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Big Data… Is Hadoop the good way to start?

In the past 2 years, I have met many developers, architects that are working on “big data” projects. This sounds amazing, but quite often the truth is not that amazing. TL;TR You believe that you have a big data project?           Do not start with the installation of an Hadoop Cluster — the “how“ Start to ...

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Testing secured EJBs with Arquillian

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Testing secured EJBs has been historically hard to get right. Up until now, I have been using proprietary techniques like JBossLoginContextFactory described in the article Testing secured EJBs on WildFly 8.1.x with Arquillian to test secured EJBs. During this year Devoxx, David Blevins, founder of the Apache TomEE project – a lightweight Java EE Application Server, brought to my knowledge ...

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Java performance tuning survey results (part III)

This is the third post in a series where we analyze the results of a survey conducted in October 2014. If you have not already done so, I recommend to start with the first two posts in the series: problem severity analysis and monitoring domain analysis. This post focuses on troubleshooting / root cause detection. The background to this survey ...

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The Actual vs Plan Dichotomy

I’ve once worked for the IT department of a large restaurant network. They had a secret sauce, and this wasn’t one you could eat. In a restaurant kitchen, when a customer orders a dish on the menu you have to cook it. You take the recipe with a list of ingredients and their quantities, and you prepare the dish by ...

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Scala snippets 1: Folding

Coming from a Java background, Scala provides lots of nice features and libraries that allow you to create nice and concise code. Wrapping your head around these concepts though, can be hard. In this short series of articles I’ll walk through some of the concepts behind scala, and show you how you can use the various concepts. There is no ...

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Three Ways To Become a Better Software Professional

The other day InfoQ posted an article on software craftsmanship. In my view, software craftsmanship is no more or less than being a good professional. Here are three main ways to become one. 1. See the Big Picture Let’s start with why. Software rules the world and thus we rule the world. And we all know that with great power ...

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Need micro caching? Memoization to the rescue

Caching solves wide sort of performance problems. There are many ways to integrate caching into our applications. For example when we use Spring there is easy to [email protected] support. Quite easy but we still have to configure cache manager, cache regions, etc. Sometimes it’s unfortunately like taking a sledgehammer to crack a nut. So what can we do to “go lighter”? ...

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DevOps Equals DevOps Principles Plus DevOps Practices

Successful, long-lasting movement have a clear manifesto outlining goals and principles.   Many DevOps adopters may not be aware of the DevOps Manifesto (created by Jez Humble @jezhumble)  nor how successful DevOps requires keeping a clear focus on principles, practices, and value (instead of infrastructure tooling. DevOps Principles DevOps value is derived in the core principles that started the movement: ...

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Getting Started with Apache Cassandra and Java (Part I)

On this page, you’ll learn just enough to get started with NoSQL Apache Cassandra and Java, including how to install, try out some basic commands and what to do next. Requirements To follow this tutorial, you should already have a running Cassandra instance, and have gone through the 10 minute walkthrough here: http://planetcassandra.org/create-a-keyspace-and-table/. If you’ve already reviewed part I, be ...

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Gradle Goodness: Using CopySpec with Tasks

To define a Copy task we specify the files we want to copy and to which directory. This definition is a CopySpec instance. It contains the rules that defines what we want to copy. The archive tasks Jar, Zip and Tar also use a CopySpec instance. When we create a task of type Copy we get a task object that ...

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