ActiveMQ learning note 1 - getting started

1 Introduction to ActiveMQ 1.1 support multi language and protocol convenient client. Languages: java, python, C, C + +, php, etc Application protocols: OpenWrite, Stomp REST, XMPP, AMQP, etc 1.2 support for spring; 1.3 it supports high-speed message persistence through JDBC and journal, which can b ...

Posted on Thu, 25 Jun 2020 03:32:39 -0400 by droomagon

Using MVC framework to develop a small project for users to log in, register and log out

introduction This year, due to the epidemic, the school didn't start. All the final exams were online exams, and the students were also happy to open their flowers. With the conclusion of Java Web, the teacher also arranged a big assignment to develop a project with MVC architecture. Dragon Boat Festi ...

Posted on Thu, 25 Jun 2020 01:36:36 -0400 by Threepwood

MySQL master-slave replication building (one master and two slaves)

1, Environment introduction The data replication between MySQL is based on binary log files. Once the binary log is enabled in MySQL database, all operations in its database will be recorded in the binary log in the form of events as Master. Other databases as Slave will keep communication with the Ma ...

Posted on Wed, 24 Jun 2020 02:45:40 -0400 by Wetzut

Spring Boot declarative transaction management example

Video Explanation address: (reserved: to be uploaded...)Let's start: What is a database transaction? A database transaction is a single logical unit of work that accesses and potentially modifies the contents of a database.Let's check the mysql database: Open two separate windows for mysql database In a mysql window, create a database ...

Posted on Wed, 24 Jun 2020 01:17:33 -0400 by CaptainChainsaw

Summary of Data Mining Exercises: Linear Regression, KNN, K-means, Decision Tree, Association Rules

Article Directory Job List (4/20) Job List (4/22) csv, linear regression [3] Think about the relationship between maximum likelihood estimation MLE and least squares? Job List (4/29, 5/4) Experimental Report 1. Univariate Regression--Predicting House Price by Area 2. Establish Multiple Regression M ...

Posted on Tue, 23 Jun 2020 21:37:09 -0400 by edking1

Duplicate submissions, how do you handle them?

This morning, a new colleague, Xiao Wang, suddenly asked me, "What is idempotency, Zhou Ge?"Then I explained to him that idempotency means that no matter how many requests you make, the result will be the same.When it comes to idempotency, you have to repeat the submission button. In theory, this is the same data. The database should ...

Posted on Tue, 23 Jun 2020 21:12:08 -0400 by mania

Front End Learning Records 3-HTML

Front End Learning Records 3-HTML list Unordered list ul-li Differences between Tables and Unordered Tables Ordered List ol-li Custom List dl-dt-dd form input control Selectlist control Form label label Do not use for and id methods in label tags textarea control form Form Field (Write the necessa ...

Posted on Tue, 23 Jun 2020 20:49:52 -0400 by Leppy

Design Mode - MVC Mode

Above (Design Mode - Visitor Mode): https://blog.csdn.net/qq_16498553/article/details/106912484 Catalog background What is the MVC mode mode? Roles: Advantage: Disadvantages: What can MVC mode do? MVC Pattern Class Diagram Implementation Code Source download:https://gitee.com/hong99/design ...

Posted on Tue, 23 Jun 2020 12:11:02 -0400 by richardandrewle

RabbitMQ: RabbitMQ delay queue, message delay push

Application scenario At present, the common application software has the shadow of message delay push, which is also widely used, for example: Taobao automatically confirms the receipt within seven days. After we sign in the goods, the logistics system will delay sending a message to the payment syst ...

Posted on Tue, 23 Jun 2020 06:10:01 -0400 by anish

Technology sharing, semi consistent reading and optimization of Update

Author: Zhao Liming Aikesheng, a member of MySQL DBA team, Oracle 10g OCM, MySQL 5.7 OCP, is good at database performance problem diagnosis, transaction and lock problem analysis, and is responsible for dealing with the problems in the daily operation and maintenance of customer MySQL and our company's self-developed DMP platform, and is very ...

Posted on Tue, 23 Jun 2020 06:07:02 -0400 by ultraviolet_998