How does Stream in Java work?Case Details

Be careful: Stream does not store elements by itself. Stream does not change the source object.Instead, it returns a new Stream with the result Stream operations are delayed, meaning they will not execute until a result is needed.(Delayed Loading)Additionally, note that you will inevitably encounter a variety of problems during your advanced ...

Posted on Sat, 23 May 2020 02:27:51 -0400 by Skor

New features of JDK9: How does the xlog of JVM work correctly?Case Details

JVM is the basis of running java programs. Events in JVM such as GC, class loading, JPMS, heap, threads and so on can actually be logged.Through these logs, we can monitor events in the JVM and, in turn, tune java applications. The Xlog log log service introduced in JDK9 was created for this purpose.Also note: Many people will inevitably enco ...

Posted on Sat, 23 May 2020 02:19:53 -0400 by kpmonroe

Summary of Solr's Study I

Heart Word: Because relational databases have always been in contact with before, all of these nosql s do not fit in very well.It is often used in companies.This is not difficult to learn, but for future review.I decided to write down some of the skills and experiences I learned Environment Configuration for Solr This is a lot of online st ...

Posted on Fri, 22 May 2020 12:19:56 -0400 by potatoCode

Configuring Maven skills in Eclipse

Configuring Maven in Eclipse Specify the path to configure and install maven Mavan local warehouse with Eclipse: Instead of the warehouse and setting we configured, you can also use the default one relation setting.xml file to configure setting.xml , plus Alibaba proxy imageIt will be slow to download jar directly from the address of the centr ...

Posted on Fri, 22 May 2020 12:14:10 -0400 by en

Talk about the ElapsedTimeStrategy of debezium

order This paper mainly studies the ElapsedTimeStrategy of debezium ElapsedTimeStrategy debezium-v1.1.1.Final/debezium-core/src/main/java/io/debezium/util/ElapsedTimeStrategy.java @FunctionalInterface public interface ElapsedTimeStrategy { /** * Determine if the time period has elapsed since this method was last called. * * ...

Posted on Fri, 22 May 2020 10:23:47 -0400 by pjsteinfort

SpringBoot code generator, no need to manually roll code from now on

preface Usually, when starting to develop a project, the database related tables will be established first, and then Controller, Service, DAO, Model and some front-end pages will be generated according to the table structure. If there are no mandatory constraints before development, and every programmer has his own coding habits, it will event ...

Posted on Fri, 22 May 2020 05:03:10 -0400 by mindevil

Measuring piece of Android UI drawing process

After the analysis of the previous prelude, we know that the performTraversals method of ViewRootImpl has officially entered the measurement, layout and drawing process of View. This paper focuses on the measurement process of View. Go straight to the code frameworks/base/core/java/android/view/ViewRootImpl.java private void performTraversals ...

Posted on Fri, 22 May 2020 03:54:32 -0400 by irandoct

Swagger permission control part 1: Implementation Based on Apache Shiro

Many articles mentioned that Swagger should be turned off in the production environment to prevent system resource leakage. Today, with my own experience in the development process, I share a method that can be implemented in just a few lines of code to allow Apache Shiro to take over Swagger authentication and authorization. If there is a bett ...

Posted on Fri, 22 May 2020 03:11:03 -0400 by K3nnnn

Special Solution of Perl Equation by Continuous Fraction Method

Reprinted from https://blog.csdn.net/wh2124335/article/details/8871535?locationNum=14&fps=1 1. Forms of the Perl equation: $$x^2-Dy^2=1, \D is a positive integer $$ 2. Special Solutions to the Perl Equation The special solution refers to the smallest integer solution of the Perl equation, and it is easy to find that y also reaches the ...

Posted on Thu, 21 May 2020 21:19:41 -0400 by jimson

Submit Spark tasks remotely to yarn cluster

Reference article:How to submit spark tasks to yarn cluster remotely in idea Several modes of running spark tasks: 1, local mode, write code in idea and run directly. 2,standalone mode, need to jar package program, upload to cluster, spark-submit submit to cluster run 3,yarn mode (local,client,cluster) as above, also requires jar packa ...

Posted on Thu, 21 May 2020 20:09:40 -0400 by twilightnights