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Please play the leading role: event mechanism in Spring Yes, this section mainly talks about the event mechanism in Spring: ApplicationEventPublisher, which monitors ApplicationEvent, and finally uses event notification to realize asynchronous operation   1. Why implement asynchronous operations In the case of microservices, multiple services ...

In depth Mybatis framework After learning Spring, we have learned how to manage a class as a Bean by the IoC container, that is, now we can use the Mybatis framework in a more convenient way. We can directly hand over SqlSessionFactory and Mapper to Spring for management, and we can use them quickly by injection. Therefore, we need to learn how ...

With the foundation of the red and black trees in front, our task in this section is relatively easy. Let's explain what Map and Set are with the help of network literature. First of all, we need to know that the bottom layers of Map and Set are red and black trees. It is a balanced binary search tree, that is, binary balanced search tree. ...

openGL series article directory preface In the chapter of lighting and materials, we consider the "luster" of objects. However, we have never looked at very shiny objects Modeling, such as mirrors or chrome products. These objects have a small range of specular highlights and can also reflect the surrounding light A mirror image ...

Paragraph label <p>paragraph</p> Exclusive row Title label <h1>Title label</h1> <h2>Title label</h2> <h3>Title label</h3> <h4>Title label</h4> <h5>Title label</h5> <h6>Title label</h6> Common ground: both are bold and block elements Differences: the font s ...

catalogue I data type II Storage of integers in memory III Storage of floating point in memory I data type (1) Integer type: char, short, int, long These types are also divided into signed and unsigned, such as signed char and unsigned char Among them, short, int and long are unsigned by default in the compiler, and whether char is ...

Recently, I was studying Turing textbook by myself< Python Basic course of machine learning ", take some notes in the form of blog on csdn. k-means clustering is one of the simplest and most commonly used clustering algorithms. It attempts to find cluster centers that represent specific areas of data. The algorithm performs the followi ...

Five memory areas of C + + The memory pattern of C + + programs is usually divided into five areas: global data area, code area, stack area, heap area (i.e. free storage area) and constant area.Global data area (static area): store global variables, static data and constants;Code area: store the codes of all class member functions and non memb ...

brief introduction EventBus is an event publish / subscribe framework for Android and Java programming. When using EventBus for event delivery, the publication and subscription of events are fully decomposed and coupled, which frees programmers from the traditional and original event delivery methods (such as Handler, BroadcastReceiver, Interfa ...

1, Usage scenarios for delayed tasks 1. The order was placed successfully and was not paid for 30 minutes. Payment timeout, automatic cancellation of order 2. The order was signed, and no evaluation was conducted 7 days after signing. The order timeout is not evaluated, and the system defaults to high praise 3. The order was placed successfu ...