Java Weekly, Issue 242
Last updated: July 19, 2019
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
>> Simplifying packaging Spring Boot 2 applications into Docker images using Google’s Jib [tech.asimio.net]
A nice write-up about this handy Maven plugin that lets you build a Docker image without a Docker host. Very cool.
>> Use JDBI with Spring Boot [github.io]
Yet another library built on top of JDBC that you can use to interact with your SQL database in Spring Boot.
>> Java serialization [blog.frankel.ch]
A brief primer on the ins and outs of object serialization and deserialization.
>> How to Configure Environment-Specific Logging Behavior with Spring Boot [reflectoring.io]
A pragmatic way to tailor logging configurations to different environments using Spring Boot profiles.
Also worth reading:
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>> Spring Cloud Services – Service Registry [zoltanaltfatter.com]
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>> APIs To Be Removed from Java 11 [marxsoftware.blogspot.com]
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>> New Version of ByteBuddy Fully Supports Java 11 [infoq.com]
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>> Effectively Sealed Classes in Java [4comprehension.com]
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>> What is Eclipse MicroProfile? [tomitribe.com]
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>> Running Flowable on MongoDB [blog.flowable.org]
Webinars and presentations:
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>> Webinar: Building Spring Boot apps with Vaadin 10 [youtube.com]
Time to upgrade:
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>> Spring Cloud for Google Cloud Platform 1.0 goes GA! [spring.io]
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>> Spring Cloud Open Service Broker 2.0.1.RELEASE is now available [spring.io]
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>> Hibernate ORM 5.3.5.Final released [in.relation.to]
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>> Hibernate Validator 6.0.12.Final released [in.relation.to]
2. Technical and Musings
>> Netflix Cloud Security: Detecting Credential Compromise in AWS [medium.com]
With cyber attacks ever on the rise, you can never be too cautious when it comes to protecting your cloud API’s credentials. Good stuff.
>> Terraform Multi-Provider Deployment Including a Custom Provider [blog.codecentric.de]
A solid tutorial on how to write Terraform plugins so that you can deploy an infrastructure spanning multiple cloud providers.
>> Application Safety and Correctness Cannot Be Offloaded to Istio or Any Service Mesh [blog.christianposta.com]
While a service mesh can improve distributed systems reliability, it’s no silver bullet. Developers are still on the hook when it comes to building safety within individual applications.
>> Too Clean? [blog.cleancoder.com]
And finally, a reminder from Uncle Bob that a little messiness can actually make systems more “livable”.
Also worth reading:
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>> My Favorite Command-Line Shortcuts [henrikwarne.com]
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>> Hindsight lessons about API testing [mrslavchev.com]
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>> Hyperledger Fabric test network on AWS using Ansible [blog.codecentric.de]
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>> 5 Good Reasons to Use a Log Server [reflectoring.io]
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>> 3 Reasons Why Version Control is a Must for Every DevOps Team [blog.takipi.com]
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>> Product launch checklist [mehdi-khalili.com]
3. Comics
And my favorite Dilberts of the week:
