Java Weekly, Issue 362
Last updated: December 4, 2020
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.
1. Spring and Java
>> Metaspace in OpenJDK 16 [lkorinth.github.io]
More efficient Metaspace in JDK 16: reduced fragmentation and uncommitting the unused memory.
>> JEP proposed to target JDK 16: Warnings for Value-Based Classes [openjdk.java.net]
One step closer to value types: considering primitive wrappers as value types and deprecating their constructors!
>> Cloud Native Buildpacks with Paketo.io & layered jars for Spring Boot [blog.codecentric.de]
Goodbye Dockerfiles: transforming source codes to Docker images without Dockerfiles with the added benefits of layered Jars.
Also worth reading:
- >> JDK 16: Checking Indexes and Ranges of Longs [marxsoftware.com]
- >> Building Quarkus native images. You can do it too! [tryingthings.com]
- >> (Finally) solving a substitution GraalVM issue [blog.frankel.ch]
- >> How to use CockroachDB with Hibernate [thorben-janssen.com]
Webinars and presentations:
Time to upgrade:
- >> Hibernate ORM 5.4.25.Final released [in.relation.to]
- >> Spring Data 2020.0 – New and Noteworthy in Spring Data for Apache Cassandra 3.1 [spring.io]
- >> Spring Cloud Open Service Broker 3.2.0 Released [spring.io]
- >> Spring Cloud App Broker 1.2.1 released [spring.io]
- >> IntelliJ IDEA 2020.3 Is Out! [blog.jetbrains.com]
- >> Spring Cloud Data Flow 2.6.4 and 2.7.0 Released [spring.io]
2. Technical
>> HATEOAS without links [mscharhag.com]
Discovering the next steps on the client-side: decoupling client and servers of a REST API using HATEOAS.
Also worth reading:
- >> Percona PMM – A beginner’s guide [vladmihalcea.com]
- >> Documenting your relational database using SchemaSpy [tech.asimio.net]
- >> A Dozen Cisco Vulnerabilities at Once [infoq.com]
- >> The Mystery of the Missing Date [dannorth.net]
- >> How to WASM DWARF [lucumr.pocoo.org]
3. Musings
>> Remote work challenges as a team lead [arnoldgalovics.com]
On being an effective remote leader: embracing async communications, better meetings, and team building.
Also worth reading:
- >> Discernment on the Shoulders of Giants [www.javaspecialists.eu]
- >> Mathematical Modelling of Football [henrikwarne.com]
4. Comics
And my favorite Dilberts of the week:
>> Boss Hires Stalker [dilbert.com]
>> Zoom Happy Hour [dilbert.com]
5. Pick of the Week
>> How to Get Lucky: Focus On The Fat Tails [taylorpearson.me]
