Java Weekly, Issue 394
Last updated: November 28, 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.
Distributed systems often come with complex challenges such as service-to-service communication, state management, asynchronous messaging, security, and more.
Dapr (Distributed Application Runtime) provides a set of APIs and building blocks to address these challenges, abstracting away infrastructure so we can focus on business logic.
In this tutorial, we'll focus on Dapr's pub/sub API for message brokering. Using its Spring Boot integration, we'll simplify the creation of a loosely coupled, portable, and easily testable pub/sub messaging system:
1. Spring and Java
>> Quarkus & Hibernate – Getting Started [thorben-janssen.com]
Developing k8s-native Java apps – a practical guide on using Quarkus and Hibernate together.
>> Kotlin’s “internal” Visibility Modifier and Java Interoperability [4comprehension.com]
Kotlin and messing with method names to implement the internal visibility. Short but insightful.
Also worth reading:
- >> Neo4j, Java and GraphQL [info.michael-simons.eu]
- >> Faster Spring Boot Testing with Test Slices [developer.okta.com]
- >> Why use Memory Mapped File or MapppedByteBuffer in Java? [javarevisited.com]
- >> JavaFX: One Codebase for Web, PC, and Mobile [infoq.com]
- >> Blaze Persistence – the best way to write JPA Criteria queries [vladmihalcea.com]
- >> How to Manually Deploy a Quarkus Application to Azure with Terraform Thanks to NubesGen [antoniogoncalves.org]
Webinars and presentations:
- >> A Bootiful Podcast: Matt Raible [spring.io]
Time to upgrade:
- >> Spring Framework 5.3.9 and 5.2.16 available now [spring.io]
- >> Quarkus 2.0.1.Final released – Maintenance release [quarkus.io]
- >> Spring Authorization Server 0.1.2 available now [spring.io]
- >> Spring Cloud Hoxton.SR12 has been released [spring.io]
2. Technical & Musings
>> Kubernetes API and Feature Removals In 1.22: Here’s What You Need To Know [kubernetes.io]
K8S 1.22 is around the corner – prepare by knowing the API removals, changes, and additions.
>> Elasticsearch Indexing Strategy in Asset Management Platform (AMP) [netflixtechblog.medium.com]
How Netflix is using Elasticsearch to indexing and searching the metadata for video and image assets – project Amsterdam!
Also worth reading:
- >> How I Wish I Had Some Unit Tests! An Example [blog.thecodewhisperer.com]
- >> The Internet of Things is a Complete Mess (and how to Fix it) [troyhunt.com]
- >> Synchronizing Neo4j Causal Cluster Bookmarks [info.michael-simons.eu]
- >> A Rust controller for Kubernetes [blog.frankel.ch]
- >> Lambda development toolbox: Set environment variables locally [advancedweb.hu]
- >> Book Review: A Philosophy of Software Design [henrikwarne.com]
- >> Adjusting the Dial of Fear [diegobasch.com]
3. Comics
And my favorite Dilberts of the week:
>> A slight decrease [dilbert.com]
>> Need more data [dilbert.com]
>> Never heard of BOTOX! [dilbert.com]
4. Pick of the Week
>> Software Development Is Misunderstood [itnext.io]
