Java Web Weekly, Issue 163
Last updated: January 9, 2024
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 full week in the Java ecosystem. Here we go…
1. Spring and Java
>> Java Module System Hands-On Guide [sitepoint.com]
As Java 9 is getting closer and closer, it might be worth looking at a practical introduction to Project Jigsaw.
>> Proposal for a Java policy files crafting process [frankel.ch]
A few lessons learned during the process of developing policy files.
>> Java Time (JSR-310) enhancements in Java SE 9 [joda.org]
It turns out that java.time is not perfect and can be improved 🙂
>> Oracle Reminds Java Developers that Soon They Won’t Have a Browser to Run Applets [infoq.com]
Just a reminder that applets will soon not be runnable in any browser.
>> GitHub Research: Over 50% of Java Logging Statements Are Written Wrong [takipi.com]
The latest GitHub research shows that meaningful logging is not that common (especially in production environments).
>> Add full-text search to your application with Hibernate Search [thoughts-on-java.org]
Integrating Lucene/Elasticsearch with Hibernate-managed databases becomes much easier by using Hibernate Search.
>> MicroProfile Becomes Eclipse MicroProfile [infoq.com]
As the title suggests 🙂
>> Configure Jenkins for Continuous Delivery of a Spring Boot application [pragmaticintegrator.com]
CD tutorial with Jenkins and Spring Boot.
>> In Praise of Laziness [sitepoint.com]
Laziness at the language level in Java.
Also worth reading:
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>> Refreshable Configuration using Spring Cloud Config Server, Spring Cloud Bus, RabbitMQ and Git [tech.asimio.net]
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>> Microservice using Docker stack deploy – WildFly, Java EE and Couchbase [couchbase.com]
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>> Java Thread Class in Five Minutes [sitepoint.com]
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>> Spring Team at Devnexus 2017 [spring.io]
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>> Improving percentile latencies in Chronicle Queue [vanilla-java.github.io]
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>> JSON is the new data transfer object (DTO) [adambien]
- >> IntelliJ IDEA 2017.1 EAP Extends Debugger with Async Stacktraces [jetbrains.com]
Webinars and presentations:
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>> Spring and Big Data [spring.io]
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>> Spring For Apache Kafka [spring.io]
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>> Spring Tips: Distributed Tracing with Zipkin [spring.io]
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>> Asynchronous WAR to WAR Communication with WebSockets [adambien]
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>> Creating a CustomElement (WebComponent) from scratch [adambien]
Time to upgrade:
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>> Hibernate Validator 5.4.0.Final [in.relation.to]
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>> Spring IO Platform Brussels-RC1 [spring.io]
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>> Spring Cloud Camden.SR5 is available [spring.io]
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>> Spring for Apache Kafka 1.1.3 available now [spring.io]
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>> JHipster release 4.0.0 [jhipster.github.io]
2. Technical
>> Jepsen: MongoDB 3.4.0-rc3 [jepsen.io]
Whenever one of these in-depth analysis comes out, I set aside time to read it.
Not because I’m necessarily working with that particular technology (I’ve luckily stayed away from MongoDB for a long time) – but because there’s so much to learn from these in-depth dives into how the store works.
>> How We Interview at Pivotal [pivotal.io]
There are definitely some nuggets to pick up from this one if you’re doing interviewing.
Also worth reading:
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>> How does database pessimistic locking interact with INSERT, UPDATE, and DELETE SQL statements [vladmihalcea.com]
- >> Storing and querying trillions of events [plumbr.eu]
3. Musings
>> What do you mean by “Event-Driven”? [martinfowler.com]
An exploration of the “event-driven” concepts.
>> Elasticsearch Ransomware Attacks Highlight Need for Better Security [loggly.com]
Open-source is cool but we need to cross check if adoption of such technologies will not impose unnecessary risks.
>> Reputation Suicide, and Why I’m Quitting Disqus [daedtech.com]
Disqus is back to its old distasteful tricks again (yes, they’ve done it to this site as well).
>> On elegance [ontestautomation.com]
According to Dijkstra, elegance is a quality that decides between success and failure.
>> Hazelcast release Jet, open-source stream processing engine [infoq.com]
Hazelcast released a new interesting product – Jet – a stream processing engine.
Also worth reading:
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>> Back-to-Basics Weekend Reading – Bloom Filters [allthingsdistributed.com]
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>> Management competencies [dandreamsofcoding.com]
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>> Comments in Clean Code? Think Documentation [daedtech.com]
4. Comics
And my favorite Dilberts of the week:
