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Java Concurrency Tutorial – Reentrant Locks

Java’s synchronized keyword is a wonderful tool – it allows us a simple and reliable way to synchronize access to critical sections and it’s not too hard to understand. But sometimes ...
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Mapping Objects to Multiple XML Schemas – Weather Example

I have written previous posts on EclipseLink JAXB (MOXy)‘s @XmlPath and external binding file extensions. In this post I will demonstrate how powerful these extensions are by ...
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Java Concurrency Tutorial – Semaphores

This is the first part in a series that we’re going to be doing on Java concurrency. Specifically, we are going to dive into the concurrency tools built into Java 1.5 and beyond. ...
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The Java Logging Mess

Every application needs logging. And right now there are a lot of options on what exactly to use for logging in Java. The most famous frameworks are: log4j, logback, commons-logging, ...
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Simple Twitter: Play Framework, AJAX, CRUD on Heroku

So the big announcement is out – Heroku started offering native support to Play Framework applications! If you haven’t heard it, checkout the post from Jesper Joergensen on ...
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The Exchanger and GC-less Java

Overview The Exchanger class is very efficient at passing work between thread and recycling the objects used. AFAIK, It is also one of the least used Concurrency classes. Nevertheless, ...
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Spring Declarative Transactions Example

A transaction is a unit of work that has ACID (atomic, consistent, isolated and durable) properties. Atomic means that the changes all happen or nothing happens. If money is debited ...
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Real modular web applications: Why there is no standard for developing them?

OSGI, SpringSource, Jboss Modules, J2EE and the list never ends.All these technologies promise to their end users/developers the same thing which is more or less java modular web applications ...
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The OpenJDK as the default Java on Linux

Hi All, Recently I’ve received a bunch of private correspondence from people confused/worried over the change in the default Java packaging for Linux. For many Linux distributions, ...
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Google ClientLogin Utility in Java

Authentication and Authorization for Google APIs is a common feature in today’s applications requiring integration and information exchange with Google services. While most of this ...
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