SpringBoot implements the policy of automatic cancellation of orders within 30 minutes

Mondo Finance Updated on 2024-03-04

This article describes in detail several scenarios that implement automatic cancellation of orders within 30 minutes based on the Spring Boot framework, and provides examples**.

Solution 1: Scheduled tasks

With the @scheduled annotations in Spring Boot, we can easily implement scheduled tasks. The task will periodically scan the database, check for unpaid orders, and automatically cancel if the order is not paid within 30 minutes of being generated. 

@component


public class ordercancelschedule 


@service


public class orderservice );


component


rabbitlistener(queues = "orderdelayqueue")


public class orderdelayconsumer 


@service


public class orderservice 


When a key expires, Redis automatically calls this method (you need to configure the expiration event notification function of Redis).


public void onorderkeyexpired(string orderid)
In addition, configure the expiration event notification function of Redis as follows:

Redis key expiration notifications are a typical publish-subscribe model. In Redis, we can subscribe to certain events. The key expiration event is one of them. However, it should be noted that in order to use this feature, you need to make sure that your Redis server has the relevant configuration enabled. Here are the steps and examples:

1.First you need to make sure that the configuration file for redis (usually redisconf). You can do this by adding or modifying the following configuration in the configuration file:

notify-keyspace-events "ex"
Here"ex"Indicates that only key expiration events are listened. If you want to listen to other types of events, you can configure them by referring to the official Redis documentation.

2.Then in the Spring Boot app, you can use itredismessagelistenercontainerto subscribe to the redis key expiration event and specify the ** method to handle it. The following is an example:

@configuration


public class redisconfig , new patterntopic("__keyevent@*_expired"));


return container;
In this example,"__keyevent@*_expired"is a pattern-matching topic that matches key expiration events for all databases. When a key expires, the onmessage method is called, and here you can add your logic to handle the timeout cancellation of the order.

Note that this is just a basic example. In actual use, you may need to adjust and optimize ** accordingly according to your needs.

Summary

The above three options can realize the need for automatic cancellation of orders if they are not paid within 30 minutes. Based on actual business needs, system load, and other factors, you can choose the most suitable implementation solution for your system. Each option has its pros and cons that need to be weighed on a case-by-case basis.

Related Pages