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NUMA architecture and Java

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Time to deploy your application, looking forward to procure hardware that suits best to the load requirements. Boxes with 40 cores or 80 cores are pretty common these days. General conception is more cores, more processing power, more throughput. But I have seen a little contrary results, showing a small cpu-intensive test run performs slower on 80 core box than ...

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JavaFX Game (Connect Four)

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This is my first JavaFX game tutorial and my first blog post about JavaFX panel. I made this connect four game with just 200+ lines of code just enough for a simple game. I used the GridPane panel here to lay out the disks, GridPane is one of the JavaFX layout pane but it is different from the other pane ...

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Testing client side of RESTful services

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Develop an application that uses RESTful web API may imply developing server and client side. Writing integration tests for server side can be as easy as using Arquillian to start up server and REST-assured to test that the services works as expected. The problem is how to test the client side. In this post we are going to see how ...

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Is Java Dead or Invincible?

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Writer Isaac Asimov once said that ‘the only constant is change’. That isn’t just a phrase in the software industry, it is an absolute fact. Once, there was a day when Corba was king but it was usurped by Web Services. Even within the world of Web Services, that used to be all about SOAP but now it’s REST style ...

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JCG Flashback – 2011 – W38

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Hello guys, Time for another post in the JCG Flashback series. These posts will take you back in time and list the hot articles on Java Code Geeks from one year ago. So, let’s see what was popular back then: 5. Configuration Management in Java EE This article discusses configuration management in a Java EE environment and examines the various ...

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Spring Testing Support and Context caching

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Spring provides a comprehensive support for unit and integration testing – through annotations to load up a Spring application context, integrate with unit testing frameworks like JUnit and TestNG. Since loading up a large application context for every test takes time, Spring intelligently caches the application context for a test suite – typically when we execute tests for a project, ...

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Spring MVC 3 Template and Apache Tiles

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An efficient design consideration for any web application is the use of a template engine (or tool), and with Spring’s “pluggable” nature, it is indeed much more easier to integrate template mechanisms such as Apache Tiles. In this simple post, I will give you a brief intro and basics of using Tiles as a Template engine for your Web Application! ...

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Chain Of Responsibility Design Pattern Example

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Avoid coupling the sender of a request to the receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it. The main intention in Chain Of Responsibility is to decouple the origin of the request and the handling of the request such ...

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Use Cases for Iterative Development

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Almost everything I’ve read about use cases focuses on describing what needs to be added to your product. Agile development says “get it working first, make it better second.” That means changing the way the software enables a user to do something they can already do. How do you manage requirements for incremental improvement? Iterative Development and Incremental Improvement Iterative ...

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Transparent JFrame using JNA

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In Make JFrame transparent I had shown a way to making frame’s transparent using AWTUtilities class. But using that class results in access restriction compile time error, resolution in Eclipse is also shown in that post. Now here is the version using java natives. I have used Java Native Access (JNA) library to call native functions to get the things ...

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