注册中心拿到=>"+ticket);
    }
}

ConsumerServerApplicationTests.java

package com.wlm;

import com.wlm.service.UserService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class ConsumerServerApplicationTests {

    @Autowired
    UserService userService;
    @Test
    void contextLoads() {
        userService.buyTicket();
    }

}

运行ConsumerServerApplicationTests.java结果：拿到服务端的”咸鱼_翻身“

4.总结

前提：zookeeper服务已经开启
1.首先提供者提供服务

• 导入依赖
• 配置注册中心的地址，以及服务发现名，和要扫描的包
• 在想要被注册的服务上面增加一个注解@Service

2.消费者如何消费

• 导入依赖
• 配置注册中心的地址，配置自己的服务名
• 从远程注入服务 @Reference