Six principles of design patterns
The main content of this article is to list the definition of each principle and my perception of the six principles. The purpose of writing...
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Tag: java
Enhance for recycling considerations
December 6, 2023
by Luke Blackwell
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In development, it's not uncommon to use a for loop to iterate over collections or arrays, and you're used to doing it, but sometimes for...
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JVM_11 Class loading and bytecode technology (class loading and class loaders)
December 6, 2023
by Susan Jones
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1. 1. _JAVA_mirror is the Java class mirror, for example, string.class, Klass is exposed to Java using _super _fields _methods _constants _class_...
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How do I convert a Map to a List in Java? Java Debug notes
December 6, 2023
by Bradley Stanley
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How to convert a Map to a List in Java What is the best way to convert a List to a Map<key,value>? I'm just going...
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Detailed description of Nacos cluster construction process
December 6, 2023
by Donald Morris
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In Nacos's single node, the standalone mode we started with, the configured data is stored by default in an embedded database called Derby. If we...
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替换日志框架过程中对重构的思考
December 6, 2023
by Christina Gutierrez
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1. 动手之前先了解日志的业务逻辑，并统计涉及修改的类 1）程序中的代码逻辑几乎都暗合具体的业务逻辑，重构已有的逻辑之前，要了解已有的逻辑。 2）统计需要修改的类，预估工作量。 2. 根据业务逻辑，由主及次的对涉及到的类进行修改 所以，由主及次的修改往往会使重构的效率大幅增加。…
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A preliminary study of Java proxy pattern
December 6, 2023
by Michael O'Sullivan-Atkinson
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Agent pattern is a common software design pattern. A proxy is a category that acts as an interface to other objects. A proxy can interface...
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Java field guide | Redis bitmap implementation like sign-in related functions
December 6, 2023
by Mr. Robert Padilla
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For some of our usual community applications, such as weibo, Zhihu, Nuggets and other applications, such functions as "like" and "comment" are indispensable. For example,...
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Four characteristics of an operating system
December 6, 2023
by Kashvi Bhasin
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Overview of the four characteristics of the OPERATING system 1. Characteristics of the operating system -- concurrency 2. Characteristics of the operating system -- the...
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Leetcode209, Minimum Length subarray (Two-pointer sliding window algorithm)
December 6, 2023
by Renee Rose
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Given an array of n positive integers and a positive integer s, find the smallest contiguous subarray whose sum is greater than or equal to...
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SQL optimization, precise and efficient scalpel
December 6, 2023
by Kelly Watts-Jackson
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2.1 Two objectives of SQL optimization 2. Table design 3.1 Table design level (5 items) 3. 4.1.1 Avoid index Failure 4.1.4.4.2.IO is always the most...
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How to ensure high concurrency and availability of Redis? Can you introduce the master slave replication principle of Redis? Can you introduce Redis’ sentry principle? Partial replication of data under master/slave architecture?
December 6, 2023
by Kaitlyn Chandler-Monk
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A single Redis can carry QPS ranging from tens of thousands to tens of thousands. For caches, this is generally used to support high read...
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Rabbitmq Docker cluster deployment
December 6, 2023
by Megan Hernandez
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Docker pull rabbitmq:3.6.2. Docker run -d --hostname rabbitmq1 --name myrabbit1 -p 15672:15672 -p 5672:5672 -e RABBITMQ_ERLANG_COOKIE='rabb...
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The interviewer and I were hooked on Maven
December 6, 2023
by Mr. John Morton
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Maven's dependency finding order, scope, lifecycle, dependency principles, how to resolve dependency conflicts, why not customize the package version number?
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Springboot integrates Redis as a secondary cache for Mybatis
December 6, 2023
by Sean Smith
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0. SpringBoot2.3. XMybatis3. XRedis5. X in the machine or server setup redis environment, and start the success! Here I use redis5.xidea2020.1 which is deployed on...
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What is the difference between Iterator and Iterable?
December 6, 2023
by Dishani Gandhi
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That day, small 2 go to the sea kang wei to see the interview, the interviewer Lao Wang came up on the jilted to him...
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Java generics
December 6, 2023
by Shannon Contreras
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The article is explained from the perspective of pure interview, so there are many details that are not foreshadowed. Reflection and generics fundamentals, for example,...
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Does the rollbackFor attribute in @Transaction have to be declared
December 6, 2023
by Kabir Ahuja
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In Alibaba's internal JAVA development specification manual, methods need to specify rollbackFor in the Transactional annotation or rollback shown in a method. I didn't know...
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