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ActiveMQ: Understanding Memory Usage

As indicated by some recent mailing list emails and a lot of info returned from Google, ActiveMQ’s SystemUsage and particularly the MemoryUsage functionality has left some people ...
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Session Timeout Handling on JSF AJAX request

Session Timeout Handling on JSF AJAX request When we develop JSF application with AJAX behaviour, we may experience the problem in handling timeout scenario of Ajax request. For example, ...
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Google Guava EventBus and Java 7 WatchService for Event Programming

This post is going to cover using the Guava EventBus to publish changes to a directory or sub-directories detected by the Java 7 WatchService. The Guava EventBus is a great way to add ...
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Google Guava MultiMaps

Guava? This is the first in a series of posts where I’ll be attempting to explain and explore Google’s awesome Guava java library. I first came across Guava whilst searching ...
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Calculating A Co-Occurrence Matrix with Hadoop

This post continues with our series of implementing the MapReduce algorithms found in the Data-Intensive Text Processing with MapReduce book. This time we will be creating a word co-occurrence ...
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Forcing Tomcat to log through SLF4J/Logback

So you have your executable web application in JAR with bundled Tomcat (make sure to read that one first). However there are these annoying Tomcat logs at the beginning, independent ...
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Event streaming with MongoDB

MongoDB is a really great “NoSQL” database, with a very wide range of applications. In one project that we are developing at SoftwareMill, we used it as a replicated event storage, ...
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How cool is integration testing with Spring and Hibernate

I am guilty of not writing integration testing (At least for database related transactions) up until now. So in order to eradicate the guilt i read up on how one can achieve this with ...
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SQL Injection in Java Application

In this post we will discuss what is an SQL Injection attack. and how its may affect any web application its use the back end database. Here i concentrate on java web application. ...
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Database Encryption Using JPA Listeners

I recently had to add database encryption to a few fields and discovered a lot of bad advice out there. Architectural Issues The biggest problem is architectural. If your persistence ...
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