Java Weekly, Issue 255
Last updated: October 23, 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.
Here we go…
1. Spring and Java
>> Eleven Hidden Gems In Java 11 [blog.codefx.org]
A nice run-down of some cool new Java features, including methods for String, Optional, and Collection.
>> Spring Boot in a Container [spring.io]
A treasure trove of tweaks for creating optimized docker images for Spring Boot applications, and a handful of tools and plugins to automate the build process. Good stuff.
>> JHipster, Angular, PrimeNG and AutoComplete [antoniogoncalves.org]
A solid write-up on optimizing the REST layer of a JHipster app by mapping the REST models to DTOs rather than to entities and using Jackson views to minimize payloads.
>> Introducing Amazon Corretto, a No-Cost Distribution of OpenJDK with Long-Term Support [aws.amazon.com]
If you aren’t thrilled with Oracle’s new pricing structure for Java, Amazon has your back.
Also worth reading:
-
>> Lessons Learned from the JVM Ecosystem Report 2018 [blog.takipi.com]
Webinars and presentations:
-
>> Reactive Spring Security 5.1 by Example [infoq.com]
-
>> Securing Spring Functions by Breaking In [infoq.com]
-
>> JDK 9, 10, 11 and beyond: Delivering New Feature in the JDK [infoq.com]
-
>> The New Kid on the Block: Spring Data JDBC [infoq.com]
-
>> Java Streams vs Reactive Streams: Which, When, How, and Why? by Venkat Subramaniam [youtube.com]
-
>> Lambdas and Streams Master Class Part 1 José Paumard, Stuart Marks voxxed [youtube.com]
-
>> Product Management of AI Products [infoq.com]
Time to upgrade:
-
>> Spring Cloud Pipelines to Cloud Pipelines Migration [spring.io]
-
>> Apache Releases TomEE 7.1 with Support for Java 8 and MicroProfile 1.2 [infoq.com]
-
>> Microsoft Announces the General Availability of Azure Event Hubs for Apache Kafka [infoq.com]
-
>> JHipster release v5.7.0 [jhipster.tech]
-
>> Elastic Stack 6.5.0 Released [elastic.co]
2. Technical and Musings
>> Expanding the Cloud – The Second AWS GovCloud (US) Region, AWS GovCloud (US-East) [allthingsdistributed.com]
AWS launches its second US-based global infrastructure region, designed to meet the stringent requirements of the public sector and highly regulated industries.
>> Automating Terraform: Infrastructure as Code as a Service [blog.scottlogic.com]
A project to compare Big Data technologies reveals the challenges involved in automating the task of provisioning a series of experimental cloud environments.
>> The New Killer Apps: Teamwork and Weak Signal Detection Lessons From the Military [infoq.com]
A fascinating write-up on the U.S. Navy TOPGUN school’s role in advancing the science of teamwork.
>> Why Good Developers Write Bad Unit Tests [mtlynch.io]
And a reminder that, when it comes to writing tests, readability is more important than abstraction.
Also worth reading:
-
>> The Builder pattern is a finite state machine! [blog.frankel.ch]
-
>> Delivering Meaning with Previews on Web [medium.com]
-
>> How to Source Control Your Databases for DevOps [infoq.com]
-
>> Challenges of Building a Reliable Realtime Chat Service [infoq.com]
-
>> Building Production-Ready Applications: Michael Kehoe Shares Lessons Learned from LinkedIn [infoq.com]
- >> Widespread Architectural Changes using IDEs [blog.code-cop.org]
-
>> What to do when some of the team you’re working with aren’t as technically adept as you [blog.scottlogic.com]
-
>> Enthusiasts vs. Pragmatists: two types of programmers and how they fail [codewithoutrules.com]
3. Comics
And my favorite Dilberts of the week:
