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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 ...
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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 ...
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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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Working with Amazon Simple Queue Service using java

Amazon Simple Queue Service or SQS is a highly scalable hosted messaging queue provided by Amazon Webservice stack. Amazon SQS can be used to completely decouple operations of different ...
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Garbage Collection in Java (1)

This is the first in a series of posts about Garbage Collection (GC). I hope to be able to cover a bit of theory and all the major collectors in the hotspot virtual machine over the ...
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