Java Weekly, Issue 240

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

>> WireMock Tutorial: Request Matching, Part Four [petrikainulainen.net]

A nice write-up that shows how to specify expectations for XML documents received by a web service.

>> Spring Boot 1.x EOL Aug 1st 2019 [spring.io]

That’s one good incentive to finally migrate!

>> 5 Reasons and 101 Bugfixes – Why You Should Use Hibernate 5.3 [thoughts-on-java.org]

If you’ve been wondering whether you should upgrade to Hibernate 5,3, look no further — there is much to be gained, as you’ll see in this article.

>> Improving Testability of Java Microservices with Container Orchestration and a Service Mesh [infoq.com]

A quick overview of the benefits that container orchestration brings to the microservices testing table. Very cool.

>> Configuring Graal Native AOT for reflection [blog.frankel.ch]

A brief look at the challenges faced when using the Ahead-of-Time bytecode compiler to create native images from source code that uses a lot of reflection.

>> How Contract Tests Improve the Quality of Your Distributed Systems [infoq.com]

A detailed piece on how consumer-driven contracts can help you to catch bugs early between the integration points in your systems. This could save you hours of end-to-end testing.

Also worth reading:

>> Thoughts On Jakarta EE’s Vision [blog.sebastian-daschner.com]
>> Spring Cloud Edgware EOL Aug 1st 2019 [spring.io]
>> Memory-Hogging Enum.values() Method [marxsoftware.blogspot.com]
>> String.hashCode() is not even a little unique [vanilla-java.github.io]
>> JVM Language Summit 2018 and Valhalla EA Build 0 [marxsoftware.blogspot.com]

Webinars and presentations:

>> The Future of the Java Platform and the JDK: Who is in Charge? [youtube.com]
>> Evolving the Java Language with @BrianGoetz [youtube.com]

Time to upgrade:

>> Spring Framework 5.0.8 available now [spring.io] and >> Spring Framework 5.1 goes RC1 [spring.io]
>> Spring Boot 2.0.4 available now [spring.io] and >> Spring Boot 1.5.15 available now [spring.io]
>> Spring Data Ingalls SR14 and Kay SR9 released [spring.io] and >> Spring Data Lovelace RC1 available [spring.io]
>> Spring Security 5.0.7 Released [spring.io]
>> Spring Cloud Data Flow 1.6 GA Released [spring.io]
>> Spring IO Platform Brussels SR12 [spring.io] and >>Spring IO Platform Cairo SR3 [spring.io]
>> Eclipse Foundation Releases Eclipse Photon IDE [infoq.com]
>> Apache NetBeans 9.0 Release [netbeans.apache.org]

2. Technical

>> Deep feature consistent variational auto-encoder [krasserm.github.io]

A quick look at a machine-learning algorithm for image analysis and comparison, fueled by neural networks. Fascinating.

>> Use Logging Levels Consistently [reflectoring.io]

A pragmatic approach to deciding what kinds of information to log at which levels. A good read.

>> A beginner’s guide to database multitenancy [vladmihalcea.com]

The title says it all.

>> How to Read an RFC [mnot.net]

As it turns out, the languages used to specify RFCs can leave them open to misinterpretation, even if you know the context(s) around which they were created.