AOP application in actual development 1. Background The company’s business belongs to the B-side, and the existing back-end management and Android client are implemented by separating the front and back ends of the Web. The client supports offline mode. Since it supports offline mode, the problem of data synchronization arises. The Android side uses SQLite […]
Tag: ppl
Analysis and application of connection pool in Python
Connection Pool (Connection Pool) stores network connections as objects in memory during system initialization. When the user needs to connect, an established empty connection object is taken from the connection pool and the connection is not closed after use. , put the connection back into the connection pool without having to frequently create and close […]
ESP32 IDF development application? Wifi UDP communication
ESP32 IDF development application? Wifi UDP communication 1. The blogger’s purpose for writing this technical article: 2. Overview 3. Introduction to Socket API library 4. Software design 5. Examples Don’t get lost-Navigation bar Quickly navigate to find what you want (article directory) If this article is useful to you, please like and save it. Your […]
DevOps application solution based on Docker containers
Table of Contents Experimental requirements: 1. Preparation work 2.gitlab host operation 3. harbor host operation 4. jenkins host operation Write jenkins pipeline script Experimental requirements: 1. Deploy gitlab and upload the code of the above project to your own gitlab warehouse (the first host) 2. Deploy jenkins based on tomcat (second host) 3. Deploy harbor […]
Selenium+JQuery positioning method and application
Selenium + JQuery positioning method and application 1 JQuery positioning instructions 1.1 JQuery positioning method 1.2 The three most commonly used operations in JQuery 1.3 JQuery an example 1.3.1 Username input box 1.3.2 Password input box 1.3.3 Login button 1.3.4 Complete code 2 JQuery selectors 2.1 List of commonly used selectors 2.2 Thinking 1. Selenium […]
“Data Structure, Algorithm and Application C++ Language Description” – Code to implement key-value ordered linked list jump list
Skip list Definition Searching in a dictionary of n number pairs described by an ordered linked list requires at most n key comparisons. If a pointer is added to the middle node of the linked list, the number of comparisons can be reduced to n/2 + 1. At this time, in order to find a […]
SpringBoot application starts org.apache.catalina.LifecycleException
Table of Contents SpringBoot application starts org.apache.catalina.LifecycleException Problem Description Cause Analysis Solution 1. Check the resources that the application depends on 2. Check application configuration 3. Check port occupancy 4. Check dependent component version compatibility 5. Check the log files Application scenario example: org.apache.catalina.LifecycleExceptionexception caused by database connection exception SpringBoot application starts org.apache.catalina.LifecycleException When developing […]
WinForm application interface development practice – how to integrate external API interface calls in a hybrid framework
In our regular business processing, most of the internal processing interfaces are database-related and based on the Winform development framework of hybrid development. Although when the client calls, the general choice is also based on Web API calls, but the back-end We may not only process our business database, but also call other external interfaces, […]
.NET Framework 4.8 console application in C# accesses the established database through EF
Table of Contents 1. Create a .NET Framework 4.8 console application 2. Establish a database 1. Establish database Blogging in SSMS 2. Create a new database connection on VS 3. Install the EF package 4. Automatically generate EF models and contexts 1.Blog.cs class model 2. Model of Post.cs class 3.BloggingContext.cs database context 5. Write an […]
Application case of chain stack: expression evaluation
There is a complete code at the end of the article. Readers who have questions can discuss it together in the comment area, or they can communicate and learn together through private messages. 1: Question requirements Case Analysis Any expression is composed of operands, operators and delimiters, collectively called words. Generally, the operand can be […]