What is Elasticsearch? Elasticsearch is a Lucene based distributed full-text search engine that specializes in massive data storage, data analysis, and full-text search queries. It...
January 1, 2020 is Python2's expiration date, a date announced two years ago by "father of Python "GuidovanRossum that has been eagerly awaited by the...
SpringBoot SpringBoot advantages and disadvantages of the core functions SpringBoot features SpringBootCLISpringBootmaven SpringBoot several commonly used annotations SpringBoot core building projects
Without further ado, let's get started. The directory structure above is my own custom, you can also according to their own custom to define. Controller...
Some practical experience and exploration of real-time materialized view based on Flink are discussed in autohome, and Flink Streaming SQL task is developed by using...
@SpringBootApplication: includes @ComponentScan, @Configuration, and @EnableAutoConfiguration annotations. @ComponentScan lets Spring Boot scan the Configuration class and add it to the application context...
Stop-the-world, or STW, refers to application pauses that occur during GC events. Pauses occur when the entire application thread is suspended without any response, a...
The Java Virtual Machine specification makes it clear that although all method areas are logically part of the heap, some simple implementations may not choose...
Background While retrieving messages, I accidentally found that some messages have a time value of -1, as follows: while the other two messages have a...
The singleton pattern is the easiest to understand, the easiest to use, and the most error-prone design pattern. It can be implemented in many ways,...
In some cases, we use sync. map, map+sync.Mutex, or map+sync.RWMutex to avoid exceptions caused by concurrent map writing. This can create a problem if you...
Once you have identified the cache components, you need to design the cache data structure according to the characteristics of the business access. For direct...
When you use field-based dependency injection, you can omit the constructor and setter template types, but you give Spring's IOC full control, and other classes...
Gin provides a very convenient data binding capability that automatically binds the parameters sent by the user to the structure we define. A model binding...
C# 5.0 introduced the async/await keyword to simplify the asynchronous programming model and remove syntactic sugar, which is Net4.0's Task + state machine. It's actually...
Internal work greatly increased! The word IO "disk" is not strange to programmers from the structure of mechanical hard disk and solid state disk. We...
Just stepped into the IT industry formal development of the first project docking enterprise wechat, who knows this is the beginning of the pit. Address...