Dubbo系列之服务注册与发现

开发工具idea

1.首先启动zookeeper服务端

(1)先打包jar包(打开命令窗口cmd进入项目中mvn clean package )

(2)接着运行jar(打开项目进入到target里找到jar,然后cmd运行 java -jar dubbo-admin-0.0.1-SNAPSHOT.jar)

这样 zookeeper就运行成功了

 

2.启动dubbo-admin管理员

运行成功之后,访问: http://127.0.0.1:7001,输入默认的账号密码root/root,登录成功

 

3.Dubbo服务注册与发现

业务场景

 

4.api工程创建

api模块:dubbo-mall-interface

用户地址DTO类:

package com.ckf.mall.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class UserAddress implements Serializable {

    private Integer id;
    private String userAddress; //用户地址
    private String userId; //用户id
    private String consignee; //收货人
    private String phoneNum; //电话号码
    private String isDefault; //是否为默认地址    Y-是     N-否
}

 

用户信息服务接口:

package com.ckf.mall.service;



import com.ckf.mall.entity.UserAddress;

import java.util.List;

/**
 * 用户服务接口
 */
public interface UserService {

    /**
     * 按照用户id返回所有的收货地址
     * @param userId
     * @return
     */
    public List<UserAddress> getUserAddressList(String userId);
}

 

订单信息服务接口:

package com.ckf.mall.service;



import com.ckf.mall.entity.UserAddress;

import java.util.List;

/**
 * 订单服务接口
 */
public interface OrdersService {

    /**
     * 初始化订单
     * @param userId
     */
    public List<UserAddress> initOrder(String userId);
}

这样创api工程建好了

 

5.服务提供者工程

创建一个user-service-provider模块:

maven配置:

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

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

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.6.2</version>
        </dependency>

        <!-- 注册中心使用的是zookeeper,引入操作zookeeper的客户端端 -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>2.12.0</version>
        </dependency>
        <dependency>
<groupId>org.example</groupId>
<artifactId>dubbo-mall-interface</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>

 

resources加一个提供者的配置文件provider.xml

<?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://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd
        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <!-- 1、指定当前服务/应用的名字(同样的服务名字相同,不要和别的服务同名) -->
    <dubbo:application name="user-service-provider"></dubbo:application>

    <!-- 2、指定注册中心的位置 -->
    <!-- <dubbo:registry address="zookeeper://127.0.0.1:2181"></dubbo:registry> -->
    <dubbo:registry protocol="zookeeper" address="127.0.0.1:2181"></dubbo:registry>

    <!-- 3、指定通信规则(通信协议 通信端口) -->
    <dubbo:protocol name="dubbo" port="20882"></dubbo:protocol>

    <!-- 4、暴露服务   ref:指向服务的真正的实现对象 -->
    <dubbo:service interface="com.ckf.mall.service.UserService"
                   ref="userServiceImpl01" timeout="1000" version="1.0.0">
        <dubbo:method name="getUserAddressList" timeout="1000"></dubbo:method>
    </dubbo:service>

    <!--统一设置服务提供方的规则  -->
    <dubbo:provider timeout="1000"></dubbo:provider>

    <!-- 服务的实现 -->
    <bean id="userServiceImpl01" class="com.ckf.mall.service.impl.UserServiceImpl"></bean>

    <!-- 连接监控中心 -->
    <dubbo:monitor protocol="registry"></dubbo:monitor>

</beans>

 

业务实现类:

package com.ckf.mall.service.impl;

import com.alibaba.dubbo.config.annotation.Service;
import com.ckf.mall.entity.UserAddress;
import com.ckf.mall.service.UserService;
import org.springframework.stereotype.Component;

import java.util.Arrays;
import java.util.List;

/**
 * 服务提供者,需要用dubbo中的@Service来暴露服务
 */


public class UserServiceImpl implements UserService {


    @Override
    public List<UserAddress> getUserAddressList(String userId) {

        System.out.println("UserServiceImpl..3.....");
        UserAddress address1 = new UserAddress(1, "北京市昌平区宏福科技园综合楼3层", "1", "李老师", "010-56253825", "Y");
        UserAddress address2 = new UserAddress(2, "深圳市宝安区西部硅谷大厦B座3层(深圳分校)", "1", "王老师", "010-56253825", "N");
        UserAddress address3 = new UserAddress(3, "深圳市宝安区西部硅谷大厦B座8层(湛江分校)", "1", "陈老师", "010-56253825", "N");

        return Arrays.asList(address1,address2,address3);
    }
}

 

启动服务提供者,注册到Zookeeper:

package com.ckf.mall;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;


public class MainApplication {

    public static void main(String[] args) throws IOException {
        ClassPathXmlApplicationContext ioc = new ClassPathXmlApplicationContext("provider.xml");
        ioc.start();

        System.in.read();
    }

}

 

服务注册成功,可以去dubbo-admin看

 

6.服务消费者模块

服务已经注册了,现在创建一个消费者工程order-service-comsumer

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

        <dependency>
            <groupId>org.example</groupId>
            <artifactId>dubbo-mall-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.alibaba/dubbo -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.6.2</version>
        </dependency>
        <!-- 注册中心使用的是zookeeper,引入操作zookeeper的客户端端 -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>2.12.0</version>
        </dependency>

 

 消费者配置文件

consumer.xml 文件如下:

<?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://dubbo.apache.org/schema/dubbo"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
        http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd
        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    <context:component-scan base-package="com.ckf.mall.service.impl"></context:component-scan>

    <dubbo:application name="orders-service-consumer"></dubbo:application>

    <dubbo:registry address="zookeeper://127.0.0.1:2181"></dubbo:registry>

    <!--  配置本地存根-->

    <!--声明需要调用的远程服务的接口;生成远程服务代理  -->
    <!--
        1)、精确优先 (方法级优先,接口级次之,全局配置再次之)
        2)、消费者设置优先(如果级别一样,则消费方优先,提供方次之)
    -->
    <!-- timeout="0" 默认是1000ms-->
    <!-- retries="":重试次数,不包含第一次调用,0代表不重试-->
    <!-- 幂等(设置重试次数)【查询、删除、修改】、非幂等(不能设置重试次数)【新增】 -->
    <dubbo:reference interface="com.ckf.mall.service.UserService"
                     id="userService" timeout="5000" retries="3" version="*">
        <!-- <dubbo:method name="getUserAddressList" timeout="1000"></dubbo:method> -->
    </dubbo:reference>

    <!-- 配置当前消费者的统一规则:所有的服务都不检查 -->
    <dubbo:consumer check="false" timeout="5000"></dubbo:consumer>

    <dubbo:monitor protocol="registry"></dubbo:monitor>
    <!-- <dubbo:monitor address="127.0.0.1:7070"></dubbo:monitor> -->

</beans>

 

订单服务类:

package com.ckf.mall.service.impl;


import com.ckf.mall.entity.UserAddress;
import com.ckf.mall.service.OrdersService;
import com.ckf.mall.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class OrdersServiceImpl implements OrdersService {

    @Autowired
    UserService userService;

    @Override
    public List<UserAddress> initOrder(String userId) {
        System.out.println("用户id:"+userId);

        /**
         * 查询用户的收货地址
         */
        List<UserAddress> addressList = userService.getUserAddressList(userId);
        for (UserAddress userAddress : addressList) {
            System.out.println(userAddress.getUserAddress());
        }
        return addressList;
    }

}

 

消费者启动类:

package com.ckf.mall;

import com.ckf.mall.service.OrdersService;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;

public class MainApplication {

    @SuppressWarnings("resource")
    public static void main(String[] args) throws IOException {
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("consumer.xml");
        OrdersService orderService = applicationContext.getBean(OrdersService.class);
        orderService.initOrder("1");
        System.out.println("调用成功....");
        System.in.read();
    }

}

 

调用成功,控制台打印信息如下:

 

dubbo-admin查询消费者效果图如下:

 

首页效果如下:

 

 

 

还有一种方法使用注解的方式暴露服务

需要加入依赖如下:

<dependency> 
<groupId>com.alibaba.boot</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>0.2.0</version>
</dependency>

 

在服务供应者的实现类上加入@sevice(注意导入的是阿里巴巴的而不是spring的)

服务供应者类:

 

 

然后在启动类加上注解如下:

@EnableDubbo //开启基于注解的dubbo功能 
 
消费者就是通过控制器调用消费者实现类,然后消费者实现类再调用服务提供者项目中的userService对象(远程过程调用RPC)
注入@Reference (阿里巴巴的包注解)

 

 

码云地址:https://gitee.com/ckfeng/dubbo-mall.git

第二种方法实现的地址:https://gitee.com/ckfeng/ckf-mall-dobbo.git

 

就说到这了,该活动筋骨了.....
 
posted @ 2020-05-29 17:01  安详的苦丁茶  阅读(1481)  评论(0编辑  收藏  举报