Java Web Weekly, Issue 137
Last updated: October 1, 2021
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
>> Updated Spring 5.0 Roadmap and Reactive Story Presented at SpringOne [infoq.com]
A quick forward looking writeup discussing the plans for the next Spring releases and the general direction of the platform.
>> Impact of Java EE 8 Hiatus on Tomcat 9 Highlighted at SpringOne [infoq.com]
Servlet 4.0 can’t get here soon enough, although from the looks of it, the specification is still a long ways off – and that of course has an impact on anything and everything downstream.
>> Fluent API entity building with JPA and Hibernate [vladmihalcea.com]
Some cool exploration of what a fluent API might look like for building JPA/Hibernate entities.
>> The DISTINCT pass-through Hibernate Query Hint [in.relation.to]
A cool, detailed writeup about improving the way Hibernate handles the unnecessary passing of DISTINCT to the generated query.
>> How to get query results as a Stream with Hibernate 5.2 [thoughts-on-java.org]
Nice – streams in the Hibernate APIs, starting with 5.2.
Also worth reading:
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>> Performance cost of reflection [blog.frankel.ch]
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>> Hibernate Tips: How to downcast entities in JPQL queries [thoughts-on-java.org]
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>> Guide to time and date in Java [nurkiewicz.com]
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>> No downtime deployment using “Yet another” Cloud Foundry Gradle plugin [java-allandsundry.com]
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>> How to add an attribute to javax.json.JsonObject [adam-bien.com]
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>> Spring Cloud Series – Integration Testing using Spring Boot, Postgres and Docker [tech.asimio.net]
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>> Using asynchrony to reduce response times in Java 8 [praveer09.github.io]
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>> Remote JMS with WildFly Swarm [eisele.net]
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>> Remembering to Reset Thread Context Class Loader [marxsoftware.com]
Webinars and presentations:
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>> Webinar Recording: What’s New in IntelliJ IDEA 2016.2 [jetbrains.com]
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>> Webinar Recording: What’s New in IntelliJ IDEA 2016.2 for Spring Developers [jetbrains.com]
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>> Microservices + Events + Docker = Perfect Trio [plainoldobjects.com]
Time to upgrade:
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>> Second bug-fix release for ORM 5.2 [in.relation.to]
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>> IntelliJ IDEA 2016.1.4 Update Available [jetbrains.com]
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>> Apache Commons Crypto 1.0.0 Released [apache.org]
2. Technical
>> Understanding Security by Country: SSL [shodan.io]
Interesting and damn scary data as always.
>> System Observability: How to Make Your Production Environment Great Again [takipi.com]
The observability of a system is a core aspect of going into production and it definitely needs to be considered and built in from the start.
Also worth reading:
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>> Characterization Testing [michaelfeathers.silvrback.com]
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>> Why Most Programmers Get Pagination Wrong [jooq.org]
3. Musings
>> How Do I Write Good Code? [daedtech.com]
A solid attempt to answer the question in earnest. Really.
>> Future of Serverless Architectures [martinfowler.com]
The wrap-up section of the huge and quite interesting deep-dive into Serverless Architectures.
Also worth reading:
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>> Writing Laws Is Quite Like Programming [techblog.bozho.net]
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>> What you should and shouldn’t worry about when you complete today’s census [troyhunt.com]
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>> Logging for Continuous Integration [daedtech.com]
4. Comics
And my favorite Dilberts of the week:
