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Web Applications

While parts of the cloud IT that are still being hyped are changing rapidly, the whole segment is not past the hype yet. The cloud report [1] that Gartner published 9 months ago still holds true today. Reports of disillusioned customers of such solutions [2][3] are a clear sign that the hype might have reached its peak for most parts of cloud offerings, though. And while many articles discuss the...
on Mar 30, 2014

Web Services and XML

It actually happened a few weeks ago already, but I simply didn't find the time to spread the word earlier -- just too much other stuff to do (see end of posting), so I tell you now: WebDAV Support for JAX-RS 1.2 is out! What has happened since 1.1? First of all, 1.2 is a complete internal overhaul, which not only finally is covered with unit tests rather completely (which revealed several...
on Mar 1, 2014

Community

What is Java? Java is an high-level programming language created by James Gosling from Sun Microsystems on 1991, released on 1995. Nowadays, Oracle Corporation has the steermanship for Java. Its license is GNU General Public License (GPL). Is executed on more than 850 millions of devices on all over the world. Java applications are compiled to bytecode that can run on any Java Virtual Machine (...
on Jan 30, 2014
Introduction to Class Diagram In any project's planning phase, the programmer should describe the behaviour of the different objects that are required to satisfy business use cases. However objects can't emerge from nothing, so you need a template that describe the type of objects that the system will have. As a result, you will need to show a diagram with all the classes involved and their...
on Jan 22, 2014
Why do we need to program? Technology is part of our life. The world is changing daily and everything is getting automated. Learn to program is the creative way we can take our ideas to the next level and express solutions to society. By designing programs, we learn several abilities like critical reading, analytical thinking and create synthesis. The programmer defines the problem, plans a...
on Jan 21, 2014
Spring is an open source framework whose goals is facilitate the Java developer's life, it began with dependency injection and nowadays works on many plug-ins. Plug-ins such Spring Social, to connects social media like twitter and facebbok, Spring security beyond control inversion. The goal of this post is talk about Spring Data working with Cassandra. Spring Data does part of Spring plug-in,...
on Aug 25, 2013
   In last week was born the SouJavaLivre in Brazil, its main objective is disseminating and help to envolve the java free and  the OpenJDK in country. For does that there are some sub-projects:    Support to Adopt OpenJDK : With list in Portuguese also some tutorial in Portuguese to help the people to adopt the JVM's reference, but helping and with integration...
on Jan 22, 2013
Has been 1 year, after the Oracle vs Google saga, and I hear there will be appeal.. I am personally dunno what is appeal mean, i know sex appeal. huahua.. yes, I try to learn another tech and dedicate my time less to Java, touching NodeJS, try-ing Cloud, and yes, spending my time to my old hobbyes far become computer came to my life, fish tropical breeding. I live in emerging country, which...
on Oct 12, 2012

Programming

One day I found myself in the situation that I had to write a unit test which checks whether my code is annotated in a particular way. I wondered how one could do that without doing an integration test that actually processes that annotations. My first idea was to use the Reflection API, which in fact worked, but was not looking smart. In fact, I wanted to have a Hamcrest matcher instead, since...
on Dec 27, 2013
In this post we will be looking at code for a system designed to integrate all of the devices used to provide surveillance and security to extensive physical premises such as malls, campuses, and industrial parks. The approach I am taking involves the actor paradigm and the Java programming language. The selection of actors for this type of application is based on a number of...
on Nov 30, 2013

JavaOne

I was very pleased to see the JFrog team take me up on my suggestion early this year that "Maybe the JFrog team will consider giving a presentation on how they put all this together at JavaOne this September". Unfortunately for me, the session (Building a Massively Scalable Cloud Service from the Ground Up) was already filled to capacity as I walked up to the door, so I was unable to attend....
on Dec 8, 2013

Education

This post introduces a new Java actor based open source sub-project of the project "Learning Actors in Java". This work will develop a premises guardian system. A premises guardian system is a distributed application whose purpose is to support the physical protection of premises such as office buildings, campuses, apartment complexes, shopping malls, etc. Protecting information...
on Nov 20, 2013
Introduction Configuration of an actor system affects the way in which the Akka actor libraries and microkernel interact with actors. The visibility of a configuration is limited to the specific actor system with which the configuration has been associated. The effective configuration for any given actor system is a merger of three sources. In Fig. 1 below the precedence of...
on Oct 30, 2013

Extreme Programming

Have you experienced Scrum? "agile" development? I have.
on Oct 17, 2013

GUI

#How to run the dev test cases ================================ #Annotation: All of the test cases can't be ran on the windows platform because the firefox can't support the ajax and JSF based on the windows platform very well. If you want to ran the tests, please check out all of the codes to the linux, ubuntu or mac platform. #Steps: 1). Download the firefox and install it, On my platform, I...
on Oct 14, 2013
Swing is not dead, still. While a whole lot of evangelists try to talk it dead, it is still part of the JRE. While SWT is not, still. And while JavaFX is not, still. Dispite all hypes and rumors. It is not even declared to be deprecated or obsolete. So in fact, there is no other real alternative to Swing as long as the GUI must work solely with JRE means (I won't say AWT is an alternative). And...
on Sep 7, 2012

Open Source

The 15th anniversary of OSCON showed its interest in diversity, and continuing to broaden the market for open source technology. I saw a lot of discussions on how to get people interested, and keep people involved. It was remarkably open to all sorts of ideas on how to keep open source going into the future. I started with Tim Berglund’s GitHub Power Tools, which was filled with people who had...
on Jul 30, 2013
OSCON 2013 (Open Source CONvention) is underway in Portland, Oregon. Even if you can't be there, you can still participate by watching the keynote sessions, which will be live-streamed on Wednesday, Thursday, and Friday. While all the keynotes are likely to be quite good (I found them to be so when I was at OSCON some years ago), several keynotes in particular stand out for me (all times are US...
on Jul 23, 2013

Servlets

Have you wanted to do something with asynchronous I/O? I did. After doing some work with Node.js, I wanted to find a way to get some of the goodness of its programming model for Java. The Acteur project is the result - a framework for building scalable, asynchronous web applications using Netty + Guice - was the result. The programming model is a little unusual - you treat constructors as...
on Apr 7, 2013

J2EE

Not so long ago Mark Halvorson mentioned in his presentation at the Magnolia Conference 2012 that he doesn't understand why he can't have versioning for templates in Magnolia the same way he has it for content. Then I thought why not? Should be pretty straightforward. The first implementation was indeed easy. Similar to what Magnolia does when dealing with DMS documents - I just configured a...
on Nov 7, 2012