Java Weekly, Issue 220
Last updated: September 3, 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.
Here we go…
1. Spring and Java
>> Monitor and troubleshoot Java applications and services with Datadog [sponsored background-image=”linear-gradient(to right, #b728b7 0%,#3423ad 100%)”]
Optimize performance with end-to-end tracing and out-of-the-box support for popular Java frameworks, application servers, and databases. Try it free.
>> Testing auto-configurations with Spring Boot 2.0 [spring.io]
Cool – Spring Boot 2.0 provides a suite of new test helpers for easily configuring an ApplicationContext to simulate auto-configuration test scenarios.
>> How to customize the Jackson ObjectMapper used by Hibernate-Types [vladmihalcea.com]
The new configuration mechanism allows customizing an ObjectMapper used by hibernate-types and some useful other behaviors.
>> Feature lifecycle in Java [blog.frankel.ch]
A quick reminder what feature lifecycle in Java looks like.
>> Improve Launch Times On Java 10 With Application Class-Data Sharing [blog.codefx.org]
Application Class-Data Sharing is another interesting feature of Java 10 which can turbocharge Java applications start-up time.
Also worth reading:
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>> Spring Boot 2.0 on ACID! Big Data + Spring Boot [dzone.com]
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>> SpringBoot 2 performance — servlet stack vs WebFlux reactive stack [medium.com]
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>> Opening Doors with Spring Boot 2.0 [content.pivotal.io]
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>> Updates on JavaFX, Valhalla, Data Classes, and Java’s Floating-Point [marxsoftware.blogspot.com]
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>> Easy Gradle Project Generation [bmuschko.com]
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>> If You’re Planning to Write Java Code in 2020 – Here Are the Top 5 Predictions You Can’t Afford to Miss [blog.takipi.com]
Webinars and presentations:
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>> Spring Integration 5.0: What’s New? [infoq.com]
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>> Upgrading start.spring.io to Spring Boot 2 [spring.io]
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>> Reactive Data Access with Spring Data [infoq.com]
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>> Everything’s Coming Up Dilbert: Building Product in the Enterprise [infoq.com]
Time to upgrade:
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>> Spring Batch 3.0.9.RELEASE and 4.0.1.RELEASE are now available [spring.io]
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>> Spring Web Flow 2.5 released [spring.io]
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>> Fifteenth bug-fix release for ORM 5.2 [in.relation.to]
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>> Hibernate Validator 6.0.8.Final released [in.relation.to]
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>> JetBrains Releases Kotlin 1.2.30 [infoq.com]
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>> Spring Cloud Data Flow 1.4 RC1 released [spring.io]
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>> Release Notes – Maven 3.5.3 [maven.apache.org]
2. Technical and Musings
Also worth reading:
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>> Unlocking Enterprise systems using voice [allthingsdistributed.com]
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>> Agile, oven-fresh documentation. Part 2: PlantUML with JBake [blog.codecentric.de]
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>> Stream-Relational Processing Platforms [yokota.blog]
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>> Introduction to AWS IoT: Getting your sensordata into AWS [blog.codecentric.de]
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>> End to End Tests [benjiweber.co.uk]
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>> How to Get Clients for Your New Consulting Business [daedtech.com]
3. Comics
And my favorite Dilberts of the week:
