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Don’t Miss out on Writing Java 8 SQL One-Liners with jOOλ or jOOQ

More and more people are catching up with the latest update to our platform by adopting functional programming also for their businesses. At Data Geekery, we’re using Java 8 for our ...
java-interview-questions-answers

Jar Hell made Easy – Demystifying the classpath with jHades

Some of the hardest problems a Java Developer will ever have to face are classpath errors: ClassNotFoundException, NoClassDefFoundError, Jar Hell, Xerces Hell and company. In this post ...
java-interview-questions-answers

Java EE 7 with Angular JS – CRUD, REST, Validations – Part 2

This is the promised follow up to the Java EE 7 with Angular JS – Part 1. It took longer than I expect (to find the time to prepare the code and blog post), but it’s finally here! The ...
java-interview-questions-answers

Kafka Benchmark on Chronicle Queue

Overview I was recently asked to compare the performance of Kafka with Chronicle Queue.  No two products are exactly alike, and performing a fair comparison is not easy.  We can try ...
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How to connect to MongoDB from a Java EE stateless application

In this post I will present how to connect to MongoDB from a stateless Java EE application, to take advantage of the built-in pool of connections to the database offered by the MongoDB ...
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Reducing the frequency of major GC pauses

This post will discuss a technique to reduce the burden garbage collection pauses put on the latency of your application. As I have written couple of years ago, disabling garbage collection ...
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Dead simple configuration

Whole frameworks have been written with the purpose of handling the configuration of your application. I prefer a simpler way. If by configuration we mean “everything that is likely ...
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Akka Notes – Actor Logging and Testing

In the first two parts (one, two), we briefly talked about Actors and how messaging works. In this part, let’s look at fixing up Logging and Testing our TeacherActor. Recap This ...
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Neo4j: COLLECTing multiple values

One of my favourite functions in Neo4j’s cypher query language is COLLECT which allows us to group items into an array for later consumption. However, I’ve noticed that people sometimes ...
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Spring WebApplicationInitializer and ApplicationContextInitializer confusion

These are two concepts that I mix up occasionally – a WebApplicationInitializer and an ApplicationContextInitializer, and wanted to describe each of them to clarify them for myself. I ...
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