Daniel Kleveros, Author at blog.

600k concurrent websocket connections on AWS using Node.js

Post published:April 13, 2015
Post Author:Daniel Kleveros
Post Category:Cloud / JavaScript

I recently faced the challenge to get as much power as possible out of a AWS EC2 instance at the lowest possible cost using concurrent persistent websockets. To do this…

Creating dynamic reports with JasperReports

Post published:September 18, 2013
Post Author:Daniel Kleveros
Post Category:Java / Tips & Tricks
Post Comments:0 Comments

Problem In my current project we have a requirement that is frequently discussed in the Jasper community. How do I create a dynamic report in JasperReports? The complex detail is…

Testing DAOs using Arquillian

Post published:November 20, 2012
Post Author:Daniel Kleveros
Post Category:Java
Post Comments:5 Comments

Have you been struggling with setting up integration tests for DAOs? We all need to test them, luckily there is a tool helping you to do that and that is…

Have you just purchased a new MacBook Pro with a Retina display? Here is a guide for getting non Retina-Ready applications to display the correct resolution.

Post published:November 11, 2012
Post Author:Daniel Kleveros
Post Category:Tips & Tricks
Post Comments:5 Comments

Summary This blog consists of a guide for making some non Retina-Ready applications to work with the Retina display on a MacBook Pro. After some struggle on getting information on…