Secondary Kill Real Fight - High Concurrency Optimization

Catalog 1. Use caching Page Cache+URL Cache+Object Cache (1) Page caching and URL caching (2) Object Cache 2. Page Statization 1. Use caching Page Cache+URL Cache+Object Cache Advantages of using these caches: 1. Reduce database pressure (core) 2. Enhance the user experience 3. Enhance syste ...

Posted on Thu, 11 Jun 2020 12:22:48 -0400 by lucidpc

Real-Time Label Development - Build a real-time user portrait from scratch

​ Data Access Access to data can be accessed by writing data to Kafka in real time, either directly or through real-time access methods such as oracle's ogg or mysql's binlog ogg Golden Gate (OGG) provides real-time capture, transformation and delivery of transaction data in heterogeneous environments. Through OGG, data from oracle can be writ ...

Posted on Wed, 10 Jun 2020 22:48:11 -0400 by swizenfeld

Introduction and Practice of SQL Functions for PostgreSQL

RDBMS, as a safe, shared and reliable software management system for managing data, needs to organize and store data according to different data models. In order to facilitate the processing of data for users, any database provides rich processing functions for different data types in order to simplify the complexity of business development.In ...

Posted on Tue, 09 Jun 2020 13:50:47 -0400 by mjgdunne

SpringBoot: implement users to log in to different pages according to their roles

This article records the simple process of user login with SpringBoot, which is very difficult for me to get started, so I will feature this article after the login. Describe the problems and doubts I encountered in the process of implementation, which is also my own learning notes!! Development env ...

Posted on Tue, 09 Jun 2020 04:04:11 -0400 by markspec87

Simple implementation of Android Notepad function

The implementation of Android Notepad function time stamp Time stamp of edit box Get system time and transform format Save the time to the database and update the time every time you modify it About the layout of time Initialize view Time stamp for notepad list Time to get each note from the data ...

Posted on Tue, 09 Jun 2020 03:50:09 -0400 by sumday

Spring Job? Quartz? XXL-Job? Young people make choices~

Hello, my name is grandma. I'm a little fat man in the subway~ Today, let's take a look at the technology selection of timing tasks in Spring Boot applications~ 1. Overview Among the colorful and black requirements of products, there is a kind of requirement, which needs to be executed at a fixed time. At this time, it needs to use a fixed time ...

Posted on Tue, 09 Jun 2020 01:27:40 -0400 by aftabn10

. NET Core integrates log4net and global exception capture

1, Foreword Log4net is a well-known log provider. When. NET Core released 1.0, log4net was already supported. However, there is no log4net in the official log provider recommended by. NET Core, and I don't know the internal reason. Write a gadget with. NET Core, in which log4net is used for logging. This paper mainly records how to integrate lo ...

Posted on Tue, 09 Jun 2020 00:09:50 -0400 by phreud

activiti learning - regular user task jump (return, free jump function)

summary Through the understanding of the previous articles, at present we have enough knowledge to jump to the regular userTask. In the "Chinese process", rejection, free jump and so on are all realized by this way. It can be said that this is also an important part of the activiti process ...

Posted on Mon, 08 Jun 2020 23:03:55 -0400 by Democreous

MongoDB Quick Start, that's all right!

SpringBoot e-commerce project mall (30k+star) address: https://github.com/macrozheng/mall abstract Although relational databases are still the mainstream now, it is necessary to learn a mainstream NOSQL database to supplement them when facing some requirements.MongoDB is a rich NoSQL database. This introductory tutorial is organized from its m ...

Posted on Mon, 08 Jun 2020 21:26:03 -0400 by d_priyag

Summary algorithm (hash algorithm, hash algorithm)

A brief introduction to the algorithm The algorithm is also called hash algorithm and hash algorithm. It uses a function to convert any length of data into a fixed length data string (usually represented by a hexadecimal string). Python's hashlib provides common summary algorithms, such as MD5, SHA1, SHA512, and so on. Tips: It should be n ...

Posted on Mon, 08 Jun 2020 00:36:46 -0400 by Phpdiot