Programmer Think

1. Demonstration environment description: System CentOS Linux release 7.2.1511 (Core) X_86 64-bit minimal installationThe mysql version is the official binary version 5.7.22-22. mysql is a binary installation. Open two mysql instances on a single machine, open the timer event_scheduler=ON for the mysql instances, and open Gtid for both mysql i ...

RBAC Role-Based Access Control (RBAC) is a role-based access control framework. It is very convenient to manage privileges through user-role-privilege association. What is it? RBAC Please do it yourself. Baidu. Thank you for your support. If there are any mistakes in the article, please contact me or email me linjie.rd@gmail.com. A small gift ...

1. Optimizing code Let's start with a little optimization of yesterday's code. Test methods written in test classes. If we write one test method at a time, we need to build factories or something, and there will be a lot of repetitive code.Modify the test method Mybatis Test public class MybatisTest { ...

I. Application screenshots Preface GPUImage is an open source image rendering library, which can easily achieve many filter effects, and also can easily define and implement its own unique filter effects. Address: https://github.com/cats-oss/android-gpuimage III. Dependent Engineering To use GPUI ...

Problems encountered When developing app s or projects with separate front and back ends, sessions are different each time when using ajax and other ways to access the background, so using Shiro verification is totally impossible to pass. Originally, we used the way of token, which can realize the pro ...

In the past, because of the business needs of the company, some knowledge points of zookeeper were sorted out and shared. For some small partners who have just come into contact with zookeeper, maybe we can learn something from it. Introduction to zookeeper brief introduction Zookeeper is committed to providing a distributed coordination servic ...

Why do you need caching Stretch program performance Relational databases: databases with relationships between data and data mysql/Oracle, sqlserver Non-relational databases: There is no relationship between data and data, key-value 1. File-based database: ehcache 2. Memory-based databas ...

Look at the document djang with a user login verification method, but some look at the foolish, go to the Internet to find a circle, found that many are copying the document description, hardly say what the principle is.   In particular, from django.contrib.auth import authenticate It's said that this is the way, but it seems that the d ...

1. Introduction to Redis Redis is an open source, Key-Value database written in ANSI C, complied with BSD protocol, supported network, memory-based and persistent 2. Data structure of Redis string set mykey somevalue get mykey set mykey somevalue nx set mykey somevalue xx set mykey hello ex 10 ...

Let's solve the problem of image display. 6. Supporting image Look at 2000 Netease, how simple (chou) element (lou). Image.png So it's also necessary to support mainstream image ry! With the above foundation, in fact, adding a picture is also a small case, that is, two points: The type of image. From the table above, we can see these ...