Java Web Weekly, Issue 162
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.
Lots of weekend reading for this week.
Let’s jump right in…
1. Spring and Java
>> Java 9 Enters First Bug Fixing Round [infoq.com]
Java 9 vs Bugs – the first round 🙂
>> Compilation of Java code on the fly [frankel.ch]
A short example showing how to compile Java code at runtime (yes, you read that right).
>> Surprising += Cast [javaspecialists.eu]
Exploring edge cases of casting in Java.
>> Hibernate Tips: How to map an Enum to a database column [thoughts-on-java.org]
A short write-up about a not-so-trivial problem of mapping enums to database columns using Hibernate.
>> Chronicle Queue storing 1 TB in virtual memory on a 128 GB machine [vanilla-java.github.io]
Chronicle Queue utilizes heap space economically 🙂
>> Why Elvis Should Not Visit Java [codefx.org]
As long as Java’s type system doesn’t distinguish between nullable and non-nullable types, the Elvis operator isn’t a good fit for Java.
>> How to automatically validate entities with Hibernate Validator [thoughts-on-java.org]
A short guide to the highly important Hibernate Validator.
>> Tool Time: Preventing leaky APIs with jQAssistant [in.relation.to]
You can now perform some interesting static analysis of your APIs.
>> Surprising += Cast [javaspecialists.eu]
Exploring edge cases of casting in Java.
>> Java Community Oscars – The Top 10 Posts of 2016 [takipi.com]
It turns out Java developers host their own Oscars too 🙂
Also worth reading:
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>> WebSockets With Angular2 and Spring Boot [mmrath.com]
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>> 60k eBills per Hour, Tiny WARs — Or Java EE 7 In Mass Billing and Public Services Market in Slovenia [adambien]
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>> A tool for Spring MockMvcRequestBuilder to post form objects easily [florianlopes.io]
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>> Netflix Introduces Hollow, a Java Library for Processing In-Memory Datasets [infoq.com]
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>> Spring Team at Devoxx US 2017 [spring.io]
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>> Automating Administrative Tasks with iText and DocuSign [antoniogoncalves.org]
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>> Using CDI/Weld to Inject JPA/Hibernate Entity Managers [sitepoint.com]
Webinars and presentations:
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>> Instant Security and Scalable User Management in Spring Boot [infoq.com]
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>> Spring Tips: Couchbase [spring.io]
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>> Spring Data Hazelcast: Fluently Accessing Distributed Repositories [infoq.com]
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>> Reactive Streams, j.u.concurrent, & beyond! [infoq.com]
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>> Streaming Live Data and the Hadoop Ecosystem [infoq.com]
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>> I Can’t Believe It’s Not a Queue: Using Kafka with Spring [infoq.com]
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>> IoT in the Cloud: Build & Unleash the Value in Your Renewable Energy System [infoq.com]
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>> Migrating from Spring XD to Spring Data Cloud Flow [spring.io]
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>> Launching Java EE Thin WARs In The Clouds [adambien]
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>> Spring Tips: Spring Batch [spring.io]
Time to upgrade:
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>> Spring Boot 1.5.1 released [spring.io]
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>> Spring Boot 1.4.4 Available Now [spring.io]
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>> Spring Framework 4.3.6 available now [spring.io]
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>> Spring Integration 4.3.7 is Available [spring.io]
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>> Spring Data Release Train Hopper SR7 Released [spring.io]
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>> Spring Data Release Train Ingalls Goes GA [spring.io]
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>> Hibernate Search with Elasticsearch – the 5.6.0.Final release is here! [in.relation.to]
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>> Spring Cloud Dalston M1 Released [spring.io]
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>> IntelliJ IDEA 2016.3.4 Update is Out [jetbrains.com]
2. Technical
>> Building Event-driven Microservices Using CQRS and Serverless [kennybastani.com]
A rich introduction to building event-driven microservices and CQRS.
>> Revealing Interfaces [michaelfeathers.silvrback.com]
A short trick that might help you clean up your codebase.
Also worth reading:
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>> A beginner’s guide to the Phantom Read anomaly, and how it differs between 2PL and MVCC [vladmihalcea.com]
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>> Set up your own Continuous Delivery stack [pragmaticintegrator.com]
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>> Messaging Patterns for Event-Driven Microservices [pivotal.io]
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>> How to Deploy Kubernetes to Bare-metal With CoreOS and Nginx Ingress Controller [stytex.de]
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>> Messaging Patterns for Event-Driven Microservices [content.pivotal.io]
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>> Git Questions – How to get started with a GitHub project [jetbrains.com]
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>> Peter Bourgon on Gossip, Paxos, Microservices in Go, and CRDTs at SoundCloud [infoq.com]
3. Musings
>> Deep learning: the silver bullet? [lemire.me]
Thoughts about the future of deep learning.
>> Measure Your Code to Get Back on Track [daedtech.com]
What isn’t measured, doesn’t improve. Definitely measure the quality of your code/work as the first step towards improving it.
>> Trust automation [ontestautomation.com]
How to establish trust with your test automation 🙂
>> Processing billions of events/day [plumbr.eu]
An in-depth case study of going from a monolith to scalable Kafka-backed microservices.
Also worth reading:
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>> Valuing Behaviors that Indicate Organizational Mediocrity [daedtech.com]
4. Comics
And my favorite Dilberts of the week:
