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Javascript for Java Developers


This post will go over the Javascript language from the point of view of a Java developer, focusing on the differences between the two languages and the frequent pain points. We will go over the following:                 Objects Only, No Classes Functions are just Values The ‘this’ Keyword Classic vs Prototypal Inheritance Constructors ...

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MineCraft and off heap memory


Overview MineCraft is a really good example of when off heap memory can really help. The key requirements are: The bulk of the retained data is a simple data structure (in minecraft’s case its lots of byte[]) The usage of off heap memory can be hidden in abstraction.     The test I used the following test for starting minecraft ...

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Java Build Tools: Ant vs Maven vs Gradle


In the beginning there was Make as the only build tool available. Later on it was improved with GNU Make. However, since then our needs increased and, as a result, build tools evolved. JVM ecosystem is dominated with three build tools: Apache Ant with Ivy Maven Gradle   Ant with Ivy Ant was the first among “modern” build tools. In ...

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NoSQL on Android


There are various NoSQL solutions for mobile platforms such as the iOS and Android. Here, we will look at Couchbase Lite (CBL – the successor of TouchDB), a lightweight, full-featured, embedded JSON database. Why a full-feature database instead of just a wrapper for a cloud service? Basically, responsiveness. The idea is that the application should always be available to users ...

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SpringSource Certified Spring Professional


When I first heard about this certification I was really excited and wanted to find out what I can about this exam before I start any initiative to pass it. What I found however was the complete lack of resources, guides, information or mock exams of any kind. The only reasonable resource online I was able to find before my ...

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An Alternative to the Twitter River – Index Tweets in Elasticsearch with Logstash


For some time now I’ve been using the Elasticsearch Twitter river for streaming conference tweets to Elasticsearch. The river runs on an Elasticsearch node, tracks the Twitter streaming API for keywords and directly indexes the documents in Elasticsearch. As the rivers are about to be deprecated it is time to move on to the recommended replacement: Logstash. With Logstash the ...

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Database primary key flavors


Types of primary keys All database tables must have one primary key column. The primary key uniquely identifies a row within a table therefore it’s bound by the following constraints: UNIQUE NOT NULL IMMUTABLE When choosing a primary key we must take into consideration the following aspects:   the primary key may be used for joining other tables through a ...

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Interfacing Salesforce with Android


In this article we are going to explore building a simple native Android application that utilizes the Chatter REST API within the Salesforce Platform. To accomplish this, we will use the Salesforce Mobile SDK 2.1, which acts as a wrapper for low-level HTTP functions, allowing us to easily handle OAuth and subsequent REST API calls. The TemplateApp provided in the ...

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Fabric8 HTTP Gateway


I recently put together a quick Github project to show the Fabric8 HTTP gateway in action. It shows a sample project that you can use to test out the HTTP Gateway. The example/camel/cxf profile that comes with Fabric8 basically does the same thing now. Fabric8 Gateway The Fabric8 project — pronounced fabricate — is a practical DevOps framework for services ...

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