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Making Sense Out of Datomic, The Revolutionary Non-NoSQL Database

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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 we shall see shortly, Datomic is very different from the traditional RDBMS databases as well as the various NoSQL databases. It even isn’t a database – it ...

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Introduction to Cloud Computing

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Cloud Computing is a delivery of computing as a service rather than a product. I will come back to this after a few lines of introduction. Still then stay put. Introduction In very recent past if a company decided to create and host an application they would need to do following: Traditional infrastructure   Create a physical infrastructure Layer – ...

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Distributed System Development Considerations

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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 give you some insight, examples and for instances of what distributed systems are. Overview A distributed system is when multiple physical hardware devices interact with separate and discrete users and collaborate together through these ...

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Add a sliding menu with animation to an Activity

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I was playing around with animation, layers and so on and i have coded this simple sliding menu. The idea is very simple when user touches the screen and moves up his finger the app shows a menu, when user touches the screen and moves down his finger this menu disappear. As you can see the idea is very simple ...

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Android AsyncTask ListView – JSON

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Many times we need to populate a Listview using an AsyncTask. This is the case when we have to invoke a remote server and exchange information using JSON. In this post i want to go a bit deeper in the ListView analysis . In the previous posts, i described how to use ListView in several ways using standard and custom ...

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Akka vs Storm

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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 and Storm? Let’s start with a short description of both systems. Storm is a distributed, real-time computation system. On a Storm cluster, you execute topologies, which process streams of tuples (data). Each topology is ...

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Android ListView Pull-to-Refresh

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In this post I want to describe how to create a custom ListView widget that behaves like Gmail list, so that when you slide down and you are at the top of the list it will be refreshed. This new UI pattern is knows as Pull-to-refresh. There are several implementation of it this is my own version. To have this ...

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Garbage Collection in Java (2)

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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 over the Tenured generation. You can get this option by passing in -XX:+UseParallelOldGC though its the default on certain machine types. You may want to read my first blog post on ...

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8 Things you should not be afraid of as a Developer

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Change In Software Development there is no such thing as stagnancy. Everything you develop now is just another version of a component that will probably change in the future. Change is the most common thing in Software Development, and you’re better of accepting it as a fact. Expect future changes to everything you develop, and therefor design your Code more ...

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Android – Import projects from Git

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There are many cases when we have requirement and need to clone Git repository, at that time we have to clone repository by using Git Client, FYI I have installed Git GUI client on my windows machine. By cloning this way, we have to import those project into eclipse manually. Now, What if there is a way directly by which ...

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