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How is ThreadLocal implemented?

This is a follow-up to my last week post, where I explained the motivation behind ThreadLocal usage. From the post we could recall that ThreadLocal is indeed a cool concept if you wish ...
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KIE-WB / JBPM Console Ng – Configurations

Hi all, this is a follow up post from my previous entry about how to use the jBPM Console. The main idea of this post is to describe some of the most common configurations that you ...
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Sending a mail in Java (and Android) with Apache Commons Net SMTP : STARTTLS, SSL

Recently working on an Android experiment, I wanted to send emails using a SMTP server, using authentication and encryption, from an android app. Well, I found out that javax.mail on ...
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Efficiently delete data with JPA and Hibernate

You may come to the situation where you have to perform a bulk deletion on a huge amount of datasets stored in a relational database. If you use JPA with Hibernate as underlying OR ...
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Exploring Spring Controller with Spring Form Tag

In the past article, I have shown you how to process an plain HTML form with Spring controller. But a more powerful way to process form is to use Spring’s @ModelAttribute and its ...
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What is your structure of JEE based web projects?

In this post I will try to discuss diverse organization structures of web based projects, mostly with JSF. The first thought when starting a new project is how to organize my Java packages? ...
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Java implementation of Optimal String Alignment

For a while, I’ve used the Apache Commons lang StringUtils implementation of Levenshtein distance.  It implements a few well known tricks to use less memory by only hanging on ...
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Getting Started with Hazelcast

In July I wrote a blog introducing erlang to Java developers, highlighting some of the similarities and differences between the two languages. The erlang virtual machine has a number ...
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Coordination and service discovery with Apache Zookeeper

Service-oriented design has proven to be a successful solution for a huge variety of different distributed systems. When used properly, it has a lot of benefits. But as number of services ...
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What are Reentrant Locks?

In Java 5.0 a new addition was made to enhance the intrinsic locking capabilities, called as Reentrant Lock. Prior to this, ‘synchronized’ and ‘volatile’ were the means for ...
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