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Spring meets Apache Hadoop

SpringSource has just announced the first GA release of Spring for Apache Hadoop. The goal of this project is to simplify the development of Hadoop based applications. You may download ...
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Prime-UI, JAX-RS with Jersey and Gson on Oracle Cloud

The Oracle Cloud is around everywhere these days. It had a rough start with Larry denying the need for a cloud for a very (too) long time and some very early announcements and a very ...
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Your logs are your data: logstash + elasticsearch

Topic of today’s post stays a bit aside from day-to-day coding and development but nonetheless covers a very important subject: our application log files. Our apps do generate ...
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ActiveMQ Clustering, Durable Subscribers, and Virtual Topics to the rescue

So you want to do publish-subscribe with ActiveMQ across distributed topics and be reliable. You can just use durable subscriptions, right? Well, you could, but if you’re using clustering ...
java-interview-questions-answers

Implementing custom Future

Last time we learned the principles behind java.util.concurrent.Future<T>. We also discovered that Future<T> is typically returned by libraries or frameworks. But there ...
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java.util.concurrent.Future basics

Hereby I am starting a series of articles about future concept in programming languages (also known as promises or delays) with a working title: Back to the Future. Futures are very ...
java-interview-questions-answers

JAXB tutorial – Getting Started

What is JAXB? JAXB stands for Java architecture for XML binding.It is used to convert XML to java object and java object to XML.JAXB defines an API for reading and writing Java objects ...
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Hibernate inheritance: Table per class hierarchy

In this tutorial we will see how to implement inheritance in hibernate.There are 3 ways in which you can implement inheritance in hibernate.In this post,we will see one of them i.e.one ...
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How expensive is a method call in Java

We have all been there. Looking at the poorly designed code while listening to the author’s explanations about how one should never sacrifice performance over design. And you just ...
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Analysing a Java Core Dump

In this post, I will show you how you can debug a Java core file to see what caused your JVM to crash. I will be using a core file I generated in my previous post: Generating a Java ...
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