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OutOfMemoryError: Java heap space – Analysis and resolution approach

 java.lang.OutOfMemoryError: Java heap problem is one of the most complex problems you can face when supporting or developing complex Java EE applications.This short article ...
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Spring & JSF integration: Pagination

When working with large datasets you often need to present data in a paged format. Pagination is an interesting problem because it tends to cut across all layers of your application, ...
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Spring Testing Support with TestNG

TestNG is a test framework which is designed to cover all categories of tests: unit, functional, end-to-end, integration, (etc). It includes a lot of features such as flexible test ...
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JavaFX 2 GameTutorial Part 3

Introduction This is part 3 of a six part series related to a JavaFX 2 Game Tutorial. If you’ve missed Part 1 and Part 2, I encourage you to go through them before beginning this ...
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Implementing Master Slave / Grid Computing Pattern in Akka

Master Slave pattern is a prime example of fault tolerance and parallel computation. The idea behind the pattern is to partition the work into identical sub tasks which are then delegated ...
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Apache Shiro Part 3 – Cryptography

Besides securing web pages and managing access rights Apache Shiro does also basic cryptography tasks. The framework is able to:encrypt and decrypt data, hash data, generate ...
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Understanding how OSGI bundles get resolved

I’d like to review how OSGI bundles get resolved and use Apache Karaf to demonstrate. Karaf is a full-featured OSGI container based on the Apache Felix kernel and is the corner stone ...
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XML unmarshalling benchmark: JAXB vs STax vs Woodstox

Introduction Towards the end of last week I started thinking how to deal with large amounts of XML data in a resource-friendly way.The main problem that I wanted to solve was how ...
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Processing 10 million messages with Akka

Akka Actors promise concurrency. What better way to simulate that and see if how much time it takes to process 10 million messages using commodity hardware and software without any ...
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Functional style in Java with predicates – Part 2

In the first part of this article we introduced predicates, which bring some of the benefits of functional programming to object-oriented languages such as Java, through a simple interface ...
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