Programming VIP

Preface Starting with Spring MVC, session has recently been used to login to the company's system. I have found a lot of information on the Internet, and I have roughly mentioned two ways to save session s: 1. Common HTTP Session for Java Web Engineering 2. Spring MVC-specific @SessionAttributes Personally, I'm concerned about the use of @Sessi ...

Before doing a game development for a period of time, using mina communication framework, afraid of long forgotten, here to sort out the knowledge points. The first is to understand his core nio, but to say this, we must first understand bio. Before jdk1.4, blocking-BIO was used. After jdk1.4, NIO-non-blocking IO was introduced. After jdk1.7, A ...

The act of collecting user privacy is no longer a new topic (collecting is no longer a peek), and even G and MS show off repeatedly. Of course, due to reasons, enterprises can not understand users'behavior through various means, which can be used as a basis for decision support; usually manifested as cross-disciplinary collection(Browser, I ...

Understanding the use of af3.0 af3.0 no longer uses "AFHTTP Request Operation" and only uses NSURLSession, so let's start with how to use NSURLSession to initiate requests What network requests to start under config NSURLSession uses config to establish connections What type of request data is NSURLSession Task, up, down Session &am ...

The source of this paper is: http://www.cnblogs.com/wy123/p/6835939.html    What is waiting Briefly explain what waiting is:When an application initiates a Session request to SQL Server, the Session request requests the required resources during execution in the database.For example, you may apply for memory resources, locks on tables, physi ...

What is session? Session is a session saved on the server side. The typical application scenario of session is that after a user logs on to a website, he puts his login information into session, and inquires the corresponding login information in each subsequent request to ensure that the user is legitimate. Classic scenes such as shopping cart ...

1. User authentication 1.1 auth module from django.contrib import auth Many methods are provided in this module 1.1.1authenticate() user = authenticate(username='someone',password='somepassword') Verifying that the username and password are correct generally requires two keyword parameters, username and password. Authentication passes and t ...

The concept of pool Because the hardware resources of the server are "abundant", a direct way to improve the performance of the server is to exchange space for time, that is, to "waste" the hardware resources of the server in exchange for its operational efficiency. This is the concept of pool. A pool is a collection of ...

One-to-many | many-to-one 1. Relational expression Expressions in the Expressions 　　 Entity expression 　　 Expressions in orm metadata One-to-many <! - Sets, one-to-many relationships, configure in configuration files - > <!-- Name attribute: collection attribute name Column attribute: forei ...

1. High Availability Principle of ActiveMQ Register all ActiveMQ Broker s using ZooKeeper (Cluster). Only one of the brokers can provide services, which are considered Master, while the others are standby and considered Slave. If Master fails to provide services, Zookeeper elects a Broker from Slave to act as Master. Slave connects Master and s ...