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Task (asynchronous, scheduled, mail) Asynchronous task~ Multithreading Timed task~ timerExpression~ Mail sending~ timepop3/SMTP service 1, Asynchronous task (async) 1. Application scenario ​ 1. It takes time to send e-mail. Open asynchrony to let the user receive the information of the sent e-mail first, and then another thread sends ...

I had a day before that. Although seata is easy to use and super simple to use, the installation and configuration is really troublesome. I met various pits. Let's get to the point. o(╥﹏╥)o I edition Note: if the versions do not match, there will also be various errors. You can match the versions according to the official website. sea ...

Spring Boot source code analysis II (startup process principle) entrance @SpringBootApplication public class MyApplication { public static void main(String[] args) { SpringApplication.run(MyApplication.class, args); } } **SpringApplication.run(MyApplication.class, args);** Follow in public static ConfigurableApplica ...

HashMap is a collection container that senior java engineers must be proficient in. Its importance is almost equal to the importance of Volatile in concurrent programming (visibility and order).Through the detailed explanation of graphic source code, this article deeply analyzes the important kernel knowledge of HashMap, which is easy to read, ...

summary Installation and introduction Introduction to typical application scenarios Asynchronous communication and service decoupling Taking user registration as the actual scenario, the traditional enterprise application processes user registration. First, the user enters user name, email or mobile phone number on the interface. After conf ...

Integrating spring security, spring boot and redis, jwt realizes the function of separate login authentication and picture verification code at the front and back ends First, we need to understand the general implementation process of the spring security filter chain: That is, when a user initiates a request, he will enter the Security filter ...

Hello, I'm brother Jun. As an excellent message flow platform, Pulsar is used more and more. This article explains Pulsar's Java client. Deploy Pulsar Pulsar can be deployed in three ways: local binary installation, docker deployment and Kubernetes deployment. This paper uses docker to deploy a single node Pulsar cluster. The experimental e ...

1.1 introducing pom dependency When introducing SpringBoot and SpringCloud versions, pay special attention to their compatibility Reference: https://spring.io/projects/spring-cloud <!--introduce springboot Parent project dependency--> <!--Introduce dependency: It can be omitted version Tag to get some reasonable ...

01. Homology strategy The same origin policy is a security function of the browser. Client scripts from different sources cannot read or write to each other's resources without explicit authorization. Homology policy is the cornerstone of browser security. What is the source The source [origin] is the protocol, domain name and port number. F ...

catalogue 1. Operating environment 2. Use ieda to build the project 2.1 create parent project 2.2 creating subproject works 2.3 two subprojects call each other 1. Operating environment (1)jdk 1.8+ (2)maven 3.2.x+ 2. Use ieda to build the project 2.1 create parent project (1) First, create a parent project to manage sub projects and ...