一. 延迟消息队列
1. 在提交支付之后，可以发送一个延迟检查的队列，来主动查询用户在支付宝上的支付状态
在mq的配置/config/activeMq.xml的broker实例上配置
schedulerSupport="true"
2 延迟检查如果失败，则从新发送新的检查队列，并且要将检查次数减一
// 没有支付，再次发送检查队列
System.out.println("订单号："+out_trade_no+"尚未支付成功，再次发送检查队列，剩余检查次数："+count);
if(count>0){
System.out.println("订单号："+out_trade_no+"检查次数尚未用尽，再次发送检查队列"+count);
count --;
paymentService.sendDelayPaymentCheckQueue(out_trade_no,count);
}else {
System.out.println("订单号："+out_trade_no+"检查次数耗尽，停止检查，调用关单服务");
}
二. 幂等性检查
调用相同的服务,返回的结果始终一样,叫做幂等性检查.
例子:
第一步,在支付的controller层发起延迟队列
@RequestMapping("/alipay/submit")@ResponseBodypublic String alipay(Model model, HttpServletRequest request,String orderSn){ // 查询对应订单信息 OmsOrder omsOrder = orderService.getOrderBySn(orderSn); AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();//创建API对应的request alipayRequest.setReturnUrl(AlipayConfig.return_payment_url); alipayRequest.setNotifyUrl(AlipayConfig.notify_payment_url);//在公共参数中设置回跳和通知地址 Map<String,Object> requestMap= new HashMap<>(); requestMap.put("out_trade_no",orderSn); requestMap.put("product_code","FAST_INSTANT_TRADE_PAY"); requestMap.put("total_amount",0.01); requestMap.put("subject",omsOrder.getOmsOrderItems().get(0).getProductName()); alipayRequest.setBizContent(JSON.toJSONString(requestMap));//填充业务参数 String form=""; try { form = alipayClient.pageExecute(alipayRequest).getBody(); //调用SDK生成表单 } catch (AlipayApiException e) { e.printStackTrace(); } // 保存支付数据 PaymentInfo paymentInfo = new PaymentInfo(); paymentInfo.setOrderSn(orderSn); paymentInfo.setPaymentStatus("0"); paymentInfo.setTotalAmount(omsOrder.getPayAmount()); paymentInfo.setSubject(omsOrder.getOmsOrderItems().get(0).getProductName()); paymentInfo.setOrderId(omsOrder.getId()); paymentService.addPayment(paymentInfo); System.out.println(form); // 发送一个检查支付结果的队列(延迟队列) paymentService.sendDelayPaymentCheckQueue(orderSn,7);// 调用支付宝的支付状态接口程序 return form;}
@Overridepublic void sendDelayPaymentCheckQueue(String orderSn,long count) { // 发送orderSn的延迟检查队列 ConnectionFactory connectionFactory = activeMQUtil.getConnectionFactory(); Connection connection = null; Session session = null;// 开启消息事务 Queue paymentResultQueue = null; // 队列 MessageProducer producer = null; try { connection = connectionFactory.createConnection(); connection.start(); session = connection.createSession(true, Session.SESSION_TRANSACTED); paymentResultQueue = session.createQueue("PAYMENT_CHECK_QUEUE"); //text文本格式，map键值格式 MapMessage mapMessage=new ActiveMQMapMessage(); mapMessage.setString("out_trade_no",orderSn); mapMessage.setLong("count",count); //消息延迟消费 mapMessage.setLongProperty(ScheduledMessage.AMQ_SCHEDULED_DELAY,1000*30); producer = session.createProducer(paymentResultQueue);// 消息的生成者 producer.send(mapMessage); session.commit(); } catch (JMSException e) { e.printStackTrace(); }finally { try { producer.close(); session.close(); connection.close(); } catch (JMSException e) { e.printStackTrace(); } }}
@Componentpublic class PaymentConsumer { @Autowired PaymentService paymentService; @JmsListener(containerFactory = "jmsQueueListener",destination = "PAYMENT_CHECK_QUEUE") public void consumePaymentCheckQueue(MapMessage mapMessage) throws JMSException { String out_trade_no = mapMessage.getString("out_trade_no"); long count = mapMessage.getLong("count"); System.out.println("开始检查支付状态。。。订单号："+out_trade_no); // 系统支付的幂等性检查 String status = paymentService.checkPayStatus(out_trade_no); if(status!=null&&!status.equals("已支付")){ // 检查支付状态 Map<String,Object> map = paymentService.checkPayment(out_trade_no); if(map!=null&&(((String)map.get("trade_status")).equals("TRADE_SUCCESS")||((String)map.get("trade_status")).equals("TRADE_FINISHED"))){ // 保存支付信息，发送支付成功队列 System.out.println("订单号："+out_trade_no+"已经支付成功，继续后续操作"); // }else{ // 没有支付，再次发送检查队列 System.out.println("订单号："+out_trade_no+"尚未支付成功，再次发送检查队列，剩余检查次数："+count); if(count>0){ System.out.println("订单号："+out_trade_no+"检查次数尚未用尽，再次发送检查队列"+count); count --; paymentService.sendDelayPaymentCheckQueue(out_trade_no,count); }else { System.out.println("订单号："+out_trade_no+"检查次数耗尽，停止检查，调用关单服务"); } } } }}
@Overridepublic String checkPayStatus(String order_sn) { PaymentInfo paymentInfo = new PaymentInfo(); paymentInfo.setOrderSn(order_sn); PaymentInfo paymentInfo1 = paymentInfoMapper.selectOne(paymentInfo); return paymentInfo1.getPaymentStatus();}
@Overridepublic Map<String, Object> checkPayment(String out_trade_no) { // 调用支付宝，检查支付状态 AlipayTradeQueryRequest request = new AlipayTradeQueryRequest(); Map<String,Object> map = new HashMap<>(); map.put("out_trade_no",out_trade_no); request.setBizContent(JSON.toJSONString(map)); AlipayTradeQueryResponse response = null; try { response = alipayClient.execute(request); } catch (AlipayApiException e) { e.printStackTrace(); } if(response.isSuccess()){// isSuccess System.out.println("调用成功，交易已经创建"); String tradeNo = response.getTradeNo(); String tradeStatus = response.getTradeStatus(); map.put("trade_no",tradeNo); map.put("trade_status",tradeStatus); return map; } else { System.out.println("调用失败，用户尚未创建交易");// } return null;}以上,就完成了!