Spring4Shell

Will Spring4Shell and Log4Shell change the view on community projects?

Will Spring4Shell and Log4Shell change the view on community projects?Spring JDBC plus two datasources

At the end of March 2022, a serious security vulnerability was discovered in Spring Framework. All versions of spring-core were affected if used with Java 9 and newer. Unfortunately, it happened soon after Log4Shell.

Spring JDBC + 2 datasources

Spring Data JDBC with two datasources

Spring Data JDBC with two datasourcesSpring JDBC plus two datasources

Two databases used by one Spring Boot application does not seem tricky. But they both are accessed through Spring Data JDBC. And then the most tutorials remains tight-lipped. Even though that is not straight forward but still possible.

 

Single task split to 5 subtasks

ExecutorService - how to complete a task by multiple threads in Java

ExecutorService - how to complete a task by multiple threads in Javasplit tasks

Executing operations one after another is easy. However, sometimes we desire more - parallelism. Are you sure you know how to execute tasks in parallel in Java? If not, let me show you how to start multiple threads with ExecutorService, give them some tasks and wait for the result.

Design patterns in examples - State

Design patterns in examples - State

Active, inactive, saved, verified, sent, completed. Do they seem familiar? If so, you have had a potential use case for State design pattern. Would you like to learn it? Then, let's do it.

 

Design patterns in examples - Memento

Design patterns in examples - Memento

Memento is a design pattern that represents one of the possibilities to implement save and restore functionality.

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