From http://commons.apache.org/proper/commons-lang/javadocs/api-release/org/apache/commons/lang3/ Official documents to organize and remember for yourself
Boolean Tool Class
and(boolean...array) logic and
BooleanUtils.and(true, true) = true
BooleanUtils.and(false, false) = false ...
Posted by dvd420 on Fri, 17 Jul 2020 17:51:35 +0200
1. Modify in maven projectPom.xmlIntroduce dependencies on spring.<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
Posted by rockintyler on Sun, 05 Jul 2020 16:37:42 +0200
No one has to help you. Everything has to be done by yourself
Hadoop source code compilation
(1) CentOS networking
Configure CentOS to connect to the Internet. Linux virtual machine ping is smooth
Note: use root role compilation to reduce the folder permissions
(2) jar package preparation (hadoop source code, JDK8, maven, ant, p ...
Posted by henryblake1979 on Tue, 30 Jun 2020 10:51:58 +0200
Oozie is an open source framework based on workflow engine contributed by Cloudera company to Apache. It is an open source workflow scheduling engine of Hadoop platform, which is used to manage Hadoop jobs. This article, the first in a series, introduces oozie's task submission phase.
We deduce the implementation f ...
Posted by cowboy_x on Tue, 30 Jun 2020 05:26:29 +0200
Hystrix Dashboard is a real-time monitoring tool for hystrix. Through the Hystrix Dashboard, we can directly see the request response time, request success rate and other data of each Hystrix Command. But if you only use the Hystrix Dashboard, you can only see the service information in a single application, which is obviously not enough. We ne ...
Posted by madhu on Mon, 29 Jun 2020 06:47:29 +0200
As distributed projects get bigger and bigger, hardworking programmers will begin to face a challenge, and configuration files will become more and more complicated, although spring provides a chicken rib solution, spring.profiles.active In the large-scale distributed project system, it's better than nothing. The pain of manual maintenance of c ...
Posted by michealholding on Mon, 29 Jun 2020 06:15:03 +0200
In the development of high concurrency system, there are four tools to protect the system: diffluence, cache, degradation and flow restriction. Based on the author's experience, this paper introduces the related concepts, algorithms and conventional implementation of current limiting.
Concept interp ...
Posted by plapeyre on Mon, 29 Jun 2020 04:11:04 +0200
Lucene (Chinese interpretation web search engine; full text search; search technology; vertical search engine;)
Lucene is a sub project of 4 jakarta project group of Apache Software Foundation, which is an open-source full-text search engine toolkit, but it is not a complete full-text sea ...
Posted by ckjian on Mon, 29 Jun 2020 03:36:01 +0200
File descriptionab is a useful stress test tool that comes with apache. When Apache is installed, ab can be found under binDownload Link
1,yum -y install httpd-tools
View information: ab-V
Unzip after downloading and a ...
Posted by Sangre on Mon, 29 Jun 2020 01:52:59 +0200
1 Basic upload
2 further operation of upload
3 upload restrictions
If your code is developed with standard MVC, it is highly recommended to use SmartUpload. However, if your project code is developed with framework, such as Struts 1.x, Struts 2.x, and Spring MVC, you can only use F ...
Posted by nonexistence on Sun, 28 Jun 2020 06:52:44 +0200