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Using Cryptography in Java Applications

This post describes how to use the Java Cryptography Architecture (JCA) that allows you to use cryptographic services in your applications. Java Cryptography Architecture Services The ...
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Google Guava MultiMaps

Guava? This is the first in a series of posts where I’ll be attempting to explain and explore Google’s awesome Guava java library. I first came across Guava whilst searching ...
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How much memory do I need

What is retained heap? How much memory will I need? This is a question you might have asked yourself (or others) when building a solution, creating a data structure or choosing an algorithm. ...
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Calculating A Co-Occurrence Matrix with Hadoop

This post continues with our series of implementing the MapReduce algorithms found in the Data-Intensive Text Processing with MapReduce book. This time we will be creating a word co-occurrence ...
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When using direct memory can be faster

Overview Using direct memory is no guarantee of improving performance.  Given it adds complexity, it should be avoided unless you have a compelling reason to use it. This excellent ...
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Forcing Tomcat to log through SLF4J/Logback

So you have your executable web application in JAR with bundled Tomcat (make sure to read that one first). However there are these annoying Tomcat logs at the beginning, independent ...
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Event streaming with MongoDB

MongoDB is a really great “NoSQL” database, with a very wide range of applications. In one project that we are developing at SoftwareMill, we used it as a replicated event storage, ...
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Type-safe Empty Collections in Java

I have blogged before on the utility of the Java Collections class and have specifically blogged on Using Collections Methods emptyList(), emptyMap(), and emptySet(). In this post, ...
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How cool is integration testing with Spring and Hibernate

I am guilty of not writing integration testing (At least for database related transactions) up until now. So in order to eradicate the guilt i read up on how one can achieve this with ...
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Working Efficiently with JUnit in Eclipse

Recently I was dragged into a discussion1 with some test infected2 fellows about how we use JUnit within the Eclipse IDE. Surprisingly the conversation brought up some ‘tips and tricks’ ...
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