Java Web Weekly, Issue 130
Last updated: June 20, 2023
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.
At the very beginning of last year, I decided to track my reading habits and share the best stuff here, on Baeldung. Haven’t missed a review since.
Here we go…
1. Spring and Java
>> High-Performance Java Persistence – Part Two [vladmihalcea.com]
I’ve been following the progress of this book for a while, and it’s clear that it’s going to be THE reference material for developers aiming to learn Hibernate and JPA for many years to come.
It’s cool that it’s finally almost ready to go out and make some waves.
>> Bean Validation and the Jigsaw Liaison [in.relation.to]
Very nice, code-heavy look into what’s coming to Java, and specifically how the modularization work is going to play with bean validation.
>> Java 9 Additions To Stream [codefx.org]
Java 9 is a-coming, and the improvements to the Stream APIs and general functionality definitely look interesting.
>> Java vs .NET vs Python vs Ruby vs Node.JS: Who Reigns the Job Market?[takipi.com]
Another interesting, data-driven writeup, this time on the state of the job market.
The guys and gals from Takipi have been on a number crunching rampage lately. My best guess is that they hired someone really good at pulling insights out of data.
>> The Fault in Our JARs: Why We Stopped Building Fat JARs [product.hubspot.com]
A different perspective to the fat jar approach of packaging and deploying applications, which makes a lot of sense at real scale.
>> Java EE Guardians Unite to Save Java EE [infoq.com]
A good, quick intro to what the Java EE Guardians group is all about, and of course the general state of the Java EE ecosystem right now.
>> I do not use a debugger [lemire.me]
An interesting take on the concept of self-imposed limitations.
And a personal note here, on learning. I was once forced to not touch my mouse, in a 2-day TDD workshop. It was frustrating, but also a huge boost in learning to get better on the keyboard.
>> Eclipse Foundation Releases Neon [infoq.com]
Yep, it’s that time of year. The new Eclipse is out.
Also worth reading:
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>> Test Well and Prosper: The Great Java Unit-Testing Frameworks Debate[infoq.com]
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>> Faster Mutation Testing [frankel.ch]
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>> How to map JSON objects using generic Hibernate Types [vladmihalcea.com]
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>> jOOQ Tuesdays: Thorben Janssen Shares his Hibernate Performance Secrets [jooq.org]
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>> Creating Value Objects with Immutables [marxsoftware.com]
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>> Maintainability and Expect Literals [jayfields.com]
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>> New JSON Binding Library Is Ready for Public Review [infoq.com]
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>> Hibernate Tips: How to map a view with Hibernate [thoughts-on-java.org]
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>> Ignore Checked Exceptions, All the Cool Devs Are Doing It – Based on 600,000 Java Projects [takipi.com]
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>> JSON Web Tokens With Spring Cloud Microservices [codeproject.com]
Webinars and presentations:
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>> Faster Index for Java, or CDT Pays Its Debt to JDT [infoq.com]
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>> Science at Eclipse [infoq.com]
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>> Building Modern UI for Eclipse RCP [infoq.com]
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>> Webinar Recording: Refactoring with IntelliJ IDEA [jetbrains.com]
Time to upgrade:
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>> Spring Cloud Task 1.0.0.RC1 is now available [spring.io]
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>> Spring Cloud Data Flow 1.0 RC1 released [spring.io]
2. Technical
>> Why I Prefer Merge Over Rebase [techblog.bozho.net]
Yes, discussing the best way to approach a git workflows can be a black hole.
This writeup though is pretty to the point, and actually offers a concrete opinion, so it’s well worth a read.
Also worth reading:
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>> Gil Tene: Understanding Hardware Transactional Memory [infoq.com]
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>> Docker makes database integration testing so much easier [in.relation.to]
3. Musings
>> What It Really Means to Niche Down [daedtech.com]
Intelligent, intentional positioning is rare in our space, which is truly unfortunate. A good read talking about the way to niche down and the benefits that come with such an initially scary prospect.
>> Updating the PerfectTablePlan website [successfulsoftware.net]
This is a cool read about the impact of re-designing a product page.
And it has nothing to do with Java (just FYI).
>> What isn’t Serverless? [martinfowler.com]
>> Serverless [martinfowler.com]
>> Unpacking ‘Function as a Service’ [martinfowler.com]
Different points in the serverless discussion.
Even though I’ve not experimented with most of these concepts in practice, this writeup definitely clears things up and starts making the possibilities clearer for when I will.
Also worth reading:
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>> Agile France 2016 – Decentralized Architecture [cyrille.martraire.com]
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>> 18 Lessons From 13 Years of Tricky Bugs [henrikwarne.com]
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>> Bimodal IT [martinfowler.com]
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>> Test automation – the bitter truth [mrslavchev.com]
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>> With Code Metrics, Trends are King [daedtech.com]
4. Comics
And my favorite Dilberts of the week:
