Programming « Server Çimen

Introduction to OSGI Declarative Services using Apache Felix

I took a look at OSGI DS and was curios about how to create a hello world bundle to run on Apache Felix. After a little search i decided that it would be a good opportunity to learn basics of maven 2. I checked out one of the projects at apache incubator svn and seeing [...]

Character Comparison Problem – Python

I realized in some part of a program of mine following statements print False:

#coding = utf-8
turkishConsonants = ['b', 'c', 'ç', 'd','f','g','ğ','h','j','k','l','m',
'n','p','r','s','ş','t','v','y','z']
word = “ağla”
print word[-3] in turkishConsonants

The reason for this was the letter ‘ğ’ is stored as two array elements and word[-3] returns only half of it.
Proper way to make comparison is [...]

Custom Java Events

To create custom Java events we need basicly three classes:

The event class which will be fired
An interface which indicating responsibility of event listeners of this event
The class which fires the Java events

When these classes are prepared, other classes can subscribe to events by providing their event listener.

An event class must extend java.util.EventObject class. Below you [...]

Basketball Game: Robot (www.onlinegames.com/basketball/)

I have coded another helper program to a popular game using Robot class of Java. In this game, players are trying to score baskets in a 2d pitch by shooting the ball random positions to a basket of which position remains unchanged. The players only decide highest point of the path of the ball. By [...]

DL – Safe SWRL Rules on OWL DL Ontologies with Pellet

Here is a simple example to understand the meaning of DL Safety.

In a DL Safe rule execution, only explicitly named individuals are bound to the variables in the rule.

Lets say we have a transitive object property named ancestorOf.

Can we simulate this transitivity using a DL-Safe SWRL rule rather than defining the ancestorOf property as transitive?

At [...]

Setting Java Character Encoding

When operations on different character sets need to be done in Java, we need to initialize JVM with required options.

First lets have a look at basics of java character encodings.

Internally the JVM always operates with Unicode.
Data transferred in or out of the JVM is converted to a format specified in the file.encoding property of the [...]

BlazeDS - Remote Object Service Tutorial

Remoting Object Service of BlazeDS , is used for making remote procedure calls from Flex applications to Java Server.

Having BlazeDS deployed on an application server (Tomcat is used here) , following steps shows the server and client side coding for a simple scenario where a flex application is used to display instances of Person and [...]

Farmville: Clicking Robot

Too many clicks are needed while playing games like farmville. To this automatically, firstly I used a tool named xdotools which generates false keyboard and mouse input. But, since xdotools only supports X11, I switched to Java to have a platform independent program.

java.awt.Robot class can be used to generate false input in Java. You can [...]

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