Java Weekly, Issue 360
Last updated: March 14, 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.
1. Spring and Java
>> From Spring Boot to Quarkus [blog.frankel.ch]
The new kid on the block: a practical guide on how to migrate a typical Spring Boot app to Quarkus!
>> New language features since Java 8 to 15 [advancedweb.hu]
Java evolution for people in a hurry: an anthology of improvements and new features available in modern Java.
>> Getting Started with Spring Data Specifications [reflectoring.io]
Flexing data access with Specifications: a more maintainable approach for ad-hoc queries with a myriad of custom filters.
Also worth reading:
- >> Spring Boot Apps with Kong API Gateway using OpenAPI & Declarative Configuration [blog.codecentric.de]
- >> Mapping Java Records to JSON columns using Hibernate [vladmihalcea.com]
- >> Spring Cloud Streams and Elasticsearch sink [spring.io]
- >> Monitoring Spring Boot with Prometheus and Grafana [ordina-jworks.github.io]
Webinars and presentations:
- >> A Bootiful Podcast: Spring Boot 2.4 and living legend, CTO, and friend John Davies [spring.io]
- >> OpenJDK Projects Give Rise to Innovations in JDK 15 and Beyond [youtube.com]
- >> Secrets of the Shenandoah Garbage Collector [youtube.com]
Time to upgrade:
- >> Spring Boot 2.4.0 available now [spring.io] and >> Spring Boot 2.3.6 available now [spring.io]
- >> Hibernate ORM 5.3.20.Final released [in.relation.to]
- >> Hibernate Search 5.11.6.Final released [in.relation.to]
- >> Spring Data 2020.0 – New and Noteworthy in Spring Data MongoDB 3.1 [spring.io] and Spring Data JDBC 2.1 [spring.io] and Spring Data R2DBC 1.2 [spring.io]
2. Technical
>> On distributed systems and elliptic curve cryptography [martin.kleppmann.com]
Going all academic on distributed systems and EC cryptography: An academical and yet practical take on distributed systems and ECC.
Also worth reading:
- >> Permutation – Heap’s Algorithm [java-allandsundry.com]
- >> The how of monitoring your services [blog.codecentric.de]
- >> Use-cases for IAM roles [advancedweb.hu]
- >> How to use OpenAPI with API Gateway REST APIs [advancedweb.hu]
3. Musings
>> The No-Excuses Guide to Innovation with APIs [blog.scottlogic.com]
Reinventing digital services by thinking and acting more strategically instead of pursuing one-off solutions.
Also worth reading:
- >> IIoT product development: lessons from past projects [blog.codecentric.de]
4. Comics
And my favorite Dilberts of the week:
>> Information From Carl [dilbert.com]
>> Rewriting Shakespeare [dilbert.com]
>> Real Men Multitask [dilbert.com]
5. Pick of the Week
Datadog is back, with full visibility into an always growing number of solid, native integrations – both in and out of the Java ecosystem:
>> End-to-end visibility into performance and code efficiency with Datadog APM
Simply put, you can drill in starting with the browser all the way down to individual DB queries – with no sampling, which is a little bit crazy to think about 🙂
