Apache Shiro Part 1 – Basics

Apache Shiro, originally called JSecurity, is Java security framework. It was accepted and became Apache top level project in 2010.…

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MapReduce Questions and Answers Part 2

4 Inverting Indexing for Text Retrieval The chapter contains a lot of details about integer numbers encoding and compression. Since…

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MapReduce Questions and Answers Part 1

With all the hype and buzz surrounding NoSQL, I decided to have a look at it. I quickly found that…

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AppSensor – Intrusion Detection

Imagine that you have created a nice web application and secured it to your best. Users came, used it and…

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Secure Encryption in Java

Last time I wrote about cryptography, I outlined Apache Shiro crypto API and shown how to use its two symmetric…

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ANTLR Tutorial – Hello Word

Antlr stands for ANother Tool for Language Recognition. The tool is able to generate compiler or interpreter for any computer…

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JNDI and JPA without J2EE Container

We wanted to test some JPA code with as simple setup as possible. The plan was to use only Java…

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