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order This paper mainly studies the Parser of puma Parser puma/puma/src/main/java/com/dianping/puma/parser/Parser.java public interface Parser extends LifeCycle { BinlogEvent parse(ByteBuffer buf, PumaContext context) throws IOException; } The Parser inherits the life cycle interface, which defines the parse method and resolves ByteBuffer ...

Author: ksfzhaohui https://my.oschina.net/OutOfMemory/blog/3117737 Recently, there is a demand to analyze an order file, and the description file can reach tens of millions of data, each data is about 20 fields, each field is separated by commas, and it needs to be stored in half an hour as much as possible. thinking 1. Estimate file size Bec ...

Preface For server-side development, most new projects are based on spring boot. Projects using spring boot typically have this line of code SpringApplication.run(TestApplication.class, args); This is where the Spring boot framework loads.It's a whim to see what it's doing. new SpringApplication(primarySources)) The run method first creates a ...

One: Background 1. Storytelling Recently, looking at the major technical communities, whether they know, the Nuggets, the Blog Garden or csdn, we can hardly see any articles about sqlserver class shared by small partners. It looks like sqlserver has disappeared in recent years and no one has written it since. It is impossible to write sqlserver ...

ts, as a js with added type, is similar to java at first, but later I found that there are many differences   fib with type example function fib(n: number): number { return n < 2 ? n : fib(n - 1) + fib(n - 2) } // 0,1,1,2,3,5,8,13,21,34 console.log([...Array(10)].map((_, k) => fib(k)).join(','))   When assigning literal v ...

Recently, many pictures of small programs are uploaded to the Java background, which is written with springboot. Also is stepped on many pits, today will take you to step by step to achieve the upload of small program side many pictures. First, look at the effect realization diagram Callback for successful upload of appletPrint after receiving ...

I believe that we have more or less come into contact with Java's agent mode on the Internet and in our daily study and work. We often hear some terms about static agent and dynamic agent. But do we really know that? At least when I interviewed, I found that many people were not very clear. First of all, agents are easy to understand, that is, ...

Builder Pattern The construction process of complex objects is separated, so that different implementation methods of this abstract process can construct different objects (properties). motivation The builder pattern can separate a part from its assembly process and create a complex object step by step. Users only need to specify the type of ...

Chain of Responsibility Pattern It gives multiple objects the opportunity to process the request, thus avoiding the coupling between the sender and the receiver of the request. Connect these objects into a chain, and pass the request along the chain until there is an object to handle it. motivation Each processing object determines which com ...

html is called hypertext markup language. Note that it's just a markup language, not a programming language. Preparation specification: Composed of tags (html, div, p, h1, etc.) Tags appear in pairs (< HTML >... < / HTML >), with some exceptions, such as < img SRC = "" / >, < br / > Marked with hierarchy ...