one database of user balance, one database of order table, one database of fund details users use balance to place orders, how to ensure that no more orders will be placed and the data are consistent in the case of large concurrency ...
recently, I have been studying the scheme of sub-database and sub-database. I don t have much experience. If you have any questions, I will ask you for advice. for example, an order table with fields: placing an order for id, goods, id, store, id, iss...
use Thymeleaf to say that you want to add dependencies <dependency> <groupId>net.sourceforge.nekohtml< groupId> <artifactId>nekohtml< artifactId> <version>1.9.22< version> < dependency> and c...
504 Gateway Time-out 504 Gateway Time-out nginx ...
Ministry of Communications 808 protocol, control vehicle 8500 problem I want to implement the following scenarios, how to design them? 1. Control the door to unlock separately 2. At the same time, the car door is locked and the buzzer sounds . ...
for example: new byte [] {- 1} byte b = (byte) in.read(); is it possible to read a byte whose b value is-1 and belongs to video or audio? ...
I want to use superagent to send requests to access multiple interfaces. If I get the token, from the first interface, but there are several other requests that need to use the token, I should store the token in a single variable. Would you like to ask ...