The Baeldung Weekly Review 9
Last updated: October 16, 2018
Mocking is an essential part of unit testing, and the Mockito library makes it easy to write clean and intuitive unit tests for your Java code.
Get started with mocking and improve your application tests using our Mockito guide:
Handling concurrency in an application can be a tricky process with many potential pitfalls. A solid grasp of the fundamentals will go a long way to help minimize these issues.
Get started with understanding multi-threaded applications with our Java Concurrency guide:
Spring 5 added support for reactive programming with the Spring WebFlux module, which has been improved upon ever since. Get started with the Reactor project basics and reactive programming in Spring Boot:
Since its introduction in Java 8, the Stream API has become a staple of Java development. The basic operations like iterating, filtering, mapping sequences of elements are deceptively simple to use.
But these can also be overused and fall into some common pitfalls.
To get a better understanding on how Streams work and how to combine them with other language features, check out our guide to Java Streams:
Explore Spring Boot 3 and Spring 6 in-depth through building a full REST API with the framework:
Yes, Spring Security can be complex, from the more advanced functionality within the Core to the deep OAuth support in the framework.
I built the security material as two full courses - Core and OAuth, to get practical with these more complex scenarios. We explore when and how to use each feature and code through it on the backing project.
You can explore the course here:
Spring Data JPA is a great way to handle the complexity of JPA with the powerful simplicity of Spring Boot.
Get started with Spring Data JPA through the guided reference course:
Refactor Java code safely — and automatically — with OpenRewrite.
Refactoring big codebases by hand is slow, risky, and easy to put off. That’s where OpenRewrite comes in. The open-source framework for large-scale, automated code transformations helps teams modernize safely and consistently.
Each month, the creators and maintainers of OpenRewrite at Moderne run live, hands-on training sessions — one for newcomers and one for experienced users. You’ll see how recipes work, how to apply them across projects, and how to modernize code with confidence.
Join the next session, bring your questions, and learn how to automate the kind of work that usually eats your sprint time.
Regression testing is an important step in the release process, to ensure that new code doesn't break the existing functionality. As the codebase evolves, we want to run these tests frequently to help catch any issues early on.
The best way to ensure these tests run frequently on an automated basis is, of course, to include them in the CI/CD pipeline. This way, the regression tests will execute automatically whenever we commit code to the repository.
In this tutorial, we'll see how to create regression tests using Selenium, and then include them in our pipeline using GitHub Actions:, to be run on the LambdaTest cloud grid:
The Weekly Review on Baeldung is a curated list of the best stuff I read each week – a handful of articles that are well worth reading (in no particular order).
With the final weekly review of February – hold on to your hat!
On Spring
We’ll start strong with a lot of Spring official resources:
- => Accessing JPA Data with REST – a new guide about the ever-improving REST support in Spring.
- => Groovy Bean Configuration in Spring Framework 4 – the Groovy Bean Builder is a real alternative to the now standard @Configuration classes.
- => Webinar Replay: Spring Data Repositories – Best Practices – Over an hour of Spring Data goodness in video form.
- => Spring Data Redis 1.2 GA Released – Hot on the heels of the Spring Data Release train last week – Spring Data Redis 1.2 is out this week (will be part of the next Spring Data train).
=> Session Timeout and Concurrent Session Control with Spring Security and Spring-MVC
Good look into the Spring Security options for managing sessions.
=> Tracking Application Exceptions With Spring
An interesting discussion about monitoring an application – and building a quick and custom tool to proactively monitor logs. Funny to.
On Java
=> Java 8 Friday Goodies: Easy-as-Pie Local Caching
A look into how Map can be used as a local cache in Java 8 – using the new computeIfAbsent atomic operation and the lambda support.
=> Caching best practices
Inspired by the previous article – Vlad talks through some great insights about caching. I wish I would have read the first part of this post 8 years ago when I was starting out – it would have saved me a bit of time.
=> JUnit ExpectedException rule: beyond basics
If you’ve been dealing with exceptions in JUnit tests manually – using rules is a good step forward, as it eliminates a long of cruft and unnecessary code.
=> How to Eliminate Bugs Through High Cohesion
Example driven discussion about growing and evolving an API – as opposed to trying to get it right from the get go. Read this if you’re building any kind of API (you probably are even if you don’t know it).
=> HOW-TO: Test dependencies in a Maven project (JUnit, Mocito, Hamcrest, AssertJ)
A nice short introduction to going beyond JUnit with additional testing libraries (and Maven).
Technical
=> Increase mobile performances by implementing transparent redirects
The concept of a transparent redirect – and the interesting idea of potentially extending the HTTP spec with a new redirect status.
=> 10 lsof command usages with example – Unix/Linux
Useful to have it your back pocket.
General Musings
=> We Need More Foremen
A great answer to a well intentioned but somewhat limited perspective on teams and good software development. This cuts right to the heart of the problem – on a healthy team, everyone should take responsibility.
Keeping with tradition, if you read one single article out of this weeks review – this is the one you should read!
=> Choosing Secure Passwords
A good in-depth discussion about choosing and administering your passwords – a lot to learn from this article.
=> Define An API By Consuming It
Thinking your way correctly through the decisions you’re building and growing an API is a very useful skill to have. TDD will get you half way there – but ultimately the right frame of mind is very useful when deciding the abstractions and the responsibilities of your own API.
I’ve been picking a lot of API articles lately – mainly because it’s so important to get yours right – which is, I think – a good way to end this one.
