dubbo+zookeeper分布式部署

一. 环境搭建

1.启动zookeeper

2.启动Dubbo

用命令行启动-jar

3.访问http://localhost:7001

4. IDEA创建一个空项目；

到此环境搭建完成

二. SpringBoot + Dubbo + zookeeper

1.创建一个模块，实现服务提供者：provider-server ， 选择web依赖即可

编写接口

package com.example.service;

public interface TicketService {
    public String init();
}

编写实现类
注意导包问题

package com.example.service;

import org.apache.dubbo.config.annotation.Service;

@Service //注意导包问题
public class TicketServiceImpl implements TicketService {
    @Override
    public String init() {
       return "初始化服务";
    }
}

2.创建一个模块，实现服务消费者：consumer-server ， 选择web依赖即可

编写service

package com.example.service;

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

@Service
public class UserService {

    @Reference
    TicketService ticketService;

    public void init(){
        String init = ticketService.init();
        System.out.println("在注册中心买到"+init);
    }

}

3. 将服务提供者注册到注册中心去

1. 这里我们需要整合Dubbo和zookeeper，所以需要导包

我们从dubbo官网进入github，看下方的帮助文档，找到dubbo-springboot，找到依赖包

<!-- Dubbo Spring Boot Starter -->
    <dependency>
        <groupId>org.apache.dubbo</groupId>
        <artifactId>dubbo-spring-boot-starter</artifactId>
        <version>2.7.3</version>
    </dependency>

zookeeper的包我们去maven仓库下载，zkclient；

<!-- https://mvnrepository.com/artifact/com.github.sgroschupf/zkclient -->
<dependency>
    <groupId>com.github.sgroschupf</groupId>
    <artifactId>zkclient</artifactId>
    <version>0.1</version>
</dependency>

【新版的坑】zookeeper及其依赖包，解决日志冲突，还需要剔除日志依赖；

<!-- 引入zookeeper -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>2.12.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.12.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.14</version>
            <!--排除这个slf4j-log4j12-->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

2. 在springboot配置文件中配置dubbo相关属性！

#当前应用名字
dubbo.application.name=provider-server
#注册中心地址
dubbo.registry.address=zookeeper://127.0.0.1:2181
#扫描指定包下服务
dubbo.scan.base-packages=com.kuang.provider.service

4. 消费者从注册中心拿到服务

1.导入依赖，和之前的依赖一样；

<!--dubbo-->
        <!-- Dubbo Spring Boot Starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.3</version>
        </dependency>
        <!--zookeeper-->
        <!-- https://mvnrepository.com/artifact/com.github.sgroschupf/zkclient -->
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>
        <!-- 引入zookeeper -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>2.12.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>2.12.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.14</version>
            <!--排除这个slf4j-log4j12-->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

2.配置参数

#当前应用名字
dubbo.application.name=consumer-server
#注册中心地址
dubbo.registry.address=zookeeper://127.0.0.1:2181

3. 测试类编写；

@RunWith(SpringRunner.class)
@SpringBootTest
public class ConsumerServiceApplicationTests {

    @Autowired
    UserService service;

    @Test
    public void contextLoads() {
        service.init();
    }

}

启动项目成功！！！。

参考狂神