Since OpenTelemetry includes Tracing, Logging, and Metrics and is still in the SandBox stage, we will first explore this area through OpenTracing.

Introduction With the popularization of Code security, more and more developers know how to defend against language-independent vulnerabilities such as SQLI and XSS, but little is known about some vulnerabilities and defects related to the development language itself. Therefore, these points are the focus of our Code audit

Event listener, component logout remember to destroy. Component destruction specifies the destruction event. If event listening is not destroyed when the component is logged out, it will still be executed if triggered later, with possible side effects.

You can build different things without knowing how to build them. In the process of building the map, that is, the user delegates the Director class to build the object factory mode, which focuses on the creation method of the whole object, while the builder mode focuses on the creation process of the object, and the process method of creating the object can be called freely during the creation. Enjoy yuan mode: the actual String, pool technology are used, will be a number of functions...

Spring Boot provides a Actuator that helps you monitor and manage Spring Boot applications, such as health checks, auditing, statistics, and HTTP tracking.

The cover picture is taken in hangzhou in 2020 0 o 'clock New Year's Eve scene at the end of the sea of people, take a taxi for 2 hours, then want to see at home B station New Year's Eve is not sweet? But now the retrospect is a different taste. How to Make Your Code Reviewer Fall in Love with You

First, implement built-in filters lower by custom filters! (1) In the templateTags module, create a py file and write custom filters

Redis distributed lock based on SpringBootAOP section-oriented programming Redis distributed lock based on SpringBootAOP section-oriented programming Redis distributed lock

1 PCA 1.1 Dimensionality reduction Methods include principal component analysis (PCA), factor analysis (FA), and independent component analysis (ICA). Principal component analysis: to find the vector and minimize the sum of the projection of each sample to the vector. 1.2 PCA: the purpose of dimensionality reduction, the actual principle of dimensionality reduction is to maximize the objective function (the maximum variance after data projection) strong push principle

It seems that dachang can learn a lot of knowledge is true, but the knowledge is some new vocabulary, such as enabling, grasping, closed loop, link, regress... Programmer, have you learned all this?

I have been paying attention to the development progress of the JDK coroutine library for a long time, but I was very busy and rarely checked the content of the OpenJDK official website. Java coroutine project Loom (because the project is still under development, OpenJDK gives the official website

upload.render({ elem: '#add_ppts' ,url: localStorage.getItem('url') + '/uplo

Good brothers, just like the title, Anjiang was abused, the abuse all over the body, boils down to a dish (real dish). What a sad story it was. Be reasonable. I was pretty confident before I went back. With the advance of the interview, I found that I could not bear, database underlying principle and network related I really do not ah, not forget, the interviewer will pick these to ask, not according to the resume...

After the Introduction to ZooKeeper, we learned the basic usage of ZooKeeper. In fact, The application of ZooKeeper is very wide, the implementation of distributed lock is just one of them. ZooKeeper implements distributed locks to solve the oversold problem. Seckill activity should be familiar, need not explain too much. It's not hard to imagine that in this kind of "split-kill"...

For example, one day you are playing in the river, walking, you see a small stone, hum, throw a small stone into the river, the river made layers of waves. This is called bubbling. 1. Reduce memory consumption 2. The emergence of Ajax, the popularity of local refresh, resulting in each load, must re-bind the event (here using setTimeout asynchronously replaced) to reduce the number of binding, if possible...