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Java, Scala, Guava and Trove Collections – How Much Data Can They Hold?

 One of the fascinating things about our data structures is that even though we’re so familiar with them, it’s still hard for us to tell exactly how many items something as basic ...
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Finding long tail suggestions using Lucene’s new FreeTextSuggester

Lucene’s suggest module offers a number of fun auto-suggest implementations to give a user live search suggestions as they type each character into a search box. For example, ...
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Java memory model is back

The Java memory model has been forgotten for more than nine years, but most open source Java supporters want to modernize it and focus on concurrency, as introduced in Java memory model ...
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Continuous Delivery for Heroku With Jenkins

A continuous delivery pipeline that leverages Jenkins and targets Heroku is fairly simple to set up, provided you install the Jenkins Git plugin. With this pipeline, changes to a specific ...
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Which is better option: Cloning or Copy constructors?

Here is how I started writing this article. I have read this statement so many times: “Cloning becomes difficult when the object has references to mutable final fields.” And every ...
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Simple Message Queue using Redis

In this posts we will use Redis as a simple message queue, using list commands. Let’s say we have an application that allows the users to upload a photo. Then in the application we ...
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What’s new in Spring

Let’s check on some new releases announced by the Spring community over the previous days:Spring Boot 1.0.0.RC1 Spring was pleased to announce the first release candidate of ...
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Proof-of-Concept Using Spring Roo

In my time with Keyhole, I’ve been involved in a number of projects where the client was asking us to rewrite a legacy system while retaining their existing database. Sometimes it ...
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TestNG: Run tests sequentially with @DataProvider inside one test class

Many java developers and automation test engineers use TestNG as a testing framework in their job. I’m not an exception. This is an obvious choice because TestNG provides very powerful ...
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Drools : PHREAK Stack Based Evaluations and Backward Chaining

A while back I wrote a blog on our new algorithm: http://blog.athico.com/2013/11/rip-rete-time-to-get-phreaky.html Someone asked me about the new stack based system, and how backward ...
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