290_实战Dubbo+Zookeeper

目录

• 创建父项目
• 创建子模块-服务提供者
  • 编写服务
  • 修改端口号
• 创建子模块-服务消费者
  • 修改端口号
• 服务提供者导入依赖
  • 启动报错：No application config found or it's not a valid config! Please add <dubbo:application name="..." /> to your spring config.
• 服务提供者配置dubbo
• 服务提供者服务添加注解
• 启动zookeeper
• 启动服务提供者，注：先启动注册中心zookeeper
• 启动dubbo-admin查看监控
• 服务消费者导入依赖
• 服务消费者配置dubbo
• 服务消费者复制服务提供者的服务接口到相同的包下
• 服务消费者获取注册中心的服务
• 测试
• 总结

创建父项目

  ![image.png](https://cdn.nlark.com/yuque/0/2022/png/2707044/1643796042176-5b1df59c-c767-4350-8e51-152b7d1c8895.png#clientId=uc61de27b-c692-4&crop=0&crop=0&crop=1&crop=1&from=paste&height=634&id=ufd13b866&margin=%5Bobject%20Object%5D&name=image.png&originHeight=634&originWidth=818&originalType=binary&ratio=1&rotation=0&showTitle=false&size=71606&status=done&style=none&taskId=u9c6e6e2b-2374-4b85-a890-a69f4606aa2&title=&width=818)<br />![image.png](https://cdn.nlark.com/yuque/0/2022/png/2707044/1643796104490-061f8182-b106-4149-9951-117f92c5e75a.png#clientId=uc61de27b-c692-4&crop=0&crop=0&crop=1&crop=1&from=paste&height=634&id=u8a820e5f&margin=%5Bobject%20Object%5D&name=image.png&originHeight=634&originWidth=818&originalType=binary&ratio=1&rotation=0&showTitle=false&size=44419&status=done&style=none&taskId=u5cce027f-0859-46c8-9d5a-1fb59b035ec&title=&width=818)

创建子模块-服务提供者

编写服务

package com.qing.service;

public interface TicketService {

    public String getTicket();
}

package com.qing.service;

public class TicketServiceImpl implements TicketService {

    @Override
    public String getTicket() {
        return "水晶宫";
    }
}

修改端口号

server.port=8001

创建子模块-服务消费者

修改端口号

server.port=9001

服务提供者导入依赖

<!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-spring-boot-starter -->
<dependency>
    <groupId>org.apache.dubbo</groupId>
    <artifactId>dubbo-spring-boot-starter</artifactId>
    <version>3.0.5</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.github.sgroschupf/zkclient -->
<dependency>
    <groupId>com.github.sgroschupf</groupId>
    <artifactId>zkclient</artifactId>
    <version>0.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.curator/curator-framework -->
<dependency>
    <groupId>org.apache.curator</groupId>
    <artifactId>curator-framework</artifactId>
    <version>5.2.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.curator/curator-recipes -->
<dependency>
    <groupId>org.apache.curator</groupId>
    <artifactId>curator-recipes</artifactId>
    <version>5.2.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper -->
<dependency>
    <groupId>org.apache.zookeeper</groupId>
    <artifactId>zookeeper</artifactId>
    <version>3.7.0</version>
    <!--排除这个slf4j-log4j12-->
    <exclusions>
        <exclusion>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
        </exclusion>
    </exclusions>
</dependency>

<?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>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.qing</groupId>
    <artifactId>provider-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>provider-server</name>
    <description>provider-server</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-spring-boot-starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
						<version>3.0.5</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.github.sgroschupf/zkclient -->
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-framework -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>5.2.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-recipes -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>5.2.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper -->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.7.0</version>
            <!--排除这个slf4j-log4j12-->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

启动报错：No application config found or it's not a valid config! Please add <dubbo:application name="..." /> to your spring config.

参考文档：https://blog.csdn.net/yissan/article/details/113042223
解决方法：jdk1.8+dubbo版本是2.7.5版本

        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-spring-boot-starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
<!--            <version>3.0.5</version>-->
            <version>2.7.5</version>
        </dependency>

启动成功

服务提供者配置dubbo

server.port=8001

# 应用名称
dubbo.application.name=provider-server
# 注册中心地址
dubbo.registry.address=zookeeper://127.0.0.1:2181
# 那些服务要被注册
dubbo.scan.base-packages=com.qing.service

服务提供者服务添加注解

package com.qing.service;

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

@Service // dubbo的Service注解，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后尽量不要使用Spring框架的Service注解，因为dubbo也有Service注解
public class TicketServiceImpl implements TicketService {

    @Override
    public String getTicket() {
        return "水晶宫";
    }
}

启动zookeeper

启动服务提供者，注：先启动注册中心zookeeper

启动dubbo-admin查看监控

服务消费者导入依赖

<!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-spring-boot-starter -->
<dependency>
    <groupId>org.apache.dubbo</groupId>
    <artifactId>dubbo-spring-boot-starter</artifactId>
    <version>2.7.5</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.github.sgroschupf/zkclient -->
<dependency>
    <groupId>com.github.sgroschupf</groupId>
    <artifactId>zkclient</artifactId>
    <version>0.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.curator/curator-framework -->
<dependency>
    <groupId>org.apache.curator</groupId>
    <artifactId>curator-framework</artifactId>
    <version>5.2.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.curator/curator-recipes -->
<dependency>
    <groupId>org.apache.curator</groupId>
    <artifactId>curator-recipes</artifactId>
    <version>5.2.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper -->
<dependency>
    <groupId>org.apache.zookeeper</groupId>
    <artifactId>zookeeper</artifactId>
    <version>3.7.0</version>
    <!--排除这个slf4j-log4j12-->
    <exclusions>
        <exclusion>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
        </exclusion>
    </exclusions>
</dependency>

<?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>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.qing</groupId>
    <artifactId>consumer-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>consumer-server</name>
    <description>consumer-server</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-spring-boot-starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.7.5</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.github.sgroschupf/zkclient -->
        <dependency>
            <groupId>com.github.sgroschupf</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-framework -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>5.2.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-recipes -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>5.2.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper -->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.7.0</version>
            <!--排除这个slf4j-log4j12-->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

服务消费者配置dubbo

server.port=9001

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

服务消费者复制服务提供者的服务接口到相同的包下

服务消费者获取注册中心的服务

package com.qing.service;

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

@Service
public class UserService {

    @Reference // 引用，获取注册中心的服务
    TicketService ticketService;

    public void buyTicket() {
        String ticket = ticketService.getTicket();
        System.out.println("获取注册中心的服务=>" + ticket);
    }
}

测试

package com.qing;

import com.qing.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();
    }

}

总结