RocketMQ-02

╰+攻爆jí腚メ 2024-03-02 04:23 45阅读 0赞

## 1. 案例介绍 ##

### 1.1 业务分析 ###

模拟电商网站购物场景中的【下单】和【支付】业务

\#\#\#1）下单

![463239a9fe35bed27d4f510bff8b4ebf.png][]

1.  用户请求订单系统下单
2.  订单系统通过RPC调用订单服务下单
3.  订单服务调用优惠券服务，扣减优惠券
4.  订单服务调用调用库存服务，校验并扣减库存
5.  订单服务调用用户服务，扣减用户余额
6.  订单服务完成确认订单

--------------------

\#\#\#2）支付

![7cbc4a8613d369260071596af043d666.png][]

1.  用户请求支付系统
2.  支付系统调用第三方支付平台API进行发起支付流程
3.  用户通过第三方支付平台支付成功后，第三方支付平台回调通知支付系统
4.  支付系统调用订单服务修改订单状态
5.  支付系统调用积分服务添加积分
6.  支付系统调用日志服务记录日志

### 1.2 问题分析 ###

#### 问题1 ####

用户提交订单后，扣减库存成功、扣减优惠券成功、使用余额成功，但是在确认订单操作失败，需要对库存、库存、余额进行回退。

如何保证数据的完整性？

![1e2707ce106925811abaadee5a91f177.png][]

使用MQ保证在下单失败后系统数据的完整性

![外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传][20230724024159.png_origin_url_https_3A_2F_2Fgitee.com_2FHoneyAndSherry_2Fpicture_2Fraw_2Fmaster_2FRocketMQ.assets_2F_E4_B8_8B_E5_8D_95_E6_97_B6_E5_BA_8F_E5_9B_BE_282_pos_id_img-Hpn09Ohg-1695104433311_29.png]

\#\#\#问题2

用户通过第三方支付平台（支付宝、微信）支付成功后，第三方支付平台要通过回调API异步通知商家支付系统用户支付结果，支付系统根据支付结果修改订单状态、记录支付日志和给用户增加积分。

商家支付系统如何保证在收到第三方支付平台的异步通知时，如何快速给第三方支付凭条做出回应？

![1c6052569db98af743cf7efca2c41cef.png][]

通过MQ进行数据分发，提高系统处理性能

![ac7d288f015bcca4983046d9336a25ac.png][]

## 2. 技术分析 ##

### 2.1 技术选型 ###

*  SpringBoot
 *  Dubbo
 *  Zookeeper
 *  RocketMQ
 *  Mysql

![3df9bddc8ceb56b034902c5db1940a43.png][]

### 2.2 SpringBoot整合RocketMQ ###

下载[rocketmq-spring][]项目

将rocketmq-spring安装到本地仓库

mvn install -Dmaven.skip.test=true

#### 2.2.1 消息生产者 ####

##### 1）添加依赖 #####

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
    </parent>
    
    <properties>
        <rocketmq-spring-boot-starter-version>2.0.3</rocketmq-spring-boot-starter-version>
    </properties>
    
    <dependencies>
        <dependency>
            <groupId>org.apache.rocketmq</groupId>
            <artifactId>rocketmq-spring-boot-starter</artifactId>
            <version>${rocketmq-spring-boot-starter-version}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.6</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    
    </dependencies>

##### 2）配置文件 #####

# application.properties
    rocketmq.name-server=192.168.25.135:9876;192.168.25.138:9876
    rocketmq.producer.group=my-group

##### 3）启动类 #####

@SpringBootApplication
    public class MQProducerApplication {
        
        public static void main(String[] args) {
        
            SpringApplication.run(MQSpringBootApplication.class);
        }
    }

##### 4）测试类 #####

@RunWith(SpringRunner.class)
    @SpringBootTest(classes = {
        MQSpringBootApplication.class})
    public class ProducerTest {
        
    
        @Autowired
        private RocketMQTemplate rocketMQTemplate;
    
        @Test
        public void test1(){
        
            rocketMQTemplate.convertAndSend("springboot-mq","hello springboot rocketmq");
        }
    }

#### 2.2.2 消息消费者 ####

##### 1）添加依赖 #####

同消息生产者

##### 2）配置文件 #####

同消息生产者

##### 3）启动类 #####

@SpringBootApplication
    public class MQConsumerApplication {
        
        public static void main(String[] args) {
        
            SpringApplication.run(MQSpringBootApplication.class);
        }
    }

##### 4）消息监听器 #####

@Slf4j
    @Component
    @RocketMQMessageListener(topic = "springboot-mq",consumerGroup = "springboot-mq-consumer-1")
    public class Consumer implements RocketMQListener<String> {
        
    
        @Override
        public void onMessage(String message) {
        
            log.info("Receive message："+message);
        }
    }

### 2.3 SpringBoot整合Dubbo ###

下载[dubbo-spring-boot-starter][]依赖包

将`dubbo-spring-boot-starter`安装到本地仓库

mvn install -Dmaven.skip.test=true

![在这里插入图片描述][c8f599ea747d454289afc10f22ed806c.png]

#### 2.3.1 搭建Zookeeper集群 ####

##### 1）准备工作 #####

1.  安装JDK
2.  将Zookeeper上传到服务器
3.  解压Zookeeper，并创建data目录，将conf下的zoo\_sample.cfg文件改名为zoo.cfg
4.  建立`/user/local/zookeeper-cluster`,将解压后的Zookeeper复制到以下三个目录

/usr/local/zookeeper-cluster/zookeeper-1
    /usr/local/zookeeper-cluster/zookeeper-2
    /usr/local/zookeeper-cluster/zookeeper-3

1.  配置每一个 Zookeeper 的 dataDir（zoo.cfg） clientPort 分别为 2181 2182 2183
    
    修改`/usr/local/zookeeper-cluster/zookeeper-1/conf/zoo.cfg`

clientPort=2181
    dataDir=/usr/local/zookeeper-cluster/zookeeper-1/data

修改/usr/local/zookeeper-cluster/zookeeper-2/conf/zoo.cfg

clientPort=2182
    dataDir=/usr/local/zookeeper-cluster/zookeeper-2/data

修改/usr/local/zookeeper-cluster/zookeeper-3/conf/zoo.cfg

clientPort=2183
    dataDir=/usr/local/zookeeper-cluster/zookeeper-3/data

##### 2）配置集群 #####

1.  在每个 zookeeper 的 data 目录下创建一个 myid 文件，内容分别是 1、2、3 。这个文件就是记录每个服务器的 ID
2.  在每一个 zookeeper 的 zoo.cfg 配置客户端访问端口（clientPort）和集群服务器 IP 列表。
    
    集群服务器 IP 列表如下

server.1=192.168.25.140:2881:3881
    server.2=192.168.25.140:2882:3882
    server.3=192.168.25.140:2883:3883

解释：server.服务器 ID=服务器 IP 地址：服务器之间通信端口：服务器之间投票选举端口

##### 3）启动集群 #####

启动集群就是分别启动每个实例。

![在这里插入图片描述][acc738ae290e40858105ca44a1502865.png]

#### 2.3.2 RPC服务接口 ####

public interface IUserService {
        
        public String sayHello(String name);
    }

#### 2.3.3 服务提供者 ####

##### 1）添加依赖 #####

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
    </parent>
    
    <dependencies>
        
        <dependency>
            <groupId>com.alibaba.spring.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.0.0</version>
        </dependency>
    	
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>log4j-to-slf4j</artifactId>
                    <groupId>org.apache.logging.log4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
    	
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.10</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>log4j</groupId>
                    <artifactId>log4j</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.9</version>
            <exclusions>
                <exclusion>
                    <artifactId>slf4j-log4j12</artifactId>
                    <groupId>org.slf4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
    	
        <dependency>
            <groupId>com.itheima.demo</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    
    </dependencies>

##### 2）配置文件 #####

# application.properties
    spring.application.name=dubbo-demo-provider
    spring.dubbo.application.id=dubbo-demo-provider
    spring.dubbo.application.name=dubbo-demo-provider
    spring.dubbo.registry.address=zookeeper://192.168.25.140:2181;zookeeper://192.168.25.140:2182;zookeeper://192.168.25.140:2183
    spring.dubbo.server=true
    spring.dubbo.protocol.name=dubbo
    spring.dubbo.protocol.port=20880

##### 3）启动类 #####

@EnableDubboConfiguration
    @SpringBootApplication
    public class ProviderBootstrap {
        
    
        public static void main(String[] args) throws IOException {
        
            SpringApplication.run(ProviderBootstrap.class,args);
        }
    
    }

##### 4）服务实现 #####

@Component
    @Service(interfaceClass = IUserService.class)
    public class UserServiceImpl implements IUserService{
        
        @Override
        public String sayHello(String name) {
        
            return "hello:"+name;
        }
    }

#### 2.3.4 服务消费者 ####

##### 1）添加依赖 #####

<parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.1.RELEASE</version>
        </parent>
    
    <dependencies>
    
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    
        
        <dependency>
            <groupId>com.alibaba.spring.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>2.0.0</version>
        </dependency>
    
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>log4j-to-slf4j</artifactId>
                    <groupId>org.apache.logging.log4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
    
        
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.10</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>log4j</groupId>
                    <artifactId>log4j</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.9</version>
            <exclusions>
                <exclusion>
                    <artifactId>slf4j-log4j12</artifactId>
                    <groupId>org.slf4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
    
        
        <dependency>
            <groupId>com.itheima.demo</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    
    </dependencies>

##### 2）配置文件 #####

# application.properties
    spring.application.name=dubbo-demo-consumer
    spring.dubbo.application.name=dubbo-demo-consumer
    spring.dubbo.application.id=dubbo-demo-consumer
        spring.dubbo.registry.address=zookeeper://192.168.25.140:2181;zookeeper://192.168.25.140:2182;zookeeper://192.168.25.140:2183

##### 3）启动类 #####

@EnableDubboConfiguration
    @SpringBootApplication
    public class ConsumerBootstrap {
        
        public static void main(String[] args) {
        
            SpringApplication.run(ConsumerBootstrap.class);
        }
    }

##### 4）Controller #####

@RestController
    @RequestMapping("/user")
    public class UserController {
        
    
        @Reference
        private IUserService userService;
    
        @RequestMapping("/sayHello")
        public String sayHello(String name){
        
            return userService.sayHello(name);
        }
    
    }

## 3. 环境搭建 ##

### 3.1 数据库 ###

#### 1）优惠券表 ####

<table> 
 <thead> 
  <tr> 
   <th>Field</th> 
   <th>Type</th> 
   <th>Comment</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>coupon_id</td> 
   <td>bigint(50) NOT NULL</td> 
   <td>优惠券ID</td> 
  </tr> 
  <tr> 
   <td>coupon_price</td> 
   <td>decimal(10,2) NULL</td> 
   <td>优惠券金额</td> 
  </tr> 
  <tr> 
   <td>user_id</td> 
   <td>bigint(50) NULL</td> 
   <td>用户ID</td> 
  </tr> 
  <tr> 
   <td>order_id</td> 
   <td>bigint(32) NULL</td> 
   <td>订单ID</td> 
  </tr> 
  <tr> 
   <td>is_used</td> 
   <td>int(1) NULL</td> 
   <td>是否使用 0未使用 1已使用</td> 
  </tr> 
  <tr> 
   <td>used_time</td> 
   <td>timestamp NULL</td> 
   <td>使用时间</td> 
  </tr> 
 </tbody> 
</table>

#### 2）商品表 ####

<table> 
 <thead> 
  <tr> 
   <th>Field</th> 
   <th>Type</th> 
   <th>Comment</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>goods_id</td> 
   <td>bigint(50) NOT NULL</td> 
   <td>主键</td> 
  </tr> 
  <tr> 
   <td>goods_name</td> 
   <td>varchar(255) NULL</td> 
   <td>商品名称</td> 
  </tr> 
  <tr> 
   <td>goods_number</td> 
   <td>int(11) NULL</td> 
   <td>商品库存</td> 
  </tr> 
  <tr> 
   <td>goods_price</td> 
   <td>decimal(10,2) NULL</td> 
   <td>商品价格</td> 
  </tr> 
  <tr> 
   <td>goods_desc</td> 
   <td>varchar(255) NULL</td> 
   <td>商品描述</td> 
  </tr> 
  <tr> 
   <td>add_time</td> 
   <td>timestamp NULL</td> 
   <td>添加时间</td> 
  </tr> 
 </tbody> 
</table>

#### 3）订单表 ####

<table> 
 <thead> 
  <tr> 
   <th>Field</th> 
   <th>Type</th> 
   <th>Comment</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>order_id</td> 
   <td>bigint(50) NOT NULL</td> 
   <td>订单ID</td> 
  </tr> 
  <tr> 
   <td>user_id</td> 
   <td>bigint(50) NULL</td> 
   <td>用户ID</td> 
  </tr> 
  <tr> 
   <td>order_status</td> 
   <td>int(1) NULL</td> 
   <td>订单状态 0未确认 1已确认 2已取消 3无效 4退款</td> 
  </tr> 
  <tr> 
   <td>pay_status</td> 
   <td>int(1) NULL</td> 
   <td>支付状态 0未支付 1支付中 2已支付</td> 
  </tr> 
  <tr> 
   <td>shipping_status</td> 
   <td>int(1) NULL</td> 
   <td>发货状态 0未发货 1已发货 2已退货</td> 
  </tr> 
  <tr> 
   <td>address</td> 
   <td>varchar(255) NULL</td> 
   <td>收货地址</td> 
  </tr> 
  <tr> 
   <td>consignee</td> 
   <td>varchar(255) NULL</td> 
   <td>收货人</td> 
  </tr> 
  <tr> 
   <td>goods_id</td> 
   <td>bigint(50) NULL</td> 
   <td>商品ID</td> 
  </tr> 
  <tr> 
   <td>goods_number</td> 
   <td>int(11) NULL</td> 
   <td>商品数量</td> 
  </tr> 
  <tr> 
   <td>goods_price</td> 
   <td>decimal(10,2) NULL</td> 
   <td>商品价格</td> 
  </tr> 
  <tr> 
   <td>goods_amount</td> 
   <td>decimal(10,0) NULL</td> 
   <td>商品总价</td> 
  </tr> 
  <tr> 
   <td>shipping_fee</td> 
   <td>decimal(10,2) NULL</td> 
   <td>运费</td> 
  </tr> 
  <tr> 
   <td>order_amount</td> 
   <td>decimal(10,2) NULL</td> 
   <td>订单价格</td> 
  </tr> 
  <tr> 
   <td>coupon_id</td> 
   <td>bigint(50) NULL</td> 
   <td>优惠券ID</td> 
  </tr> 
  <tr> 
   <td>coupon_paid</td> 
   <td>decimal(10,2) NULL</td> 
   <td>优惠券</td> 
  </tr> 
  <tr> 
   <td>money_paid</td> 
   <td>decimal(10,2) NULL</td> 
   <td>已付金额</td> 
  </tr> 
  <tr> 
   <td>pay_amount</td> 
   <td>decimal(10,2) NULL</td> 
   <td>支付金额</td> 
  </tr> 
  <tr> 
   <td>add_time</td> 
   <td>timestamp NULL</td> 
   <td>创建时间</td> 
  </tr> 
  <tr> 
   <td>confirm_time</td> 
   <td>timestamp NULL</td> 
   <td>订单确认时间</td> 
  </tr> 
  <tr> 
   <td>pay_time</td> 
   <td>timestamp NULL</td> 
   <td>支付时间</td> 
  </tr> 
 </tbody> 
</table>

#### 4）订单商品日志表 ####

<table> 
 <thead> 
  <tr> 
   <th>Field</th> 
   <th>Type</th> 
   <th>Comment</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>goods_id</td> 
   <td>int(11) NOT NULL</td> 
   <td>商品ID</td> 
  </tr> 
  <tr> 
   <td>order_id</td> 
   <td>varchar(32) NOT NULL</td> 
   <td>订单ID</td> 
  </tr> 
  <tr> 
   <td>goods_number</td> 
   <td>int(11) NULL</td> 
   <td>库存数量</td> 
  </tr> 
  <tr> 
   <td>log_time</td> 
   <td>datetime NULL</td> 
   <td>记录时间</td> 
  </tr> 
 </tbody> 
</table>

#### 5）用户表 ####

<table> 
 <thead> 
  <tr> 
   <th>Field</th> 
   <th>Type</th> 
   <th>Comment</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>user_id</td> 
   <td>bigint(50) NOT NULL</td> 
   <td>用户ID</td> 
  </tr> 
  <tr> 
   <td>user_name</td> 
   <td>varchar(255) NULL</td> 
   <td>用户姓名</td> 
  </tr> 
  <tr> 
   <td>user_password</td> 
   <td>varchar(255) NULL</td> 
   <td>用户密码</td> 
  </tr> 
  <tr> 
   <td>user_mobile</td> 
   <td>varchar(255) NULL</td> 
   <td>手机号</td> 
  </tr> 
  <tr> 
   <td>user_score</td> 
   <td>int(11) NULL</td> 
   <td>积分</td> 
  </tr> 
  <tr> 
   <td>user_reg_time</td> 
   <td>timestamp NULL</td> 
   <td>注册时间</td> 
  </tr> 
  <tr> 
   <td>user_money</td> 
   <td>decimal(10,0) NULL</td> 
   <td>用户余额</td> 
  </tr> 
 </tbody> 
</table>

#### 6）用户余额日志表 ####

<table> 
 <thead> 
  <tr> 
   <th>Field</th> 
   <th>Type</th> 
   <th>Comment</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>user_id</td> 
   <td>bigint(50) NOT NULL</td> 
   <td>用户ID</td> 
  </tr> 
  <tr> 
   <td>order_id</td> 
   <td>bigint(50) NOT NULL</td> 
   <td>订单ID</td> 
  </tr> 
  <tr> 
   <td>money_log_type</td> 
   <td>int(1) NOT NULL</td> 
   <td>日志类型 1订单付款 2 订单退款</td> 
  </tr> 
  <tr> 
   <td>use_money</td> 
   <td>decimal(10,2) NULL</td> 
   <td>操作金额</td> 
  </tr> 
  <tr> 
   <td>create_time</td> 
   <td>timestamp NULL</td> 
   <td>日志时间</td> 
  </tr> 
 </tbody> 
</table>

#### 7）订单支付表 ####

<table> 
 <thead> 
  <tr> 
   <th>Field</th> 
   <th>Type</th> 
   <th>Comment</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>pay_id</td> 
   <td>bigint(50) NOT NULL</td> 
   <td>支付编号</td> 
  </tr> 
  <tr> 
   <td>order_id</td> 
   <td>bigint(50) NULL</td> 
   <td>订单编号</td> 
  </tr> 
  <tr> 
   <td>pay_amount</td> 
   <td>decimal(10,2) NULL</td> 
   <td>支付金额</td> 
  </tr> 
  <tr> 
   <td>is_paid</td> 
   <td>int(1) NULL</td> 
   <td>是否已支付 1否 2是</td> 
  </tr> 
 </tbody> 
</table>

#### 8）MQ消息生产表 ####

<table> 
 <thead> 
  <tr> 
   <th>Field</th> 
   <th>Type</th> 
   <th>Comment</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>id</td> 
   <td>varchar(100) NOT NULL</td> 
   <td>主键</td> 
  </tr> 
  <tr> 
   <td>group_name</td> 
   <td>varchar(100) NULL</td> 
   <td>生产者组名</td> 
  </tr> 
  <tr> 
   <td>msg_topic</td> 
   <td>varchar(100) NULL</td> 
   <td>消息主题</td> 
  </tr> 
  <tr> 
   <td>msg_tag</td> 
   <td>varchar(100) NULL</td> 
   <td>Tag</td> 
  </tr> 
  <tr> 
   <td>msg_key</td> 
   <td>varchar(100) NULL</td> 
   <td>Key</td> 
  </tr> 
  <tr> 
   <td>msg_body</td> 
   <td>varchar(500) NULL</td> 
   <td>消息内容</td> 
  </tr> 
  <tr> 
   <td>msg_status</td> 
   <td>int(1) NULL</td> 
   <td>0:未处理;1:已经处理</td> 
  </tr> 
  <tr> 
   <td>create_time</td> 
   <td>timestamp NOT NULL</td> 
   <td>记录时间</td> 
  </tr> 
 </tbody> 
</table>

\#\#\#9）MQ消息消费表

<table> 
 <thead> 
  <tr> 
   <th>Field</th> 
   <th>Type</th> 
   <th>Comment</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>msg_id</td> 
   <td>varchar(50) NULL</td> 
   <td>消息ID</td> 
  </tr> 
  <tr> 
   <td>group_name</td> 
   <td>varchar(100) NOT NULL</td> 
   <td>消费者组名</td> 
  </tr> 
  <tr> 
   <td>msg_tag</td> 
   <td>varchar(100) NOT NULL</td> 
   <td>Tag</td> 
  </tr> 
  <tr> 
   <td>msg_key</td> 
   <td>varchar(100) NOT NULL</td> 
   <td>Key</td> 
  </tr> 
  <tr> 
   <td>msg_body</td> 
   <td>varchar(500) NULL</td> 
   <td>消息体</td> 
  </tr> 
  <tr> 
   <td>consumer_status</td> 
   <td>int(1) NULL</td> 
   <td>0:正在处理;1:处理成功;2:处理失败</td> 
  </tr> 
  <tr> 
   <td>consumer_times</td> 
   <td>int(1) NULL</td> 
   <td>消费次数</td> 
  </tr> 
  <tr> 
   <td>consumer_timestamp</td> 
   <td>timestamp NULL</td> 
   <td>消费时间</td> 
  </tr> 
  <tr> 
   <td>remark</td> 
   <td>varchar(500) NULL</td> 
   <td>备注</td> 
  </tr> 
 </tbody> 
</table>

### 3.2 项目初始化 ###

shop系统基于Maven进行项目管理

#### 3.1.1 工程浏览 ####

![020470165aa7be360f53c63b49cfb082.png][]

*  父工程：shop-parent
 *  订单系统：shop-order-web
 *  支付系统：shop-pay-web
 *  优惠券服务：shop-coupon-service
 *  订单服务：shop-order-service
 *  支付服务：shop-pay-service
 *  商品服务：shop-goods-service
 *  用户服务：shop-user-service
 *  实体类：shop-pojo
 *  持久层：shop-dao
 *  接口层：shop-api
 *  工具工程：shop-common

共12个系统

#### 3.1.2 工程关系 ####

![3df9bddc8ceb56b034902c5db1940a43.png][]

### 3.3 Mybatis逆向工程使用 ###

#### 1）代码生成 ####

使用Mybatis逆向工程针对数据表生成CURD持久层代码

\#\#\#2）代码导入

*  将实体类导入到shop-pojo工程
 *  在服务层工程中导入对应的Mapper类和对应配置文件

### 3.4 公共类介绍 ###

*  ID生成器
    
    IDWorker：Twitter雪花算法
 *  异常处理类
    
    CustomerException：自定义异常类
    
    CastException：异常抛出类
 *  常量类
    
    ShopCode：系统状态类
 *  响应实体类
    
    Result：封装响应状态和响应信息

## 4. 下单业务 ##

![在这里插入图片描述][5a91ff70ea884ca5ba8ba58838af1e29.png]

### 4.1 下单基本流程 ###

#### 1）接口定义 ####

*  IOrderService

public interface IOrderService {
        
        /**
         * 确认订单
         * @param order
         * @return Result
         */
        Result confirmOrder(TradeOrder order);
    }

\#\#\#2）业务类实现

@Slf4j
    @Component
    @Service(interfaceClass = IOrderService.class)
    public class OrderServiceImpl implements IOrderService {
        
    
        @Override
        public Result confirmOrder(TradeOrder order) {
        
            //1.校验订单
           
            //2.生成预订单
           
            try {
        
                //3.扣减库存
                
                //4.扣减优惠券
               
                //5.使用余额
               
                //6.确认订单
                
                //7.返回成功状态
               
            } catch (Exception e) {
        
                //1.确认订单失败,发送消息
                
                //2.返回失败状态
            }
    
        }
    }

\#\#\#3）校验订单

![在这里插入图片描述][e9b1a8e7e25e4d69a35a3b928d1ba021.png]

private void checkOrder(TradeOrder order) {
        
            //1.校验订单是否存在
            if(order==null){
        
                CastException.cast(ShopCode.SHOP_ORDER_INVALID);
            }
            //2.校验订单中的商品是否存在
            TradeGoods goods = goodsService.findOne(order.getGoodsId());
            if(goods==null){
        
                CastException.cast(ShopCode.SHOP_GOODS_NO_EXIST);
            }
            //3.校验下单用户是否存在
            TradeUser user = userService.findOne(order.getUserId());
            if(user==null){
        
                CastException.cast(ShopCode.SHOP_USER_NO_EXIST);
            }
            //4.校验商品单价是否合法
            if(order.getGoodsPrice().compareTo(goods.getGoodsPrice())!=0){
        
                CastException.cast(ShopCode.SHOP_GOODS_PRICE_INVALID);
            }
            //5.校验订单商品数量是否合法
            if(order.getGoodsNumber()>=goods.getGoodsNumber()){
        
                CastException.cast(ShopCode.SHOP_GOODS_NUM_NOT_ENOUGH);
            }
    
            log.info("校验订单通过");
    }

\#\#\#4）生成预订单

![21991ceae1e098de5a96caae5bac01d1.png][]

private Long savePreOrder(TradeOrder order) {
        
            //1.设置订单状态为不可见
            order.setOrderStatus(ShopCode.SHOP_ORDER_NO_CONFIRM.getCode());
            //2.订单ID
            order.setOrderId(idWorker.nextId());
            //核算运费是否正确
            BigDecimal shippingFee = calculateShippingFee(order.getOrderAmount());
            if (order.getShippingFee().compareTo(shippingFee) != 0) {
        
                CastException.cast(ShopCode.SHOP_ORDER_SHIPPINGFEE_INVALID);
            }
            //3.计算订单总价格是否正确
            BigDecimal orderAmount = order.getGoodsPrice().multiply(new BigDecimal(order.getGoodsNumber()));
            orderAmount.add(shippingFee);
            if (orderAmount.compareTo(order.getOrderAmount()) != 0) {
        
                CastException.cast(ShopCode.SHOP_ORDERAMOUNT_INVALID);
            }
    
            //4.判断优惠券信息是否合法
            Long couponId = order.getCouponId();
            if (couponId != null) {
        
                TradeCoupon coupon = couponService.findOne(couponId);
                //优惠券不存在
                if (coupon == null) {
        
                    CastException.cast(ShopCode.SHOP_COUPON_NO_EXIST);
                }
                //优惠券已经使用
                if ((ShopCode.SHOP_COUPON_ISUSED.getCode().toString())
                    .equals(coupon.getIsUsed().toString())) {
        
                    CastException.cast(ShopCode.SHOP_COUPON_INVALIED);
                }
                order.setCouponPaid(coupon.getCouponPrice());
            } else {
        
                order.setCouponPaid(BigDecimal.ZERO);
            }
    
            //5.判断余额是否正确
            BigDecimal moneyPaid = order.getMoneyPaid();
            if (moneyPaid != null) {
        
                //比较余额是否大于0
                int r = order.getMoneyPaid().compareTo(BigDecimal.ZERO);
                //余额小于0
                if (r == -1) {
        
                    CastException.cast(ShopCode.SHOP_MONEY_PAID_LESS_ZERO);
                }
                //余额大于0
                if (r == 1) {
        
                    //查询用户信息
                    TradeUser user = userService.findOne(order.getUserId());
                    if (user == null) {
        
                        CastException.cast(ShopCode.SHOP_USER_NO_EXIST);
                    }
                //比较余额是否大于用户账户余额
                if (user.getUserMoney().compareTo(order.getMoneyPaid().longValue()) == -1) {
        
                    CastException.cast(ShopCode.SHOP_MONEY_PAID_INVALID);
                }
                order.setMoneyPaid(order.getMoneyPaid());
            }
        } else {
        
            order.setMoneyPaid(BigDecimal.ZERO);
        }
        //计算订单支付总价
        order.setPayAmount(orderAmount.subtract(order.getCouponPaid())
                           .subtract(order.getMoneyPaid()));
        //设置订单添加时间
        order.setAddTime(new Date());
    
        //保存预订单
        int r = orderMapper.insert(order);
        if (ShopCode.SHOP_SUCCESS.getCode() != r) {
        
            CastException.cast(ShopCode.SHOP_ORDER_SAVE_ERROR);
        }
        log.info("订单:["+order.getOrderId()+"]预订单生成成功");
        return order.getOrderId();
    }

\#\#\#5）扣减库存

*  通过dubbo调用商品服务完成扣减库存

private void reduceGoodsNum(TradeOrder order) {
        
            TradeGoodsNumberLog goodsNumberLog = new TradeGoodsNumberLog();
            goodsNumberLog.setGoodsId(order.getGoodsId());
            goodsNumberLog.setOrderId(order.getOrderId());
            goodsNumberLog.setGoodsNumber(order.getGoodsNumber());
            Result result = goodsService.reduceGoodsNum(goodsNumberLog);
            if (result.getSuccess().equals(ShopCode.SHOP_FAIL.getSuccess())) {
        
                CastException.cast(ShopCode.SHOP_REDUCE_GOODS_NUM_FAIL);
            }
            log.info("订单:["+order.getOrderId()+"]扣减库存["+order.getGoodsNumber()+"个]成功");
        }

*  商品服务GoodsService扣减库存

@Override
    public Result reduceGoodsNum(TradeGoodsNumberLog goodsNumberLog) {
        
        if (goodsNumberLog == null ||
                goodsNumberLog.getGoodsNumber() == null ||
                goodsNumberLog.getOrderId() == null ||
                goodsNumberLog.getGoodsNumber() == null ||
                goodsNumberLog.getGoodsNumber().intValue() <= 0) {
        
            CastException.cast(ShopCode.SHOP_REQUEST_PARAMETER_VALID);
        }
        TradeGoods goods = goodsMapper.selectByPrimaryKey(goodsNumberLog.getGoodsId());
        if(goods.getGoodsNumber()<goodsNumberLog.getGoodsNumber()){
        
            //库存不足
            CastException.cast(ShopCode.SHOP_GOODS_NUM_NOT_ENOUGH);
        }
        //减库存
        goods.setGoodsNumber(goods.getGoodsNumber()-goodsNumberLog.getGoodsNumber());
        goodsMapper.updateByPrimaryKey(goods);
    
    
        //记录库存操作日志
        goodsNumberLog.setGoodsNumber(-(goodsNumberLog.getGoodsNumber()));
        goodsNumberLog.setLogTime(new Date());
        goodsNumberLogMapper.insert(goodsNumberLog);
    
        return new Result(ShopCode.SHOP_SUCCESS.getSuccess(),ShopCode.SHOP_SUCCESS.getMessage());
    }

\#\#\#6）扣减优惠券

*  通过dubbo完成扣减优惠券

private void changeCoponStatus(TradeOrder order) {
        
        //判断用户是否使用优惠券
        if (!StringUtils.isEmpty(order.getCouponId())) {
        
            //封装优惠券对象
            TradeCoupon coupon = couponService.findOne(order.getCouponId());
            coupon.setIsUsed(ShopCode.SHOP_COUPON_ISUSED.getCode());
            coupon.setUsedTime(new Date());
            coupon.setOrderId(order.getOrderId());
            Result result = couponService.changeCouponStatus(coupon);
            //判断执行结果
            if (result.getSuccess().equals(ShopCode.SHOP_FAIL.getSuccess())) {
        
                //优惠券使用失败
                CastException.cast(ShopCode.SHOP_COUPON_USE_FAIL);
            }
            log.info("订单:["+order.getOrderId()+"]使用扣减优惠券["+coupon.getCouponPrice()+"元]成功");
        }
    
    }

*  优惠券服务CouponService更改优惠券状态

@Override
    public Result changeCouponStatus(TradeCoupon coupon) {
        
        try {
        
            //判断请求参数是否合法
            if (coupon == null || StringUtils.isEmpty(coupon.getCouponId())) {
        
                CastException.cast(ShopCode.SHOP_REQUEST_PARAMETER_VALID);
            }
    		//更新优惠券状态为已使用
            couponMapper.updateByPrimaryKey(coupon);
            return new Result(ShopCode.SHOP_SUCCESS.getSuccess(), ShopCode.SHOP_SUCCESS.getMessage());
        } catch (Exception e) {
        
            return new Result(ShopCode.SHOP_FAIL.getSuccess(), ShopCode.SHOP_FAIL.getMessage());
        }
    }

\#\#\#7）扣减用户余额

*  通过用户服务完成扣减余额

private void reduceMoneyPaid(TradeOrder order) {
        
        //判断订单中使用的余额是否合法
        if (order.getMoneyPaid() != null && order.getMoneyPaid().compareTo(BigDecimal.ZERO) == 1) {
        
            TradeUserMoneyLog userMoneyLog = new TradeUserMoneyLog();
            userMoneyLog.setOrderId(order.getOrderId());
            userMoneyLog.setUserId(order.getUserId());
            userMoneyLog.setUseMoney(order.getMoneyPaid());
            userMoneyLog.setMoneyLogType(ShopCode.SHOP_USER_MONEY_PAID.getCode());
            //扣减余额
            Result result = userService.changeUserMoney(userMoneyLog);
            if (result.getSuccess().equals(ShopCode.SHOP_FAIL.getSuccess())) {
        
                CastException.cast(ShopCode.SHOP_USER_MONEY_REDUCE_FAIL);
            }
            log.info("订单:["+order.getOrderId()+"扣减余额["+order.getMoneyPaid()+"元]成功]");
        }
    }

*  用户服务UserService,更新余额

![a320fe282f52816ac8c2f57c28685ad7.png][]

@Override
    public Result changeUserMoney(TradeUserMoneyLog userMoneyLog) {
        
        //判断请求参数是否合法
        if (userMoneyLog == null
                || userMoneyLog.getUserId() == null
                || userMoneyLog.getUseMoney() == null
                || userMoneyLog.getOrderId() == null
                || userMoneyLog.getUseMoney().compareTo(BigDecimal.ZERO) <= 0) {
        
            CastException.cast(ShopCode.SHOP_REQUEST_PARAMETER_VALID);
        }
    
        //查询该订单是否存在付款记录
        TradeUserMoneyLogExample userMoneyLogExample = new TradeUserMoneyLogExample();
        userMoneyLogExample.createCriteria()
                .andUserIdEqualTo(userMoneyLog.getUserId())
                .andOrderIdEqualTo(userMoneyLog.getOrderId());
       int count = userMoneyLogMapper.countByExample(userMoneyLogExample);
       TradeUser tradeUser = new TradeUser();
       tradeUser.setUserId(userMoneyLog.getUserId());
       tradeUser.setUserMoney(userMoneyLog.getUseMoney().longValue());
       //判断余额操作行为
       //【付款操作】
       if (userMoneyLog.getMoneyLogType().equals(ShopCode.SHOP_USER_MONEY_PAID.getCode())) {
        
               //订单已经付款，则抛异常
               if (count > 0) {
        
                    CastException.cast(ShopCode.SHOP_ORDER_PAY_STATUS_IS_PAY);
                }
           	   //用户账户扣减余额
               userMapper.reduceUserMoney(tradeUser);
           }
        //【退款操作】
        if (userMoneyLog.getMoneyLogType().equals(ShopCode.SHOP_USER_MONEY_REFUND.getCode())) {
        
             //如果订单未付款,则不能退款,抛异常
             if (count == 0) {
        
             CastException.cast(ShopCode.SHOP_ORDER_PAY_STATUS_NO_PAY);
         }
         //防止多次退款
         userMoneyLogExample = new TradeUserMoneyLogExample();
         userMoneyLogExample.createCriteria()
                 .andUserIdEqualTo(userMoneyLog.getUserId())
                    .andOrderIdEqualTo(userMoneyLog.getOrderId())
                    .andMoneyLogTypeEqualTo(ShopCode.SHOP_USER_MONEY_REFUND.getCode());
         count = userMoneyLogMapper.countByExample(userMoneyLogExample);
         if (count > 0) {
        
             CastException.cast(ShopCode.SHOP_USER_MONEY_REFUND_ALREADY);
         }
         	//用户账户添加余额
            userMapper.addUserMoney(tradeUser);
        }
    
    
        //记录用户使用余额日志
        userMoneyLog.setCreateTime(new Date());
        userMoneyLogMapper.insert(userMoneyLog);
        return new Result(ShopCode.SHOP_SUCCESS.getSuccess(),ShopCode.SHOP_SUCCESS.getMessage());
    }

\#\#\#8）确认订单

private void updateOrderStatus(TradeOrder order) {
        
        order.setOrderStatus(ShopCode.SHOP_ORDER_CONFIRM.getCode());
        order.setPayStatus(ShopCode.SHOP_ORDER_PAY_STATUS_NO_PAY.getCode());
        order.setConfirmTime(new Date());
        int r = orderMapper.updateByPrimaryKey(order);
        if (r <= 0) {
        
            CastException.cast(ShopCode.SHOP_ORDER_CONFIRM_FAIL);
        }
        log.info("订单:["+order.getOrderId()+"]状态修改成功");
    }

#### 9）小结 ####

@Override
    public Result confirmOrder(TradeOrder order) {
        
        //1.校验订单
        checkOrder(order);
        //2.生成预订单
        Long orderId = savePreOrder(order);
        order.setOrderId(orderId);
        try {
        
            //3.扣减库存
            reduceGoodsNum(order);
            //4.扣减优惠券
            changeCoponStatus(order);
            //5.使用余额
            reduceMoneyPaid(order);
            //6.确认订单
            updateOrderStatus(order);
            log.info("订单:["+orderId+"]确认成功");
            return new Result(ShopCode.SHOP_SUCCESS.getSuccess(), ShopCode.SHOP_SUCCESS.getMessage());
        } catch (Exception e) {
        
            //确认订单失败,发送消息
            ...
            return new Result(ShopCode.SHOP_FAIL.getSuccess(), ShopCode.SHOP_FAIL.getMessage());
        }
    }

### 4.2 失败补偿机制 ###

#### 4.2.1 消息发送方 ####

*  配置RocketMQ属性值

rocketmq.name-server=192.168.25.135:9876;192.168.25.138:9876
    rocketmq.producer.group=orderProducerGroup
    
    mq.order.consumer.group.name=order_orderTopic_cancel_group
    mq.order.topic=orderTopic
    mq.order.tag.confirm=order_confirm
    mq.order.tag.cancel=order_cancel

*  注入模板类和属性值信息

@Autowired
     private RocketMQTemplate rocketMQTemplate;
    
     @Value("${mq.order.topic}")
     private String topic;
    
     @Value("${mq.order.tag.cancel}")
     private String cancelTag;

*  发送下单失败消息

@Override
    public Result confirmOrder(TradeOrder order) {
        
        //1.校验订单
        //2.生成预订
        try {
        
            //3.扣减库存
            //4.扣减优惠券
            //5.使用余额
            //6.确认订单
        } catch (Exception e) {
        
            //确认订单失败,发送消息
            CancelOrderMQ cancelOrderMQ = new CancelOrderMQ();
            cancelOrderMQ.setOrderId(order.getOrderId());
            cancelOrderMQ.setCouponId(order.getCouponId());
            cancelOrderMQ.setGoodsId(order.getGoodsId());
            cancelOrderMQ.setGoodsNumber(order.getGoodsNumber());
            cancelOrderMQ.setUserId(order.getUserId());
            cancelOrderMQ.setUserMoney(order.getMoneyPaid());
            try {
        
                sendMessage(topic, 
                            cancelTag, 
                            cancelOrderMQ.getOrderId().toString(), 
                        JSON.toJSONString(cancelOrderMQ));
        } catch (Exception e1) {
        
            e1.printStackTrace();
                CastException.cast(ShopCode.SHOP_MQ_SEND_MESSAGE_FAIL);
            }
            return new Result(ShopCode.SHOP_FAIL.getSuccess(), ShopCode.SHOP_FAIL.getMessage());
        }
    }

private void sendMessage(String topic, String tags, String keys, String body) throws Exception {
        
        //判断Topic是否为空
        if (StringUtils.isEmpty(topic)) {
        
            CastException.cast(ShopCode.SHOP_MQ_TOPIC_IS_EMPTY);
        }
        //判断消息内容是否为空
        if (StringUtils.isEmpty(body)) {
        
            CastException.cast(ShopCode.SHOP_MQ_MESSAGE_BODY_IS_EMPTY);
        }
        //消息体
        Message message = new Message(topic, tags, keys, body.getBytes());
        //发送消息
        rocketMQTemplate.getProducer().send(message);
    }

#### 4.2.2 消费接收方 ####

*  配置RocketMQ属性值

rocketmq.name-server=192.168.25.135:9876;192.168.25.138:9876
    mq.order.consumer.group.name=order_orderTopic_cancel_group
    mq.order.topic=orderTopic

*  创建监听类，消费消息

@Slf4j
    @Component
    @RocketMQMessageListener(topic = "${mq.order.topic}", 
                             consumerGroup = "${mq.order.consumer.group.name}",
                             messageModel = MessageModel.BROADCASTING)
    public class CancelOrderConsumer implements RocketMQListener<MessageExt>{
        
    
        @Override
        public void onMessage(MessageExt messageExt) {
        
            ...
        }
    }

##### 1）回退库存 #####

*  流程分析

![ccf556a9ac252e2d5b3ddc2482c70f14.png][]

*  消息消费者

@Slf4j
    @Component
    @RocketMQMessageListener(topic = "${mq.order.topic}",consumerGroup = "${mq.order.consumer.group.name}",messageModel = MessageModel.BROADCASTING )
    public class CancelMQListener implements RocketMQListener<MessageExt>{
        
    
    
        @Value("${mq.order.consumer.group.name}")
        private String groupName;
    
        @Autowired
        private TradeGoodsMapper goodsMapper;
    
        @Autowired
        private TradeMqConsumerLogMapper mqConsumerLogMapper;
    
        @Autowired
        private TradeGoodsNumberLogMapper goodsNumberLogMapper;
    
        @Override
        public void onMessage(MessageExt messageExt) {
        
            String msgId=null;
            String tags=null;
            String keys=null;
            String body=null;
            try {
        
                //1. 解析消息内容
                msgId = messageExt.getMsgId();
                tags= messageExt.getTags();
                keys= messageExt.getKeys();
                body= new String(messageExt.getBody(),"UTF-8");
    
                log.info("接受消息成功");
    
                //2. 查询消息消费记录
                TradeMqConsumerLogKey primaryKey = new TradeMqConsumerLogKey();
                primaryKey.setMsgTag(tags);
                primaryKey.setMsgKey(keys);
                primaryKey.setGroupName(groupName);
                TradeMqConsumerLog mqConsumerLog = mqConsumerLogMapper.selectByPrimaryKey(primaryKey);
    
                if(mqConsumerLog!=null){
        
                    //3. 判断如果消费过...
                    //3.1 获得消息处理状态
                    Integer status = mqConsumerLog.getConsumerStatus();
                    //处理过...返回
                    if(ShopCode.SHOP_MQ_MESSAGE_STATUS_SUCCESS.getCode().intValue()==status.intValue()){
        
                        log.info("消息:"+msgId+",已经处理过");
                        return;
                    }
    
                    //正在处理...返回
                    if(ShopCode.SHOP_MQ_MESSAGE_STATUS_PROCESSING.getCode().intValue()==status.intValue()){
        
                        log.info("消息:"+msgId+",正在处理");
                        return;
                    }
    
                    //处理失败
                    if(ShopCode.SHOP_MQ_MESSAGE_STATUS_FAIL.getCode().intValue()==status.intValue()){
        
                        //获得消息处理次数
                        Integer times = mqConsumerLog.getConsumerTimes();
                        if(times>3){
        
                            log.info("消息:"+msgId+",消息处理超过3次,不能再进行处理了");
                            return;
                        }
                        mqConsumerLog.setConsumerStatus(ShopCode.SHOP_MQ_MESSAGE_STATUS_PROCESSING.getCode());
    
                        //使用数据库乐观锁更新
                        TradeMqConsumerLogExample example = new TradeMqConsumerLogExample();
                        TradeMqConsumerLogExample.Criteria criteria = example.createCriteria();
                        criteria.andMsgTagEqualTo(mqConsumerLog.getMsgTag());
                        criteria.andMsgKeyEqualTo(mqConsumerLog.getMsgKey());
                        criteria.andGroupNameEqualTo(groupName);
                        criteria.andConsumerTimesEqualTo(mqConsumerLog.getConsumerTimes());
                        int r = mqConsumerLogMapper.updateByExampleSelective(mqConsumerLog, example);
                        if(r<=0){
        
                            //未修改成功,其他线程并发修改
                            log.info("并发修改,稍后处理");
                        }
                    }
    
                }else{
        
                    //4. 判断如果没有消费过...
                    mqConsumerLog = new TradeMqConsumerLog();
                    mqConsumerLog.setMsgTag(tags);
                    mqConsumerLog.setMsgKey(keys);
                    mqConsumerLog.setConsumerStatus(ShopCode.SHOP_MQ_MESSAGE_STATUS_PROCESSING.getCode());
                    mqConsumerLog.setMsgBody(body);
                    mqConsumerLog.setMsgId(msgId);
                    mqConsumerLog.setConsumerTimes(0);
    
                    //将消息处理信息添加到数据库
                    mqConsumerLogMapper.insert(mqConsumerLog);
                }
                //5. 回退库存
                MQEntity mqEntity = JSON.parseObject(body, MQEntity.class);
                Long goodsId = mqEntity.getGoodsId();
                TradeGoods goods = goodsMapper.selectByPrimaryKey(goodsId);
                goods.setGoodsNumber(goods.getGoodsNumber()+mqEntity.getGoodsNum());
                goodsMapper.updateByPrimaryKey(goods);
    
                //记录库存操作日志
                TradeGoodsNumberLog goodsNumberLog = new TradeGoodsNumberLog();
                goodsNumberLog.setOrderId(mqEntity.getOrderId());
                goodsNumberLog.setGoodsId(goodsId);
                goodsNumberLog.setGoodsNumber(mqEntity.getGoodsNum());
                goodsNumberLog.setLogTime(new Date());
                goodsNumberLogMapper.insert(goodsNumberLog);
    
                //6. 将消息的处理状态改为成功
                mqConsumerLog.setConsumerStatus(ShopCode.SHOP_MQ_MESSAGE_STATUS_SUCCESS.getCode());
                mqConsumerLog.setConsumerTimestamp(new Date());
                mqConsumerLogMapper.updateByPrimaryKey(mqConsumerLog);
                log.info("回退库存成功");
            } catch (Exception e) {
        
                e.printStackTrace();
                TradeMqConsumerLogKey primaryKey = new TradeMqConsumerLogKey();
                primaryKey.setMsgTag(tags);
                primaryKey.setMsgKey(keys);
                primaryKey.setGroupName(groupName);
                TradeMqConsumerLog mqConsumerLog = mqConsumerLogMapper.selectByPrimaryKey(primaryKey);
                if(mqConsumerLog==null){
        
                    //数据库未有记录
                    mqConsumerLog = new TradeMqConsumerLog();
                    mqConsumerLog.setMsgTag(tags);
                    mqConsumerLog.setMsgKey(keys);
                    mqConsumerLog.setConsumerStatus(ShopCode.SHOP_MQ_MESSAGE_STATUS_FAIL.getCode());
                    mqConsumerLog.setMsgBody(body);
                    mqConsumerLog.setMsgId(msgId);
                    mqConsumerLog.setConsumerTimes(1);
                    mqConsumerLogMapper.insert(mqConsumerLog);
                }else{
        
                    mqConsumerLog.setConsumerTimes(mqConsumerLog.getConsumerTimes()+1);
                    mqConsumerLogMapper.updateByPrimaryKeySelective(mqConsumerLog);
                }
            }
    
        }
    }

##### 2）回退优惠券 #####

##### 3）回退余额 #####

##### 4）取消订单 #####

@Override
        public void onMessage(MessageExt messageExt) {
        
            String body = new String(messageExt.getBody(), "UTF-8");
            String msgId = messageExt.getMsgId();
            String tags = messageExt.getTags();
            String keys = messageExt.getKeys();
            log.info("CancelOrderProcessor receive message:"+messageExt);
            CancelOrderMQ cancelOrderMQ = JSON.parseObject(body, CancelOrderMQ.class);
            TradeOrder order = orderService.findOne(cancelOrderMQ.getOrderId());
    		order.setOrderStatus(ShopCode.SHOP_ORDER_CANCEL.getCode());
            orderService.changeOrderStatus(order);
            log.info("订单:["+order.getOrderId()+"]状态设置为取消");
            return order;
        }

### 4.3 测试 ###

#### 1）准备测试环境 ####

@RunWith(SpringRunner.class)
    @SpringBootTest(classes = ShopOrderServiceApplication.class)
    public class OrderTest {
        
    
        @Autowired
        private IOrderService orderService;
    }

\#\#\#1）准备测试数据

*  用户数据
 *  商品数据
 *  优惠券数据

\#\#\#2）测试下单成功流程

@Test    
    public void add(){
        
        Long goodsId=XXXL;
        Long userId=XXXL;
        Long couponId=XXXL;
    
        TradeOrder order = new TradeOrder();
        order.setGoodsId(goodsId);
        order.setUserId(userId);
        order.setGoodsNumber(1);
        order.setAddress("北京");
        order.setGoodsPrice(new BigDecimal("5000"));
        order.setOrderAmount(new BigDecimal("5000"));
        order.setMoneyPaid(new BigDecimal("100"));
        order.setCouponId(couponId);
        order.setShippingFee(new BigDecimal(0));
        orderService.confirmOrder(order);
    }

执行完毕后,查看数据库中用户的余额、优惠券数据，及订单的状态数据

\#\#\#3）测试下单失败流程

代码同上。

执行完毕后，查看用户的余额、优惠券数据是否发生更改，订单的状态是否为取消。

## 5. 支付业务 ##

### 5.1 创建支付订单 ###

![d99b41580ac9eae3d5acabd5047fdf59.png][]

public Result createPayment(TradePay tradePay) {
        
        //查询订单支付状态
        try {
        
            TradePayExample payExample = new TradePayExample();
            TradePayExample.Criteria criteria = payExample.createCriteria();
            criteria.andOrderIdEqualTo(tradePay.getOrderId());
            criteria.andIsPaidEqualTo(ShopCode.SHOP_ORDER_PAY_STATUS_IS_PAY.getCode());
            int count = tradePayMapper.countByExample(payExample);
            if (count > 0) {
        
                CastException.cast(ShopCode.SHOP_ORDER_PAY_STATUS_IS_PAY);
            }
    
            long payId = idWorker.nextId();
            tradePay.setPayId(payId);
            tradePay.setIsPaid(ShopCode.SHOP_ORDER_PAY_STATUS_NO_PAY.getCode());
            tradePayMapper.insert(tradePay);
            log.info("创建支付订单成功:" + payId);
        } catch (Exception e) {
        
            return new Result(ShopCode.SHOP_FAIL.getSuccess(), ShopCode.SHOP_FAIL.getMessage());
        }
        return new Result(ShopCode.SHOP_SUCCESS.getSuccess(), ShopCode.SHOP_SUCCESS.getMessage());
    }

### 5.2 支付回调 ###

#### 5.2.1 流程分析 ####

![9e622850203f90346659216f79661dc4.png][]

#### 5.2.2 代码实现 ####

public Result callbackPayment(TradePay tradePay) {
        
    
        if (tradePay.getIsPaid().equals(ShopCode.SHOP_ORDER_PAY_STATUS_IS_PAY.getCode())) {
        
            tradePay = tradePayMapper.selectByPrimaryKey(tradePay.getPayId());
            if (tradePay == null) {
        
                CastException.cast(ShopCode.SHOP_PAYMENT_NOT_FOUND);
            }
            tradePay.setIsPaid(ShopCode.SHOP_ORDER_PAY_STATUS_IS_PAY.getCode());
            int i = tradePayMapper.updateByPrimaryKeySelective(tradePay);
            //更新成功代表支付成功
            if (i == 1) {
        
                TradeMqProducerTemp mqProducerTemp = new TradeMqProducerTemp();
                mqProducerTemp.setId(String.valueOf(idWorker.nextId()));
                mqProducerTemp.setGroupName("payProducerGroup");
                mqProducerTemp.setMsgKey(String.valueOf(tradePay.getPayId()));
                mqProducerTemp.setMsgTag(topic);
                mqProducerTemp.setMsgBody(JSON.toJSONString(tradePay));
                mqProducerTemp.setCreateTime(new Date());
                mqProducerTempMapper.insert(mqProducerTemp);
                TradePay finalTradePay = tradePay;
                executorService.submit(new Runnable() {
        
                    @Override
                    public void run() {
        
                        try {
        
                            SendResult sendResult = sendMessage(topic, 
                                                                tag, 
                                                                finalTradePay.getPayId(), 
                                                                JSON.toJSONString(finalTradePay));
                            log.info(JSON.toJSONString(sendResult));
                            if (SendStatus.SEND_OK.equals(sendResult.getSendStatus())) {
        
                                mqProducerTempMapper.deleteByPrimaryKey(mqProducerTemp.getId());
                                System.out.println("删除消息表成功");
                            }
                        } catch (Exception e) {
        
                            e.printStackTrace();
                        }
                    }
                });
            } else {
        
                CastException.cast(ShopCode.SHOP_PAYMENT_IS_PAID);
            }
        }
        return new Result(ShopCode.SHOP_SUCCESS.getSuccess(), ShopCode.SHOP_SUCCESS.getMessage());
    }

##### 线程池优化消息发送逻辑 #####

*  创建线程池对象

@Bean
    public ThreadPoolTaskExecutor getThreadPool() {
        
    
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    
        executor.setCorePoolSize(4);
    
        executor.setMaxPoolSize(8);
    
        executor.setQueueCapacity(100);
    
        executor.setKeepAliveSeconds(60);
    
        executor.setThreadNamePrefix("Pool-A");
    
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
    
        executor.initialize();
    
        return executor;
    
    }

*  使用线程池

@Autowired
    private ThreadPoolTaskExecutor executorService;
    
    executorService.submit(new Runnable() {
        
        @Override
        public void run() {
        
            try {
        
                SendResult sendResult = sendMessage(topic, tag, finalTradePay.getPayId(), JSON.toJSONString(finalTradePay));
                log.info(JSON.toJSONString(sendResult));
                if (SendStatus.SEND_OK.equals(sendResult.getSendStatus())) {
        
                    mqProducerTempMapper.deleteByPrimaryKey(mqProducerTemp.getId());
                    System.out.println("删除消息表成功");
                }
            } catch (Exception e) {
        
                e.printStackTrace();
            }
        }
    });

#### 5.2.3 ####

#### 处理消息 ####

支付成功后，支付服务payService发送MQ消息，订单服务、用户服务、日志服务需要订阅消息进行处理

1.  订单服务修改订单状态为已支付
2.  日志服务记录支付日志
3.  用户服务负责给用户增加积分

以下用订单服务为例说明消息的处理情况

##### 1）配置RocketMQ属性值 #####

mq.pay.topic=payTopic
    mq.pay.consumer.group.name=pay_payTopic_group

##### 2）消费消息 #####

*  在订单服务中，配置公共的消息处理类

public class BaseConsumer {
        
    
        public TradeOrder handleMessage(IOrderService 
                                        orderService, 
                                        MessageExt messageExt,Integer code) throws Exception {
        
            //解析消息内容
            String body = new String(messageExt.getBody(), "UTF-8");
            String msgId = messageExt.getMsgId();
            String tags = messageExt.getTags();
            String keys = messageExt.getKeys();
            OrderMQ orderMq = JSON.parseObject(body, OrderMQ.class);
            
            //查询
            TradeOrder order = orderService.findOne(orderMq.getOrderId());
    
            if(ShopCode.SHOP_ORDER_MESSAGE_STATUS_CANCEL.getCode().equals(code)){
        
                order.setOrderStatus(ShopCode.SHOP_ORDER_CANCEL.getCode());
            }
    
            if(ShopCode.SHOP_ORDER_MESSAGE_STATUS_ISPAID.getCode().equals(code)){
        
                order.setPayStatus(ShopCode.SHOP_ORDER_PAY_STATUS_IS_PAY.getCode());
            }
            orderService.changeOrderStatus(order);
            return order;
        }
    
    }

*  接受订单支付成功消息

@Slf4j
    @Component
    @RocketMQMessageListener(topic = "${mq.pay.topic}", 
                             consumerGroup = "${mq.pay.consumer.group.name}")
    public class PayConsumer extends BaseConsumer implements RocketMQListener<MessageExt> {
        
    
        @Autowired
        private IOrderService orderService;
    
        @Override
        public void onMessage(MessageExt messageExt) {
        
            try {
        
                log.info("CancelOrderProcessor receive message:"+messageExt);
                TradeOrder order = handleMessage(orderService, 
                                                 messageExt, 
                                                 ShopCode.SHOP_ORDER_MESSAGE_STATUS_ISPAID.getCode());
                log.info("订单:["+order.getOrderId()+"]支付成功");
            } catch (Exception e) {
        
                e.printStackTrace();
                log.error("订单支付失败");
            }
        }
    }

## 6. 整体联调 ##

通过Rest客户端请求shop-order-web和shop-pay-web完成下单和支付操作

### 6.1 准备工作 ###

#### 1）配置RestTemplate类 ####

@Configuration
    public class RestTemplateConfig {
        
    
        @Bean
        @ConditionalOnMissingBean({
         RestOperations.class, RestTemplate.class })
        public RestTemplate restTemplate(ClientHttpRequestFactory factory) {
        
    
            RestTemplate restTemplate = new RestTemplate(factory);
    
            // 使用 utf-8 编码集的 conver 替换默认的 conver（默认的 string conver 的编码集为"ISO-8859-1"）
            List<HttpMessageConverter<?>> messageConverters = restTemplate.getMessageConverters();
            Iterator<HttpMessageConverter<?>> iterator = messageConverters.iterator();
            while (iterator.hasNext()) {
        
                HttpMessageConverter<?> converter = iterator.next();
                if (converter instanceof StringHttpMessageConverter) {
        
                    iterator.remove();
                }
            }
            messageConverters.add(new StringHttpMessageConverter(Charset.forName("UTF-8")));
    
            return restTemplate;
        }
    
        @Bean
        @ConditionalOnMissingBean({
        ClientHttpRequestFactory.class})
        public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
        
            SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
            // ms
            factory.setReadTimeout(15000);
            // ms
            factory.setConnectTimeout(15000);
            return factory;
        }
    }

#### 2）配置请求地址 ####

*  订单系统

server.host=http://localhost
    server.servlet.path=/order-web
    server.port=8080
    shop.order.baseURI=${server.host}:${server.port}${server.servlet.path}
    shop.order.confirm=/order/confirm

*  支付系统

server.host=http://localhost
    server.servlet.path=/pay-web
    server.port=9090
    shop.pay.baseURI=${server.host}:${server.port}${server.servlet.path}
    shop.pay.createPayment=/pay/createPayment
    shop.pay.callbackPayment=/pay/callbackPayment

### 6.2 下单测试 ###

@RunWith(SpringRunner.class)
    @ContextConfiguration(classes = ShopOrderWebApplication.class)
    @TestPropertySource("classpath:application.properties")
    public class OrderTest {
        
    
       @Autowired
       private RestTemplate restTemplate;
    
       @Value("${shop.order.baseURI}")
       private String baseURI;
    
       @Value("${shop.order.confirm}")
       private String confirmOrderPath;
    
       @Autowired
       private IDWorker idWorker;
      
      /**
        * 下单
        */
       @Test
       public void confirmOrder(){
        
           Long goodsId=XXXL;
           Long userId=XXXL;
           Long couponId=XXXL;
    
           TradeOrder order = new TradeOrder();
           order.setGoodsId(goodsId);
           order.setUserId(userId);
           order.setGoodsNumber(1);
           order.setAddress("北京");
           order.setGoodsPrice(new BigDecimal("5000"));
           order.setOrderAmount(new BigDecimal("5000"));
           order.setMoneyPaid(new BigDecimal("100"));
           order.setCouponId(couponId);
           order.setShippingFee(new BigDecimal(0));
    
           Result result = restTemplate.postForEntity(baseURI + confirmOrderPath, order, Result.class).getBody();
           System.out.println(result);
       }
    
    }

### 6.3 支付测试 ###

@RunWith(SpringRunner.class)
    @ContextConfiguration(classes = ShopPayWebApplication.class)
    @TestPropertySource("classpath:application.properties")
    public class PayTest {
        
    
        @Autowired
        private RestTemplate restTemplate;
    
        @Value("${shop.pay.baseURI}")
        private String baseURI;
    
        @Value("${shop.pay.createPayment}")
        private String createPaymentPath;
    
        @Value("${shop.pay.callbackPayment}")
        private String callbackPaymentPath;
    
        @Autowired
        private IDWorker idWorker;
    
       /**
         * 创建支付订单
         */
        @Test
        public void createPayment(){
        
    
            Long orderId = 346321587315814400L;
            TradePay pay = new TradePay();
            pay.setOrderId(orderId);
            pay.setPayAmount(new BigDecimal(4800));
    
            Result result = restTemplate.postForEntity(baseURI + createPaymentPath, pay, Result.class).getBody();
            System.out.println(result);
        }
       
        /**
         * 支付回调
         */
        @Test
        public void callbackPayment(){
        
            Long payId = 346321891507720192L;
            TradePay pay = new TradePay();
            pay.setPayId(payId);
            pay.setIsPaid(ShopCode.SHOP_ORDER_PAY_STATUS_IS_PAY.getCode());
            Result result = restTemplate.postForEntity(baseURI + callbackPaymentPath, pay, Result.class).getBody();
            System.out.println(result);
    
        }
    
    }

odsNumber(1);  
order.setAddress(“北京”);  
order.setGoodsPrice(new BigDecimal(“5000”));  
order.setOrderAmount(new BigDecimal(“5000”));  
order.setMoneyPaid(new BigDecimal(“100”));  
order.setCouponId(couponId);  
order.setShippingFee(new BigDecimal(0));

Result result = restTemplate.postForEntity(baseURI + confirmOrderPath, order, Result.class).getBody();
        System.out.println(result);
    }

## 6.3 支付测试
    
    ```java
    @RunWith(SpringRunner.class)
    @ContextConfiguration(classes = ShopPayWebApplication.class)
    @TestPropertySource("classpath:application.properties")
    public class PayTest {
    
       @Autowired
       private RestTemplate restTemplate;
    
       @Value("${shop.pay.baseURI}")
       private String baseURI;
    
       @Value("${shop.pay.createPayment}")
       private String createPaymentPath;
    
       @Value("${shop.pay.callbackPayment}")
       private String callbackPaymentPath;
    
       @Autowired
       private IDWorker idWorker;
    
      /**
        * 创建支付订单
        */
       @Test
       public void createPayment(){
    
           Long orderId = 346321587315814400L;
           TradePay pay = new TradePay();
           pay.setOrderId(orderId);
           pay.setPayAmount(new BigDecimal(4800));
    
           Result result = restTemplate.postForEntity(baseURI + createPaymentPath, pay, Result.class).getBody();
           System.out.println(result);
       }
      
       /**
        * 支付回调
        */
       @Test
       public void callbackPayment(){
           Long payId = 346321891507720192L;
           TradePay pay = new TradePay();
           pay.setPayId(payId);
           pay.setIsPaid(ShopCode.SHOP_ORDER_PAY_STATUS_IS_PAY.getCode());
           Result result = restTemplate.postForEntity(baseURI + callbackPaymentPath, pay, Result.class).getBody();
           System.out.println(result);
    
       }
    
    }

[463239a9fe35bed27d4f510bff8b4ebf.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/02/c91b0dfbaeac471c922ce3cd5455c2f8.png
[7cbc4a8613d369260071596af043d666.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/02/26daca1abeff426194d8985d97b45da8.png
[1e2707ce106925811abaadee5a91f177.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/02/61e99544ab6b4da8a07ff754828ef579.png
[20230724024159.png_origin_url_https_3A_2F_2Fgitee.com_2FHoneyAndSherry_2Fpicture_2Fraw_2Fmaster_2FRocketMQ.assets_2F_E4_B8_8B_E5_8D_95_E6_97_B6_E5_BA_8F_E5_9B_BE_282_pos_id_img-Hpn09Ohg-1695104433311_29.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/02/9ead23fe05a34b2a90591ae313ddde3a.png
[1c6052569db98af743cf7efca2c41cef.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/02/a9510a1a5aa04af0b4d94921b5c33fd3.png
[ac7d288f015bcca4983046d9336a25ac.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/02/784534c0604442238cc4a93e3a787f7c.png
[3df9bddc8ceb56b034902c5db1940a43.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/02/fa835f84dad84422bcb81ba346c2b1b2.png
[rocketmq-spring]: https://github.com/apache/rocketmq-spring.git
[dubbo-spring-boot-starter]: https://github.com/alibaba/dubbo-spring-boot-starter.git
[c8f599ea747d454289afc10f22ed806c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/02/8c4a3573236b4fb680d305266cbf48b9.png
[acc738ae290e40858105ca44a1502865.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/02/b4c8198f947d40b1b1567aad3ab6a122.png
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