Java Web Weekly, Issue 166
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.
Lots of interesting writeups on Java 9 this week.
Here we go…
1. Spring and Java
>> Spring Framework 5.0 M5 Update [spring.io]
Very interesting functionality in the latest Spring 5 pre-release.
>> A use-case for local class declaration [frankel.ch]
From the engineering point of view, there are some nice use cases for defining classes locally but those should be used with caution because they might violate PoLA.
>> Integration testing strategies for Spring Boot microservices part 2 [codecentric.de]
The 2nd part of the series on testing strategies for microservices architectures done in Spring Boot.
>> How to encrypt and decrypt data with Hibernate [vladmihalcea.com]
A short and to-the-point write-up on how to do data encryption with Hibernate.
>> LRU Cache From LinkedHashMap [javaspecialists.eu]
LinkedHashMap can be used for building lightweight LRU caches.
Should you build your own cache? Definitely not, but it’s a fantastic learning tool.
>> Testing RxJava2 [infoq.com]
Testing RxJava is easier than it seems when using dedicated solutions like TestSubscriber, TestScheduler or RxJavaPlugins.
The Awaitility library might come in handy too.
>> Profile-based optimization techniques in the JVM [advancedweb.hu]
A new installment from a deep dive series into optimization techniques for the JVM.
>> The Last Frontier in Java Performance: Remove the Garbage Collector [infoq.com]
Very interesting article about potential ideas for decreasing the GC’s overhead.
Also worth reading:
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>> Java EE 8 – February recap [oracle.com]
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>> PHP-Style JSON Parsing in Java with Jsoniter [sitepoint.com]
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>> How to use Facets to categorize your FullTextQuery results [thoughts-on-java.org]
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>> Building Spring Microservices with Cloud Foundry’s New Container Networking Stack [pivotal.io]
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>> Zen and the Art of Unit Testing [marcin-chwedczuk.github.io]
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>> Q&A with Eric Bottard Regarding Spring Cloud Data Flow for Cloud Foundry [infoq.com]
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>> Using UAA OAuth2 authorization server – client and resource [java-allandsundry.com]
Webinars and presentations:
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>> JBoss Community Asylum – Validating Beans 2.0 [in.relation.to]
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>> Spring Tips: Programmatic Bean Registration in Spring 5 [spring.io]
Time to upgrade:
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>> Spring Framework 5.0 M5 released [spring.io]
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>> IntelliJ IDEA 2017.1 Public Preview: Java 9, Debugger, VCS, Search, Editor and Many More [jetbrains.com]
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>> Spring Framework 4.3.7 released [spring.io]
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>> Kotlin 1.1 Released [jetbrains.com]
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>> Incremental Compilation, the Java Library Plugin, and other performance features in Gradle 3.4 [gradle.org]
2. Technical
>> How does MVCC (Multi-Version Concurrency Control) work [vladmihalcea.com]
A short overview of the MVCC technique – applied of course to database systems, but potentially to other types of systems as well.
>> Secrets of Maintainable Codebases [daedtech.com]
Everyone is talking about developing clean and maintainable databases but what does it actually mean?
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>> Necessary Comments [cleancoder.com]
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>> Robot Framework Web-Template – Selenium2, PhantomJS, Basic Authentification [codecentric.de]
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>> How many floating-point numbers are in the interval [0,1]? [lemire.me]
3. Musings
>> Excited about a ‘2.0’ tech stack for microservices [christianposta.com]
A few thoughts about a new generation of tools for building microservices.
>> Tech jobs are already largely automated [lemire.me]
Very interesting points regarding the reality of our industry and how software is impacting the overall job market.
>> What’s in a Name? Spelling Matters in Code [daedtech.com]
In the age of advanced IDEs, there is no justification for having grammar errors or typos in your codebase.
>> First steps as a test automation coach [ontestautomation.com]
Thoughts about starting to coach teams towards – in this case, towards better testing.
Also worth reading:
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>> Lightbend Speaks to InfoQ on Their Acquisition of OpsClarity [infoq.com]
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>> Back-to-Basic Weekend Reading: Byzantine Generals [allthingsdistributed.com]
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>> Time for Quality [code-cop.org]
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>> The InfoQ eMag: Getting a Handle on Data Science [infoq.com]
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>> Small Diffs and Code Reviews [mattblodgett.com]
4. Comics
And my favorite Dilberts of the week:
>> Are you sure my data is correct? [dilbert.com]
>> Giving 110% [dilbert.com]
>> How to look busy [dilbert.com]
5. Pick of the Week
A really good episode on the important topic of doing deep work:
