Java Web Weekly, Issue 177
Last updated: January 23, 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.
Lots of interesting writeups on Java 9 this week.
Here we go…
1. Spring and Java
>> Is Jigsaw Dead? Not quite. [tomitribe.com]
A very needed clarification of the JCP process and what has actually happened to Jigsaw recently.
>> Ordering vs Sorting with Hibernate – What should you use? [thoughts-on-java.org]
One might think that ordering and sorting is the same operation but it turns out there are slight differences in Hibernate 🙂
>> Reactor Bismuth release train first milestone available [spring.io]
An important milestone for the Reactor project, with some very interesting new functionality.
Also worth reading:
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>> IntelliJ IDEA 2017.2 EAP: Run Dashboard for Spring Boot [jetbrains.com]
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>> JVM Statistics with jstat [marxsoftware.blogspot.com]
- >> Hibernate Tips: How to log the execution time of a query [thoughts-on-java.org]
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>> The detaching pitfall of declarative transaction management with Spring and JPA/Hibernate [blog.arnoldgalovics.com]
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>> Survey – Behavior of @Positive and @Negative constraints [beanvalidation.org]
Webinars and presentations:
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>> When Enterprise Java Micro Profile meets Angular [antoniogoncalves.org]
Time to upgrade:
- >> Spring Boot 2.0.0 M1 Available Now [spring.io]
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>> Spring Session 2.0.0 M1 Released [spring.io]
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>> Hibernate Search 5.8.0.Beta2 is out! [in.relation.to]
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>> Spring Security 5.0.0 M1 [spring.io]
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>> Spring REST Docs 1.2.1.RELEASE [spring.io]
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>> Spring Batch 4.0.0.M2 is now available [spring.io]
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>> Spring Cloud Data Flow 1.2 GA released [spring.io]
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>> Spring Cloud Stream Chelsea.SR2 Released [spring.io]
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>> Hibernate Validator 6.0.0.Beta1 is out with improved Bean Validation 2.0 support [in.relation.to]
2. Technical and Musings
>> Why are you testing your software? [frankel.ch]
Sometimes it makes sense to take a step back and rethink if it’s absolutely necessary to achieve the coverage of 100%.
>> When Subclasses Are Ready To Die [thecodewhisperer.com]
Some back-to-basics and timeless design principles here.
>> How Much Code Should My Developers Be Responsible For? [daedtech.com]
There is no universal answer to this question but it is a good idea to keep the “bus factor” concept in mind
Also worth reading:
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>> Lightbend Charity Survey: Who’s Doing What With Streaming, Fast Data and IoT? [lightbend.com]
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>> A Developer’s Guide To Docker – A Gentle Introduction [developer.okta.com]
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>> EC2 In-Memory Processing Update [aws.amazon.com]
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>> Why you should totally switch to Kotlin [medium.com]
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>> Why you should always use hibernate.connection.provider_disables_autocommit for resource-local JPA transactions [vladmihalcea.com]
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>> Importance of given-when-then in unit tests and TDD [solidsoft.wordpress.com]
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>> Podcast Released: Agile Architecture with Martin Fowler and Rebecca Wirfs-Brock [coalition.agileuprising.com]
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>> What Can Men Do [trishagee.github.io]
- >> Starting a New Engagement as a Lead Consultant [jayfields.com]
3. Comics
And my favorite Dilberts of the week:
>> You can’t make an omelet without breaking some eggs [dilbert.com]
>> I’m an awesome leader, therefore I must be hilarious [dilbert.com]
>> Each engineer cost us one million dollars [dilbert.com]
4. Pick of the Week
This week I’ve been both super busy but also excited to finally launch the new Certification Classes in each of my 2 courses:
