Java Web Weekly, Issue 133
Last updated: July 20, 2016
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.
Distributed systems often come with complex challenges such as service-to-service communication, state management, asynchronous messaging, security, and more.
Dapr (Distributed Application Runtime) provides a set of APIs and building blocks to address these challenges, abstracting away infrastructure so we can focus on business logic.
In this tutorial, we'll focus on Dapr's pub/sub API for message brokering. Using its Spring Boot integration, we'll simplify the creation of a loosely coupled, portable, and easily testable pub/sub messaging system:
At the very beginning of last year, I decided to track my reading habits and share the best stuff here, on Baeldung. Haven’t missed a review since.
Here we go…
1. Spring and Java
>> Stagnation with Java EE 8: Can the Java Community Make a Difference? [infoq.com]
The Java EE story unfolding.
>> JUnit 5 M1 [marcphilipp.de]
The official announcement of the very first milestone of JUnit 5. Good stuff – it looks like it’s time to give this one a real try.
>> JUnit 5 – Dynamic Tests [codefx.org]
And speaking of the first milestone of JUnit 5, Nicolai is of course continuing to explore the very cool aspects of JUnit. This one is about the concept of a dynamic test, which can potentially be quite powerful.
>> How to Get Started with Java Machine Learning [takipi.com]
A quick overview of machine learning in the Java ecosystem. It’s a bit of a shame that Mahout has been abandoned in this space, as it was showing some promise a few years back.
>> Robot Framework Tutorial 2016 – Integration with Jenkins [codecentric.de]
Solid intro to setting up the Robot Framework with a new Jenkins 2.0 server from scratch. Definitely one to bookmark for if/when you have to do that.
>> The best way to detect database connection leaks [vladmihalcea.com]
DB connection leaks are never fun and almost never easy to find and solve. This is a good introduction to how you may handle that.
>> Stackoverflow: 7 of the Best Java Answers That You Haven’t Seen [takipi.com]
A fun an interesting idea – having a look at a few of the top questions about Java on StackOverflow.
Some of these brought me right back to the Operating Systems course in college 🙂
Also worth reading:
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>> Hibernate Tips: How to map native query results to entities [thoughts-on-java.org]
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>> HTTP-RPC: A Lightweight Cross-Platform REST Framework [infoq.com]
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>> Run your Spring Boot application on AWS using Elastic Beanstalk [pragmaticintegrator.com]
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>> CVE-2016-5007 Spring Security / MVC Path Matching Inconsistency [spring.io]
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>> Updating Hibernate ORM in WildFly [in.relation.to]
Webinars and presentations:
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>> Understanding Parallel Stream Performance in Java SE 8 [infoq.com]
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>> Validating JsonObjects In JAX-RS With Bean Validation And Java EE 7 [adam-bien.com]
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>> Just Enough App Server with WildFly Swarm [antoniogoncalves.org]
Time to upgrade:
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>> Spring Security 4.1.1 Released [spring.io]
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>> Spring IO Platform 2.0.6.RELEASE [spring.io]
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>> Spring Cloud Task 1.0.1.RELEASE is now available [spring.io]
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>> Spring Cloud Brixton.SR3 is available [spring.io]
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>> Spring Cloud Data Flow 1.0 GA released [spring.io]
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>> Spring for Apache Kafka 1.0.2 available now [spring.io]
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>> Java DSL for Spring Integration 1.2 M1 and 1.1.3 are available [spring.io]
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>> IntelliJ IDEA 2016.2 is Here! [jetbrains.com]
2. Technical and Musings
>> Jepsen: VoltDB 6.3 [aphyr.com]
Another deep analysis of a persistence solution that doesn’t quite do what it advertises yet, but is on the right track to getting there.
These kinds of in-depth dives into the low level problems of a persistence implementation are priceless to really learn about the mindset, the approach and the practical way of looking things when it comes to persistence.
>> The REST Report [tbray.org]
Some thoughts about REST in the ecosystem today.
>> How Collaboration Humanizes the Enterprise [daedtech.com]
This piece is both a bit sad and a bit encouraging.
Organizations do inherently run into well-understood issues with scale, but it’s still so very rare to find an organization that is successfully navigating these issues and not just patching them up.
>> For those of you thinking about moving into the test automation field [ontestautomation.com]
Advice worth reading even if you’re not planning to do test automation full time but simply in parallel to your day to day work.
>> Benefits of Serverless Architectures [martinfowler.com]
Continuing the discussion, this piece has a look at the benefits and reasoning behind a Serverless architecture.
>> Baeldung Q2 2016 Report [meta.baeldung.com]
And the quarterly inside look at the numbers of baeldung.com is out.
If you didn’t know, I publish this report regularly giving curious readers an inside look into how the site is doing.
Also worth reading:
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>> Introducing unverified breaches to Have I been pwned [troyhunt.com]
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>> About Inhouse Coderetreat [code-cop.org]
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>> Dynamics of Change: Why Reactivity Matters [queue.acm.org]
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>> Planning for the wrong kind of scale [devblog.avdi.org]
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>> On not knowing [dandreamsofcoding.com]
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>> Getting to grips with cloud computing security on Pluralsight [troyhunt.com]
3. Comics
And my favorite Dilberts of the week:
