优化支付通知的逻辑，解决并发的问题。

同时，收到支付结果时，立马回调业务，避免延迟

yudao-admin-server/src/main/java/cn/iocoder/yudao/adminserver/modules/pay/job/notify/PayNotifyJob.java

@@ -0,0 +1,29 @@
+package cn.iocoder.yudao.adminserver.modules.pay.job.notify;
+
+import cn.iocoder.yudao.coreservice.modules.pay.service.notify.PayNotifyCoreService;
+import cn.iocoder.yudao.framework.quartz.core.handler.JobHandler;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+
+import javax.annotation.Resource;
+
+/**
+ * 支付通知 Job
+ * 通过不断扫描待通知的 PayNotifyTaskDO 记录，回调业务线的回调接口
+ *
+ * @author 芋道源码
+ */
+@Component
+@Slf4j
+public class PayNotifyJob implements JobHandler {
+
+    @Resource
+    private PayNotifyCoreService payNotifyCoreService;
+
+    @Override
+    public String execute(String param) throws Exception {
+        int notifyCount = payNotifyCoreService.executeNotify();
+        return String.format("执行支付通知 %s 个", notifyCount);
+    }
+
+}

yudao-admin-server/src/main/java/cn/iocoder/yudao/adminserver/modules/pay/job/package-info.java

@@ -0,0 +1 @@
+package cn.iocoder.yudao.adminserver.modules.pay.job;

yudao-admin-server/src/main/java/cn/iocoder/yudao/adminserver/modules/system/enums/SysErrorCodeConstants.java

@@ -1,7 +1,6 @@
 package cn.iocoder.yudao.adminserver.modules.system.enums;
 
 import cn.iocoder.yudao.framework.common.exception.ErrorCode;
-import javafx.beans.binding.MapExpression;
 
 /**
  * System 错误码枚举类

yudao-admin-server/src/main/resources/application-local.yaml

@@ -166,6 +166,9 @@ yudao:
     exclude-urls: # 如下两个 url，仅仅是为了演示，去掉配置也没关系
       - ${spring.boot.admin.context-path}/** # 不处理 Spring Boot Admin 的请求
       - ${management.endpoints.web.base-path}/** # 不处理 Actuator 的请求
+  pay:
+    pay-notify-url: http://niubi.natapp1.cc/api/pay/order/notify
+    refund-notify-url: http://niubi.natapp1.cc/api/pay/refund/notify
   demo: false # 关闭演示模式
 
 justauth:

yudao-core-service/pom.xml

@@ -77,6 +77,12 @@
             <artifactId>yudao-spring-boot-starter-mq</artifactId>
         </dependency>
 
+        <!-- 服务保障相关 -->
+        <dependency>
+            <groupId>cn.iocoder.boot</groupId>
+            <artifactId>yudao-spring-boot-starter-protection</artifactId>
+        </dependency>
+
         <!-- Test 测试相关 -->
         <dependency>
             <groupId>cn.iocoder.boot</groupId>

yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/dal/dataobject/notify/PayNotifyLogDO.java

@@ -34,15 +34,11 @@ public class PayNotifyLogDO extends BaseDO {
      */
     private Integer notifyTimes;
     /**
-     * 请求参数
-     */
-    private String request;
-    /**
-     * 响应结果
+     * HTTP 响应结果
      */
     private String response;
     /**
-     * 状态
+     * 支付通知状态
      *
      * 外键 {@link PayNotifyStatusEnum}
      */

yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/dal/mysql/notify/PayNotifyTaskCoreMapper.java

@@ -1,10 +1,30 @@
 package cn.iocoder.yudao.coreservice.modules.pay.dal.mysql.notify;
 
-import cn.iocoder.yudao.coreservice.modules.pay.dal.dataobject.merchant.PayAppDO;
 import cn.iocoder.yudao.coreservice.modules.pay.dal.dataobject.notify.PayNotifyTaskDO;
+import cn.iocoder.yudao.coreservice.modules.pay.enums.notify.PayNotifyStatusEnum;
 import cn.iocoder.yudao.framework.mybatis.core.mapper.BaseMapperX;
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import org.apache.ibatis.annotations.Mapper;
 
+import java.util.Date;
+import java.util.List;
+
 @Mapper
 public interface PayNotifyTaskCoreMapper extends BaseMapperX<PayNotifyTaskDO> {
+
+    /**
+     * 获得需要通知的 PayNotifyTaskDO 记录。需要满足如下条件：
+     *
+     * 1. status 非成功
+     * 2. nextNotifyTime 小于当前时间
+     *
+     * @return PayTransactionNotifyTaskDO 数组
+     */
+    default List<PayNotifyTaskDO> selectListByNotify() {
+        return selectList(new QueryWrapper<PayNotifyTaskDO>()
+                .in("status", PayNotifyStatusEnum.WAITING.getStatus(), PayNotifyStatusEnum.REQUEST_SUCCESS.getStatus(),
+                        PayNotifyStatusEnum.REQUEST_FAILURE.getStatus())
+                .le("next_notify_time", new Date()));
+    }
+
 }

yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/dal/redis/PayRedisKeyCoreConstants.java

@@ -0,0 +1,19 @@
+package cn.iocoder.yudao.coreservice.modules.pay.dal.redis;
+
+import cn.iocoder.yudao.framework.redis.core.RedisKeyDefine;
+import org.redisson.api.RLock;
+
+import static cn.iocoder.yudao.framework.redis.core.RedisKeyDefine.KeyTypeEnum.HASH;
+
+/**
+ * Lock4j Redis Key 枚举类
+ *
+ * @author 芋道源码
+ */
+public interface PayRedisKeyCoreConstants {
+
+    RedisKeyDefine PAY_NOTIFY_LOCK = new RedisKeyDefine("通知任务的分布式锁",
+            "pay_notify:lock:", // 参数来自 DefaultLockKeyBuilder 类
+            HASH, RLock.class, RedisKeyDefine.TimeoutTypeEnum.DYNAMIC); // Redisson 的 Lock 锁，使用 Hash 数据结构
+
+}

yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/dal/redis/notify/PayNotifyLockCoreRedisDAO.java

@@ -0,0 +1,39 @@
+package cn.iocoder.yudao.coreservice.modules.pay.dal.redis.notify;
+
+import org.redisson.api.RLock;
+import org.redisson.api.RedissonClient;
+import org.springframework.stereotype.Repository;
+
+import javax.annotation.Resource;
+import java.util.concurrent.TimeUnit;
+
+import static cn.iocoder.yudao.coreservice.modules.pay.dal.redis.PayRedisKeyCoreConstants.PAY_NOTIFY_LOCK;
+
+/**
+ * 支付通知的锁 Redis DAO
+ *
+ * @author 芋道源码
+ */
+@Repository
+public class PayNotifyLockCoreRedisDAO {
+
+    @Resource
+    private RedissonClient redissonClient;
+
+    public void lock(Long id, Long timeoutMillis, Runnable runnable) {
+        String lockKey = formatKey(id);
+        RLock lock = redissonClient.getLock(lockKey);
+        try {
+            lock.lock(timeoutMillis, TimeUnit.MILLISECONDS);
+            // 执行逻辑
+            runnable.run();
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    private static String formatKey(Long id) {
+        return String.format(PAY_NOTIFY_LOCK.getKeyTemplate(), id);
+    }
+
+}

yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/notify/PayNotifyCoreService.java

@@ -22,7 +22,8 @@ public interface PayNotifyCoreService {
      * 执行支付通知
      *
      * 注意，该方法提供给定时任务调用。目前是 yudao-admin-server 进行调用
+     * @return 通知数量
      */
-    void executeNotify();
+    int executeNotify() throws InterruptedException;
 
 }

yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/notify/impl/PayNotifyCoreServiceImpl.java

@@ -1,22 +1,38 @@
 package cn.iocoder.yudao.coreservice.modules.pay.service.notify.impl;
 
+import cn.hutool.core.collection.CollUtil;
+import cn.hutool.http.HttpUtil;
 import cn.iocoder.yudao.coreservice.modules.pay.dal.dataobject.notify.PayNotifyTaskDO;
 import cn.iocoder.yudao.coreservice.modules.pay.dal.dataobject.order.PayOrderDO;
 import cn.iocoder.yudao.coreservice.modules.pay.dal.mysql.notify.PayNotifyTaskCoreMapper;
+import cn.iocoder.yudao.coreservice.modules.pay.dal.redis.notify.PayNotifyLockCoreRedisDAO;
 import cn.iocoder.yudao.coreservice.modules.pay.enums.notify.PayNotifyStatusEnum;
 import cn.iocoder.yudao.coreservice.modules.pay.enums.notify.PayNotifyTypeEnum;
 import cn.iocoder.yudao.coreservice.modules.pay.service.notify.PayNotifyCoreService;
 import cn.iocoder.yudao.coreservice.modules.pay.service.notify.dto.PayNotifyTaskCreateReqDTO;
+import cn.iocoder.yudao.coreservice.modules.pay.service.notify.vo.PayNotifyOrderReqVO;
+import cn.iocoder.yudao.coreservice.modules.pay.service.notify.vo.PayRefundOrderReqVO;
 import cn.iocoder.yudao.coreservice.modules.pay.service.order.PayOrderCoreService;
+import cn.iocoder.yudao.framework.common.pojo.CommonResult;
+import cn.iocoder.yudao.framework.common.util.date.DateUtils;
+import cn.iocoder.yudao.framework.common.util.json.JsonUtils;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.context.annotation.Lazy;
+import org.springframework.scheduling.annotation.Async;
 import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import javax.annotation.Resource;
 import javax.validation.Valid;
 import java.util.Date;
+import java.util.List;
 import java.util.Objects;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import static cn.iocoder.yudao.framework.common.util.date.DateUtils.SECOND_MILLIS;
+import static cn.iocoder.yudao.framework.common.util.json.JsonUtils.toJsonString;
 
 /**
  * 支付通知 Core Service 实现类
@@ -28,6 +44,15 @@ import java.util.Objects;
 @Slf4j
 public class PayNotifyCoreServiceImpl implements PayNotifyCoreService {
 
+    /**
+     * 通知超时时间，单位：秒
+     */
+    public static final int NOTIFY_TIMEOUT = 120;
+    /**
+     * {@link #NOTIFY_TIMEOUT} 的毫秒
+     */
+    public static final long NOTIFY_TIMEOUT_MILLIS = 120 * SECOND_MILLIS;
+
     @Resource
     @Lazy // 循环依赖，避免报错
     private PayOrderCoreService payOrderCoreService;
@@ -38,6 +63,13 @@ public class PayNotifyCoreServiceImpl implements PayNotifyCoreService {
     @Resource
     private ThreadPoolTaskExecutor threadPoolTaskExecutor; // TODO 芋艿：未来提供独立的线程池
 
+    @Resource
+    private PayNotifyLockCoreRedisDAO payNotifyLockCoreRedisDAO;
+
+    @Resource
+    @Lazy // 循环依赖（自己依赖自己），避免报错
+    private PayNotifyCoreServiceImpl self;
+
     @Override
     public void createPayNotifyTask(PayNotifyTaskCreateReqDTO reqDTO) {
         PayNotifyTaskDO task = new PayNotifyTaskDO();
@@ -56,11 +88,132 @@ public class PayNotifyCoreServiceImpl implements PayNotifyCoreService {
 
         // 执行插入
         payNotifyTaskCoreMapper.insert(task);
+
+        // 异步直接发起任务。虽然会有定时任务扫描，但是会导致延迟
+        self.executeNotifyAsync(task);
     }
 
     @Override
-    public void executeNotify() {
+    public int executeNotify() throws InterruptedException {
+        // 获得需要通知的任务
+        List<PayNotifyTaskDO> tasks = payNotifyTaskCoreMapper.selectListByNotify();
+        if (CollUtil.isEmpty(tasks)) {
+            return 0;
+        }
 
+        // 遍历，逐个通知
+        CountDownLatch latch = new CountDownLatch(tasks.size());
+        tasks.forEach(task -> threadPoolTaskExecutor.execute(() -> {
+            try {
+                executeNotify(task);
+            } finally {
+                latch.countDown();
+            }
+        }));
+        // 等待完成
+        this.awaitExecuteNotify(latch);
+        // 返回执行完成的任务数（成功 + 失败)
+        return tasks.size();
+    }
+
+    /**
+     * 等待全部支付通知的完成
+     * 每 1 秒会打印一次剩余任务数量
+     *
+     * @param latch Latch
+     * @throws InterruptedException 如果被打断
+     */
+    private void awaitExecuteNotify(CountDownLatch latch) throws InterruptedException {
+        long size = latch.getCount();
+        for (int i = 0; i < NOTIFY_TIMEOUT; i++) {
+            if (latch.await(1L, TimeUnit.SECONDS)) {
+                return;
+            }
+            log.info("[awaitExecuteNotify][任务处理中， 总任务数({}) 剩余任务数({})]", size, latch.getCount());
+        }
+        log.error("[awaitExecuteNotify][任务未处理完，总任务数({}) 剩余任务数({})]", size, latch.getCount());
+    }
+
+    /**
+     * 异步执行单个支付通知
+     *
+     * @param task 通知任务
+     */
+    @Async
+    public void executeNotifyAsync(PayNotifyTaskDO task) {
+        self.executeNotify(task); // 使用 self，避免事务不发起
+    }
+
+    /**
+     * 同步执行单个支付通知
+     *
+     * @param task 通知任务
+     */
+    public void executeNotify(PayNotifyTaskDO task) {
+        // 分布式锁，避免并发问题
+        payNotifyLockCoreRedisDAO.lock(task.getId(), NOTIFY_TIMEOUT_MILLIS, () -> {
+            // 校验，当前任务是否已经被通知过
+            // 虽然已经通过分布式加锁，但是可能同时满足通知的条件，然后都去获得锁。此时，第一个执行完后，第二个还是能拿到锁，然后会再执行一次。
+            PayNotifyTaskDO dbTask = payNotifyTaskCoreMapper.selectById(task.getId());
+            if (DateUtils.afterNow(dbTask.getNextNotifyTime())) {
+                log.info("[executeNotify][dbTask({}) 任务被忽略，原因是未到达下次通知时间，可能是因为并发执行了]", toJsonString(dbTask));
+                return;
+            }
+
+            // 执行通知
+            executeNotify0(dbTask);
+        });
+    }
+
+    @Transactional
+    public void executeNotify0(PayNotifyTaskDO task) {
+        // 发起回调
+        CommonResult<?> invokeResult = null;
+        Throwable invokeException = null;
+        try {
+            invokeResult = executeNotifyInvoke(task);
+        } catch (Throwable e) {
+            invokeException = e;
+        }
+
+        // 设置通用的更新 PayNotifyTaskDO 的字段
+        PayNotifyTaskDO updateTask = new PayNotifyTaskDO()
+                .setId(task.getId())
+                .setLastExecuteTime(new Date())
+                .setNotifyTimes(task.getNotifyTimes() + 1);
+
+        // 情况一：调用成功
+
+        // 情况二：调用失败
+
+        // 调用三：调用异常
+
+        // 记录 PayNotifyLog 日志
+    }
+
+    /**
+     * 执行单个支付任务的 HTTP 调用
+     *
+     * @param task 通知任务
+     * @return HTTP 响应
+     */
+    private CommonResult<?> executeNotifyInvoke(PayNotifyTaskDO task) {
+        // 拼接参数
+        Object request;
+        if (Objects.equals(task.getType(), PayNotifyTypeEnum.ORDER.getType())) {
+            request = PayNotifyOrderReqVO.builder().merchantOrderId(task.getMerchantOrderId())
+                            .payOrderId(task.getDataId()).build();
+        } else if (Objects.equals(task.getType(), PayNotifyTypeEnum.REFUND.getType())) {
+            request = PayRefundOrderReqVO.builder().merchantOrderId(task.getMerchantOrderId())
+                    .payRefundId(task.getDataId()).build();
+        } else {
+            throw new RuntimeException("未知的通知任务类型：" + toJsonString(task));
+        }
+        // 请求地址
+        String response = HttpUtil.post(task.getNotifyUrl(), toJsonString(request),
+                (int) NOTIFY_TIMEOUT_MILLIS);
+        // 解析结果
+        return JsonUtils.parseObject(response, CommonResult.class);
     }
 
 }

yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/notify/vo/PayNotifyOrderReqVO.java

@@ -0,0 +1,28 @@
+package cn.iocoder.yudao.coreservice.modules.pay.service.notify.vo;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.NotNull;
+
+@ApiModel(value = "支付单的通知 Request VO", description = "业务方接入支付回调时，使用该 VO 对象")
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class PayNotifyOrderReqVO {
+
+    @ApiModelProperty(value = "商户订单编号", required = true, example = "10")
+    @NotEmpty(message = "商户订单号不能为空")
+    private String merchantOrderId;
+
+    @ApiModelProperty(value = "支付订单编号", required = true, example = "20")
+    @NotNull(message = "支付订单编号不能为空")
+    private Long payOrderId;
+
+}

yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/notify/vo/PayRefundOrderReqVO.java

@@ -0,0 +1,28 @@
+package cn.iocoder.yudao.coreservice.modules.pay.service.notify.vo;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.NotNull;
+
+@ApiModel(value = "退款单的通知 Request VO", description = "业务方接入退款回调时，使用该 VO 对象")
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class PayRefundOrderReqVO {
+
+    @ApiModelProperty(value = "商户订单编号", required = true, example = "10")
+    @NotEmpty(message = "商户订单号不能为空")
+    private String merchantOrderId;
+
+    @ApiModelProperty(value = "支付退款编号", required = true, example = "20")
+    @NotNull(message = "支付退款编号不能为空")
+    private Long payRefundId;
+
+}

yudao-core-service/src/main/java/cn/iocoder/yudao/coreservice/modules/pay/service/notify/vo/package-info.java

@@ -0,0 +1,6 @@
+/**
+ * 这里的 VO 包有点特殊，是提供给接入支付模块的业务，提供回调接口时，可以直接使用 VO
+ *
+ * 例如说，支付单的回调，使用
+ */
+package cn.iocoder.yudao.coreservice.modules.pay.service.notify.vo;

yudao-framework/yudao-common/src/main/java/cn/iocoder/yudao/framework/common/util/date/DateUtils.java

@@ -6,6 +6,8 @@ import java.util.Date;
 
 /**
  * 时间工具类
+ *
+ * @author 芋道源码
  */
 public class DateUtils {
 
@@ -14,6 +16,11 @@ public class DateUtils {
      */
     public static final String TIME_ZONE_DEFAULT = "GMT+8";
 
+    /**
+     * 秒转换成毫秒
+     */
+    public static final long SECOND_MILLIS = 1000;
+
     public static final String FORMAT_YEAR_MONTH_DAY_HOUR_MINUTE_SECOND = "yyyy-MM-dd HH:mm:ss";
 
     public static Date addTime(Duration duration) {
@@ -74,4 +81,12 @@ public class DateUtils {
         return a.compareTo(b) > 0 ? a : b;
     }
 
+    public static boolean beforeNow(Date date) {
+        return date.getTime() < System.currentTimeMillis();
+    }
+
+    public static boolean afterNow(Date date) {
+        return date.getTime() >= System.currentTimeMillis();
+    }
+
 }

yudao-user-server/src/main/java/cn/iocoder/yudao/userserver/modules/shop/controller/ShopOrderController.java

@@ -1,5 +1,6 @@
 package cn.iocoder.yudao.userserver.modules.shop.controller;
 
+import cn.iocoder.yudao.coreservice.modules.pay.service.notify.vo.PayNotifyOrderReqVO;
 import cn.iocoder.yudao.coreservice.modules.pay.service.order.PayOrderCoreService;
 import cn.iocoder.yudao.coreservice.modules.pay.service.order.dto.PayOrderCreateReqDTO;
 import cn.iocoder.yudao.framework.common.pojo.CommonResult;
@@ -10,10 +11,12 @@ import io.swagger.annotations.ApiOperation;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
 import javax.annotation.Resource;
+import javax.validation.Valid;
 import java.time.Duration;
 
 import static cn.iocoder.yudao.framework.common.pojo.CommonResult.success;
@@ -52,4 +55,11 @@ public class ShopOrderController {
                 .payOrderId(payOrderId).build());
     }
 
+    @PostMapping("/pay-notify")
+    @ApiOperation("支付回调")
+    public CommonResult<Boolean> payNotify(@RequestBody @Valid PayNotifyOrderReqVO reqVO) {
+        log.info("[payNotify][回调成功]");
+        return success(true);
+    }
+
 }