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Java EE 7 Petclinic

A Java EE 7 Version of Spring Petclinic.

Depending on JSF and EJB and ready to run on JBoss WildFly and Oracle Glassfish.

You find a running Version with WildFly on OpenShift, the RedHat Cloud:

Source Code ist hosted on Github:

The Domain Modell  contains all basic Relationships between Entities like OneToMany, ManyToOne and also ManyToMany:

Pageflow  is complex enough to be interesting for Functional Tests with Selenium2 Webdriver, Arquillian Drone and Graphene:

Use Cases

Some Example Screen Shots

install JBoss Wildfly install JBoss Wildfly 8.0.0.Final from
to e.g. /Users/tw/srv/wildfly-8.0.0.Final/

start JBoss by: cd /Users/tw/srv/wildfly-8.0.0.Final/bin ; ./
install Glassfish 4 I installed Netbeans 7.4 with Glassfish 4.0 from
starting on Mac OSX:
cd /Applications/NetBeans/glassfish-4.0/bin/
./asadmin start-data…

TYPO3 Barcamp Berlin 2016

Meine Fotos vom TYPO3 Barcamp Berlin 2016:

Das Camp hatte Super Vorträge, nette und interessante Teilnehmer und war exzellent vorbereitet vom Orga-Team. Mehr Infos:

Spring Framework on OpenShift: persistence.xml and EntityManager Configuration on Wildfly 10 and MySQL

Running an Web Application with Spring Framework 4.2.x with Spring-Data-JPA and MySQL on OpenShift the RedHat Cloud is good with Wildfly10.

But how to configure the MySQL Database for Spring-Data-JPA?

First Step: edit persistence.xml. Here is an Example:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
xsi:schemaLocation=""> <persistence-unit name="mySimpleWorkListPU" transaction-type="JTA"><jta-data-source>java:jboss/datasources/MySQLDS</jta-data-source>

MySQL DataSource for Wildfly10 like Openshift

how to configure Wildfly10 to have a DataSource for MySQL like Openshift the RedHat Cloud.

I installed Wildfly10 on ~/srv/wildfly-10.0.0.Final

Step 1: Add MySQL Driver to modules:

Download the mysql-driver mysql-connector-java-5.1.38.jar from any Maven Repository e.g.:

go to WildFly modules Directory:
cd wildfly-10.0.0.Final/modules/system/layers/base
mkdir -p mysql/mysql-connector-java/main

copy  mysql-driver mysql-connector-java-5.1.38.jar here.

add a file module.xml with content:

<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.1" 
        <resource-root path="mysql-connector-java-5.1.38.jar"/>
        <!-- Insert resources here -->
        <module name="javax.api"/>
        <module name="…

Cyclic cellular automaton

The cyclic cellular automaton is a cellular automaton rule developed by David Griffeath and studied by several other cellular automaton researchers.

In this system, each cell remains unchanged until some neighboring cell has a modular value exactly one unit larger than that of the cell itself, at which point it copies its neighbor's value.

Run the Application
git clone
cd cyclic-cellular-automaton
mvn clean install exec:java

or Download the jar and double click on it to start the Application:



Diffusion-limited aggregation

Fractals and random walk due to Brownian motion cluster
Abstract Diffusion-limited aggregation (DLA) is the process whereby particles undergoing a random walk due to Brownian motion cluster together to form aggregates of such particles.

This theory, proposed by T.A. Witten Jr. (not to be confused with Edward Witten) and L.M. Sander in 1981,[1] is applicable to aggregation in any system where diffusion is the primary means of transport in the system. DLA can be observed in many systems such as electrodeposition, Hele-Shaw flow, mineral deposits, and dielectric breakdown.
Run the Application git clone
cd diffusion-limited-aggregation
mvn clean install exec:java

or Download the jar and double click on it to start the Application:



Simulated Evolution - Artificial Life and DNA

Green food appears in a world with red moving cells. These cells eat the food if it is on their position. Movement of the cells depends on random and their DNA. A fit cell moves around and eats enough to reproduce. Reproduction is done by splitting the cell and randomly changing the DNA of the two new Cells. If a cell doesn't eat enough, it will first stand still and after a while it dies.

Run the Application
git clone
cd simulated-evolution
mvn clean install exec:java

or Download the jar and double click on it to start the Application:

Explanationwaterfoodcell is young
cell is fat enough to reproduce
cell is old enough to reproduce
cell is hungry and waiting for food or death
cell is old and waiting for death*(if cell is fat and old enough for reproduction it splits and changes the childrens DNA) UML Class Modell

More h…

Mandelbrot Set drawn by a Turing Machine

Abstract the Mandelbrot set is the set of values of c in the complex plane for which the orbit of 0 under iteration of the complex quadratic polynomial z_(n+1)=z_n^2+c remains bounded.

That is, a complex number c is part of the Mandelbrot set if, when starting with z0 = 0 and applying the iteration repeatedly, the absolute value of zn remains bounded however large n gets. 

Running the Java Application git clone
cd mandelbrot
mvn clean install exec:java

or Download the jar and double click on it to start the Application:

Running the JavaScript Application goto:

The Turing Machine to Compute the Mandelbrot Set The Complex Number Plane is divided into Cells for the two dimensional Tape of the Turing-Machine.

Starting with Complex Number of Cell right from the Mandelbrot Set the Turing Machine goes one Step to t…