Java Web Weekly, Issue 125
Last updated: September 3, 2022
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.
A bit of a quicker one this week, as I’m writing it in between Spring IO sessions.
Here we go…
1. Spring and Java
>> Thymeleaf 3 – Get Started Quickly with Thymeleaf 3 and Spring MVC [codeleak.pl]
A quick and to the point intro to using Thymeleaf with Spring, hopefully getting the industry one step closer to never touching a JSP file ever again.
>> How to Split JUnit Tests in a Continuous Integration Environment [semaphoreci.com]
A solid, thorough writeup focused on intelligently separating the way different tests run in a CI pipeline. Very useful stuff.
>> 13 Decks Java Developers Must See to Stay Updated [takipi.com]
Some very interesting slide-decks worth going over. Not only for the subject matter, but also to see what the cadence of a good talk looks like.
Also worth reading:
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>> Cyclops-react Organises the Cambrian Explosion of Java 8 Libraries [jooq.org]
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>> Modern Architecture with Containers, Microservices, and NoSQL [eisele.net]
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>> JUnit vs Spock + Spock Cheatsheet [jakubdziworski.github.io]
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>> High-Performance Java Persistence – Chapter 16 – Caching [vladmihalcea.com]
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>> Eclipse Platform on Java 9 b118 [waynebeaton.wordpress.com]
Webinars and presentations:
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>> Modular Java Applications with OSGi [infoq.com]
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>> Types Working for You, Not against You [infoq.com]
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>> Microservices at Spotify [corejavainterviewquestions.com]
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>> Interview with Simon Ritter on Java 9 [infoq.com]
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>> Live Webinar: Refactoring with IntelliJ IDEA [jetbrains.com]
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>> Compositional I/O Stream in Scala [infoq.com]
Time to upgrade:
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>> Spring Session 1.2.0 Released [spring.io]
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>> Spring IO Platform 2.0.5.RELEASE [spring.io]
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>> Spring Integration 4.3.0 Release Candidate Available [spring.io]
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>> Spring Boot 1.4.0.M3 Available Now [spring.io]
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>> Spring LDAP 2.1.0 Released [spring.io]
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>> Hibernate OGM 5 is out! [in.relation.to]
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>> Spring LDAP 2.1.0 Released [spring.io]
2. Technical
>> Cleanup Temp Files [techblog.bozho.net]
This is a quick writeup that I was thinking would make the “Also word reading” section below.
But, temporary files and applications that just keep growing and growing is such a common and overlooked problem that I think it’s really worth thinking about if you’re writing that kind of app.
Also worth reading:
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>> Understanding CSP, the video tutorial edition [troyhunt.com]
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>> X1 Instances for EC2 – Ready for Your Memory-Intensive Workloads [aws.amazon.com]
3. Musings
>> Dirty Hacks Are OK [techblog.bozho.net]
“I know this is not the best advice I’ve given” – that cracked me up.
But, in all seriousness, once you know the rules, yes, sometimes it’s definitely OK to break them.
>> CodeFX Leveled Up [codefx.org]
I thoroughly enjoyed reading this piece, from so many points of view.
First, it’s a clear, ambitious plan that I’m sure Nicolai is going to execute on well.
But more importantly – it represents forward movement in a space where so many people sit still for years and years – blogging. It’s quite easy to find yourself settle in a rhythm and doing the things that you’ve always been doing.
Shake things up!
>> The Gravitational Force of Wage Labor [daedtech.com]
An interesting read on the dynamics of longer term consulting engagements.
>> DDD Is Expensive Is A Myth [sapiensworks.com]
Like all the other DDs, Domain Driven Design may look like it’s more work at the beginning, but overall, the level of clarity that it brings into a system dwarfs the time it takes to understand and implement.
>> Simple Asynchronous Microservices using Lambda Architecture [vanillajava.blogspot.com]
A good first step towards understanding the Lambda architecture.
>> Lessons learned from delivering a test automation workshop [ontestautomation.com]
I’m doing more workshops this year, so I enjoyed going through this one. Have a look if you’re interested in either side of the workshop experience.
Also worth reading:
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>> Analytics First [dandreamsofcoding.com]
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>> To ELK or Not to ELK? That Is the Question [loggly.com]
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>> Does it even make sense to move to San Francisco? [swizec.com]
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>> Going dark: online privacy and anonymity for normal people [troyhunt.com]
4. Comics
And my favorite Dilberts of the week:
