Programmer Think

Five basic types of Redis Note: Note arrangement source: B station UP master maniac said Java Official document: Redis is an open source (BSD licensed) in memory data structure storage system, which can be used as database, cache and message middleware. It supports many types of data structures, such ...

1, What is the sharing mode When it comes to sharing element mode, the first thing I think about is pool technology. String constant pool, database connection pool, buffer pool and so on are all applications of sharing element mode, so sharing element mode is an important way to realize pool technology. ...

Before moving on to dynamic sql, let's start by saying that a user's id in real development is usually out of order, such as random generation using UUID s. Write one below. public class UUIDGenerate { public static String getIdByUUID(){ return UUID.randomUUID().toString().replaceAll("-" ...

shiro's process of permission management 1, Login authentication After the request is initiated: it will judge which permissions are needed through doFilter. Before reviewing shiro, you need to have a certain understanding of springMvc. According to the debug, review the processing flow of MVC - a ...

Series Catalog What is spi 01-spi?Getting Started spi 02-spi battle resolution slf4j package conflict problem spi 03-spi jdk for source code parsing spi 04-spi dubbo for source code resolution spi 05-dubbo adaptive extension adaptive expansion spi 06 - Implement SPI framework from scratch spi 07-Automatically generate SPI profile implementatio ...

ContentService uses the observer mode, and APP registers Uri messages of interest to ContentService through ContentResolver.When the corresponding data changes, ContentResolver calls the notifyChange function to notify ContentService of the corresponding Uri data changes, ContentService queries the corr ...

mysql database account management and DDL language 1, Database account management 1. Account creation and password modification 2. Create Zara account, password zara123, only with query permission 2, mysql four engines 3, Table management 1. Library management 1. Library creation 2. Modification ...

The main functions of Keystone are as follows: 1 manage users and their permissions; 2. Maintain the Endpoint of OpenStack service; 3 Authentication and authentication. 4.1 configure Keystone database #Create database in any control node, the database is automatically synchronized, take controller 1 ...

About the problem of password encryption, brother song has talked with you before. For reference: Two ways of password encryption in Spring Boot! In this article, song introduced two kinds of encryption schemes, but both of them are used independently! Can multiple password encryption schemes exist in the same project at the same time? The an ...

preface The text and pictures of this article are from the Internet, only for learning and communication, not for any commercial purpose. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. Author: pk Ge PS: if you need Python learning mater ...