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Splitting Large XML Files in Java

Last week I was asked to write something in Java that is able to split a single 30GB XML file into smaller parts of configurable file size. The consumer of the file is going to be a ...
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State Design Pattern in Java – Example Tutorial

State pattern is one of the behavioral design pattern. State design pattern is used when an Object change it’s behavior based on it’s internal state. If we have to change the behavior ...
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Strategy Design Pattern in Java – Example Tutorial

Strategy pattern is one of the behavioral design pattern. Strategy pattern is used when we have multiple algorithm for a specific task and client decides the actual implementation to ...
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Scalable real time state update with Storm

In this post, I illustrate how to maintain in DB the current state of a real time event-driven process in a scalable and lock free manner thanks to the Storm framework. Storm is an ...
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EJB passivation and activation example

In this tutorial we are going to see how activation and passivation works in a Stateful Java Enterprise Session Bean. 1. Introduction Stateful Session Beans usually hold information ...
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Template Method Design Pattern in Java

Template Method is a behavioral design pattern and it’s used to create a method stub and deferring some of the steps of implementation to the subclasses. Template method defines the ...
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Visitor Design Pattern in Java – Example Tutorial

Visitor Pattern is one of the behavioral design pattern. Visitor pattern is used when we have to perform an operation on a group of similar kind of Objects. With the help of visitor ...
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Two TCKs for Eclipse – What is really in it for Open Source?

Back in May Oracle awarded a Compatibility Testing Scholarship to the Eclipse Foundation. This got some attention in media during the last days and I just wanted to make sure that I ...
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Transparently persist and retrieve encrypted data from database

It’s over two months since my last post here but June and July were extremely busy and intensive months this year. First, organisation of Confitura (the biggest free conference for ...
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Java EE Stateful Session Bean (EJB) example

In this article we are going to see how you can use Stateful Session Beans to keep track of state across a client Session in a simple Web Application. 1. Introduction Stateful Session ...
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