jmonkey maven support next round
jmonkey have no maven support … here is my solution 
1. clone jme3-thirdparty from git, mvn install … done
2. clone jme3-buildhelper, copy pom.xml into jmonkey-engine … done
3. start hacking your jmonkey game with maven build support
https://github.com/ahoehma/jme3-maven-helper
Good to know this Hibernate Envers API changes
Today I tried to update the hibernate version for an internal customer project from 3.6.0.Final to 3.6.9.Final. In the project we are using Envers to track entity revisions. I already posted about that here.
I noticed that some tests broken with the new version. These tests doing something like this: “create a bean, do changes X times, check available revisions and changed properties from rev A to B”. In the new version I missed some changed properties. I’m so happy that we have some tests for that aspect because without them I guess I had found these effects.
I found this entries in the Envers user forum:
- Envers not auditing properties in super class
- Envers modification in Hibernate 3.6.8 is causing problems
Then I use the “try and fail” principle to find the latest working version: ONLY 3.6.0.Final works 
So there was an API change from 3.6.0.Final to 3.6.1.Final. Since 3.6.1.Final Envers doesn’t inspect parent class (es) per default to find out the audit able properties. But it’s easy to fix that:
- put a @Audited to all the base classes
- or use org.hibernate.envers.Audited.auditParents() (if you can’t change the base class)
Use maven profile to recompile vaadin widgetset
Today I will show you my maven profile to configure Vaadin widgetset recompilation.
The Vaadin wiki shows the basics … but I want widgetset update only if its necessary … so I moved the gwt/vaadin plugins in a profile and add a activation per file for this profile:
<profile>
<!--
Updates Vaadin widgetset definitions based on project dependencies
Remove widgetset directory to trigger recompile:
rm -Rf src/main/webapp/VAADIN/widgetsets/
-->
<id>update-widgetset</id>
<activation>
<file>
${basedir}/src/main/webapp/VAADIN/widgetsets/
</file>
</activation>
<build>
<plugins>
<plugin>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-maven-plugin</artifactId>
<version>1.0.2</version>
<configuration>
<!-- if you don't specify any modules, the plugin will find them -->
</configuration>
<executions>
<execution>
<phase>generate-resources</phase>
<goals>
<goal>update-widgetset</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>gwt-maven-plugin</artifactId>
<version>2.3.0-1</version>
<configuration>
<!-- if you don't specify any modules, the plugin will find them -->
${basedir}/src/main/webapp/VAADIN/widgetsets/
-Xmx512M -Xss1024k
${project.build.directory}/gwt-tmp/
<soyc>false</soyc>
<force>true</force>
</configuration>
<executions>
<execution>
<phase>generate-resources</phase>
<goals>
<goal>resources</goal>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
Hierarchical Iterator
import static com.google.common.collect.ImmutableList.of;
import java.util.Iterator;
import java.util.LinkedList;
import com.google.common.collect.AbstractIterator;
import com.google.common.collect.Lists;
/**
* This Iterator could be used for hierarchical data structure (e.g. Trees).
*
* @author Andreas Höhmann
* @param <T>
*/
public abstract class AbstractHierarchialIterator<T> extends AbstractIterator<T> {
private final LinkedList<Iterable<T>> stack = Lists.newLinkedList();
private Iterator<T> current;
public AbstractHierarchialIterator(final T start) {
this(of(start));
}
private AbstractHierarchialIterator(final Iterable<T> start) {
current = start.iterator();
}
/**
* An concrete hierarchical iterator has to implement a method to
* visit the children of an element.
*
* @param currentElement
* @return never <code>null</code>
*/
protected abstract Iterable<T> childrenOf(T currentElement);
@Override
protected T computeNext() {
while (true) {
if (current.hasNext()) {
final T next = current.next();
stack.add(childrenOf(next));
return next;
}
if (stack.isEmpty()) {
break;
}
current = stack.removeFirst().iterator();
}
return endOfData();
}
}
Examples
AbstractHierarchialIterator<Foobar> i =
new AbstractHierarchialIterator<Foobar>(foobarStart) {
@Override
protected Iterable<Foobar> childrenOf(final Foobar currentElement) {
// <--- here you have to implement something
return currentElement.getFoobarChildren();
}
};
// example 1 - show all foobars
while (i.hasNext()) {
System.out.println(i.next());
}
// example 2 - search the first "foo"
Foobar foo = com.google.common.collect.Iterators.find(i, new Predicate<Foobar>() {
@Override
public boolean apply(final Foobar input) {
return "foo".equals(input.getName());
}
}, null);
RIP Steve Jobs
Steve Jobs 1955 – 2011
Gregor Gysi macht die Merkel zur Schnecke
Yet another gource svn video example
# makesvnvideo.sh svn log $1 --xml --verbose --quiet > svn-log.xml && \ python $GOURCE_HOME/svn-gource.py --filter-dirs svn-log.xml > svn-gource-log.xml && \ $GOURCE_HOME/gource.exe --log-format custom svn-gource-log.xml -c 2 -s 0.1 --max-files 500 --hide dirnames,filenames,files,mouse,progress --stop-at-end -i 60 --multi-sampling --user-image-dir ~/.avatars --camera-mode overview --font-size 18 --font-colour FFFFFF --background 000000 --date-format "%d.%m.%Y" -r 25 -640x480 --highlight-users --user-friction .2 -o svn.ppm && \ $FFMPEG_HOME/bin/ffmpeg.exe -y -b 10000K -r 25 -f image2pipe -vcodec ppm -i svn.ppm -vcodec libx264 -threads 4 -bf 0 svn.x264.mp4
- download/install gource, put a $GOURCE_HOME in your .bashrc
- download/install svn-gource.py into $GOURCE_HOME
- download/install ffmepg, put a $FFMPEG in your .bashrc
- put avatar images in your ~/.avatar directory
- put makesvnvideo.sh in your PATH
makesvnvideo https://bloxel.googlecode.com/svn/trunk/
VAADIN Reverse Label with CSS
Here is a simple example how to use CSS to change the visual representation of Vaadin components.
The com.vaadin.ui.Label component have a caption and a icon, i.e. ”[I] Caption”.
But I need a label like this “Caption [I]“. This could be done with the following CSS:
.v-caption-reverseLabel {
float: left;
}
.v-caption-reverseLabel .v-icon {
float: right;
margin: 0px 2px 0px 2px;
}
.v-caption-reverseLabel .v-captiontext {
float: right;
}
final Label label = new Label();
label.setStyleName("reverseLabel");
label.setCaption("Foobar");
label.setIcon(new ThemeResource("img/info.gif"));
Bloxel Perlin Volume Renderer
We are making progress
I implemented a tessellation algorithm for volume -> mesh creation … here are some pictures from the bloxel labs …
Vaadin my first steps
A new customer project started this month. My team and I are creating a new web application. I’m the lead designer of the project and I think about new technologies for that application.
After many projects with JSF and Richfaces I want to go new ways. First of all Richfaces is a great framework and you can do (almost) everything you want. But some requirements are very tricky to implement, i.e. confirmation dialog with user input, multiple windows …
Currently I’m evaluating Vaadin and I love it. It is so easy to use (at first sight). The java geek blog inspired me to try Vaadin.
In the near future I will post more about my experiences. Stay tuned
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