Java Web Weekly, Issue 138
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.
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
>> Oracle Unveils Plan to Revamp Java EE 8 for the Cloud [infoq.com]
The plans Oracle has for the Java EE ecosystem – an important read but definitely not a positive one.
>> Managing your Database Secrets with Vault [spring.io]
This trend of finally getting solid, well-supported management of credentials and sensitive information – is quite helpful to the security of most systems out there.
>> JPA providers market share in 2016 [vladmihalcea.com]
Market data is so often overlooked but so very important for understanding an industry.
That’s why I run my yearly survey, that’s why I enjoy reading the RebelLabs reports and that’s why this dataset is significant as well.
Also worth reading:
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>> JUnit 5 – An Early Test Drive – Part 2 [infoq.com]
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>> How to use Java 8’s Optional with Hibernate [thoughts-on-java.org]
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>> Java NullPointerException: The One Tiny Thing That’s Killing Your Chances of Solving It [takipi.com]
Webinars and presentations:
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>> Escaping the Bikeshed with JSON-API [infoq.com]
Time to upgrade:
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>> Spring Security 4.1.2 Released [spring.io]
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>> Spring for Apache Kafka 1.0.3 available now [spring.io]
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>> Hibernate ORM 5.1.1.Final [relation.to]
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>> API Mocking Tool WireMock v2 Released with Improved Request Matching and Stub Management [infoq.com]
2. Technical
>> Starting with Cucumber for end-to-end testing [frankel.ch]
An interesting and reluctant adoption of Cucumber with some Spring goodness in there for good measure.
>> Website enumeration insanity: how our personal data is leaked [troyhunt.com]
A good read about enumeration attacks, all in stories. Funny stories about companies acting silly with their security.
>> The Basics of Web Application Security [martinfowler.com]
A solid look at the basics.
>> StatsD vs collectd vs fluentd and Other Daemons You Should Know [takipi.com]
A good, high level overview of the options we have for daemons, when collecting data off a production box.
I’ve personally been using collecd for years – and it gets the job done, but I’ll certainly be looking fluentd after reading this piece.
>> DDD Decoded – Bounded Contexts Explained [sapiensworks.com]
>> DDD Decoded – Domain Services Explained [sapiensworks.com]
I’m thoroughly enjoying this series on the basics of DDD.
Also worth reading:
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>> New – AWS Application Load Balancer [aws.amazon.com]
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>> Now Available – IPv6 Support for Amazon S3 [aws.amazon.com]
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>> Serializability, linearizability, and locality [aphyr.com]
3. Musings
>> Static Analysis and The Other Kind of False Positives [daedtech.com]
Wrangling a large codebase with static analysis tools often comes down to the art of tuning the tool to keep enthusiasm up – for both you and your team. To many warnings and the problem looks to large. To few and you’re not seeing enough.
Of course, with a bit of discipline and experience, you can get to more manageable codebase if you keep at it.
>> All Libraries Should Follow a Zero-Dependency Policy [jooq.org]
A very good point, event though it’s sometimes easier said than done.
>> Can’t you make the team work harder? [dandreamsofcoding.com]
A balanced and thoughtful approach to management – lots to learn from here, whichever side of the table you happen to sit.
Also worth reading:
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>> Code Reviews At Disy – Where We Were and What We Wanted [codefx.org]
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>> Continuous Delivery and user interface-driven test automation: does that compute? [ontestautomation.com]
4. Comics
And my favorite Dilberts of the week:
