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Reducing memory usage with String.intern()

Every now and then you have a dying production application at hand. And you know you need to patch it as fast as possible. So have we, and thought it would be interesting to share one ...
java-interview-questions-answers

Developing SOAP Web service using Apache CXF

In last post I walked through the steps for developing a simple RESTFull service using apache CXF.  In this post I will be talking about developing SOAP web service using CXF. Before ...
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Making Sense Out of Datomic, The Revolutionary Non-NoSQL Database

I have finally managed to understand one of the most unusual databases of today, Datomic, and would like to share it with you. Thanks to Stuart Halloway and his workshop! Why? Why?!? As ...
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Distributed System Development Considerations

There are a number of factors to take into account while developing distributed software systems. If you don’t even know what I am talking about in the first sentence then let me ...
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Akka vs Storm

I was recently working a bit with Twitter’s Storm, and it got me wondering, how does it compare to another high-performance, concurrent-data-processing framework, Akka. What’s Akka ...
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Garbage Collection in Java (2)

Parallel Scavenge Today we cover how Parallel GC works. Specifically this is the combination of running a Parallel Scavenge collector over Eden and the Parallel Mark and Sweep collector ...
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MongoDB Primary Keys Are Your Friend

All documents in a MongoDB collection have a primary key dubbed _id. This field is automatically assigned to a document upon insert, so there’s rarely a need to provide it. What’s ...
java-interview-questions-answers

Blog Categorisation using Encog, ROME, JSoup and Google Guava

Continuing with Programming Collection Intelligence  (PCI) the next exercise was using the distance scores to pigeonhole a list of blogs based on the words used within the relevant ...
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Screaming fast Lucene searches using C++ via JNI

At the end of the day, when Lucene executes a query, after the initial setup the true hot-spot is usually rather basic code that decodes sequential blocks of integer docIDs, term frequencies ...
spring-interview-questions-answers

Spring MVC Error handling flow

There are broadly three ways of handling an exception flow using Spring MVC, the objective being to intercept any application exception and present a friendly and informative view back ...
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