Programmer Think

1. The concept of locks in JAVA Spin Lock: When a thread acquires a lock, if the lock has already been acquired by another thread, the thread will wait in a loop and constantly determine if the lock can be acquired successfully until it is acquired. Optimistic lock: If there is no conflict, read the latest data when modifying the data and ...

White list 2.4.1 what is a white list Problem: all requests are blocked and do not meet the actual requirements. (some requests do not need to be intercepted) White list: used to store the request path that does not need to be blocked 2.4.3 implementation Step 1: modify the gateway yml file, and configure the path that does not need to be b ...

This series of blog is mainly practical, and it doesn't introduce the long winded things. The content mainly comes from the book "Java multithreaded programming core technology" The keyword synchronized can also be applied to static static methods. If it is written in this way, the Class class corresponding to th ...

Language integrated query (LINQ), which integrates query syntax in C programming language, can access different data sources with the same syntax. LINQ provides the abstraction layer of different data sources, so the same syntax can be used. public class Book { public int Id { get; set; } /// <summary> /// Title /// </ ...

BeanUtils 1, Introduction & Overview & Introduction BeanUtils make it easier and faster to encapsulate JavaBean data. For example, it can be used in band parameter construction, Set method, reflection.   Getting started: Import jar package: public static void main(String[] args) throws Exception { //Populating Phone obje ...

Understand object-oriented design through several functional numbering evolution def01.py 1 dog1 = { 2 'name':'Yuan Hao', 3 'gender':'mother', 4 'type':'Tibetan Mastiff' 5 } 6 dog2 = { 7 'name':'Lee Lee', 8 'gender':'common', 9 'type':'Sausage' 10 } 11 12 def jiao(dog): 13 print('A dog[%s],Wang Wang'%dog[' ...

To write HTML structure through VUE, tempplate attribute is generally recommended, which is easy to use. The specific code is as follows: Example 1: use template to render ul list var vm = new Vue({ el:"#demo1", template:` <ul class = "bg" style = "fontSize:20px" abc = "yyy"> <li ...

[MQ Series] Introduction to basic use posture of RabbitListener The message sending posture of rabbitmq was introduced before. Since there is sending, there must be consumers. In the spring boot environment, consumption is relatively simple. With @ RabbitListener annotation, you can basically meet more than 90% of your business development n ...

  With PHP7.4, there is an extension that I think is very useful: PHP FFI (Foreign Function interface), which refers to a description in PHP FFI RFC: For PHP, FFI provides a way to write PHP extensions and bindings to C libraries in pure PHP. Yes, FFI provides high-level languages to call each other directly. For PH ...

1.API Interface Design Specification https://github.com/mishe/blog/issues/129 2. Security Design a. Whitelist restrictions Accept only the request response from a specific system, the caller's IP address needs to be reported in the system, otherwise it cannot be invoked b. Validation of legitimate identity Basic Authentication: This ...