Running a BPEL process created with Netbeans in Apache ODE
A BPEL process without using vendor specific extensions should run everywhere without much hassle. But unfortunately it doesn’t. In this article I will show you how to create a …
Author: Jeroen van Wilgenburg
Mapping composite primary keys in JPA How to work around a bug in Hibernate Annotations
A table without single-column primary key, Java developers don’t like them because it’s more work than just putting @Id on a field. When you’re using Hibernate Annotations you might …
Wicket – It can do Ajax without writing any line of Javascript!
Wicket is around for a while, but lately it is getting more and more attention. A few years ago I attended a presentation about Wicket. It looked like a …
Using SoapUI on Apache ODE to test your BPEL processes more quickly
On the SOA-training I’m following we’re using the Oracle SOA Suite, a very nice product, but the time needed between saving changes and deploying the process takes way too …
Opening and extracting Zip files in java – It’s there for a while, but I just found out
A while ago I found out that it was possible to open Zip files with Java. Just open a regular java.io.File and pass it to the java.util.zip.ZipFile constructor. It …
Compile and invoke your webservice client (generated by XFire) in a running JVM
Generating XFire client files isn’t that special, but with Java 6 it is possible to compile those files immediately and invoke the webservice within one application. When I told …
Battle of the Geeks 2007 – An eyewitness report
Yesterday I attended the Battle of the Geeks. It was hosted by Finalist at the Netherlands Architecture Institute in Rotterdam. There were four presentations about different subjects. CMS Container, …
How to Unit-test private methods
I know it’s kind of wrong to test private methods and there are a lot of articles and books that will explain you why. But sometimes you have an …
Minify all your JavaScript and Stylsheets automatically with YUI Compressor and a Servlet Filter
In this article I will explain how to minify all your .js and .css files automatically with a servlet filter. This means you only have to define a servlet …
A quick introduction to the jQuery tablesorter plugin
A few days ago version 2.0 of the tablesorter plugin was released. Before 2.0 the tablesorter worked fine but I never did anything with it. Today I thought it …
How to fix your number-sorting problems in Javascript
Did you ever wanted to sort in Javascript and were the results unpredictable? It’s not a bug, but more something that’s not implemented. I came across this problem when …
Getting started with JPA mapping : How IntelliJ can map your data with a few clicks
With JPA, there finally is an ORM standard and every major IDE has support for it. Today I will show you how to map your data with IntelliJ IDEA. …
Do you really know how for-loops work? How to speed up your for loops
Did you know that the second parameter of a three parameter for loop gets executed on every loop? When this parameter is an expensive operation this could slow down …
Getting started with Eclipse 3.3 WTP 2.0 and JSF – will this JSF editor beat JDeveloper?
A few days ago a brand new Eclipse release popped up in my RSS reader. Eclipse 3.3 with WTP 2.0. After browsing through the new features I was very …
Using the javax.xml.bind annotations to convert Java objects to XML and XSD
May 30, 2007
Java, Software Development, Software Engineering, Tools, Web HTML5 CSS3, Web/Java, XML
4 Comments
Did you know that when you put the @XmlRootElement annotation on any class you can have an XML representation of that class? When I first saw Java 6 I …
Getting started with Derby – The java database bundled with Java 6
May 24, 2007
Databases, DBA Oracle, Java, Software Development, Tools, Web HTML5 CSS3, Web/Java
1 Comment
I often need a database to perform some quick tests. I usually start my Oracle instance. This takes some time and for most things it’s overkill. So a database …
A quick look at Guice A dependency injection framework by Google
May 20, 2007
Architecture, Java, Software Development, Software Engineering, Tools, Web HTML5 CSS3, Web/Java
5 Comments
About a month ago I read an entry on Dion Almaer’s blog about Google Guice. On the blog is a link to a video of a google tech talk …
Changing the colors of a bar chart in JFreeChart – Does it really have to be this much work?
The default colors of the first two bars in a bar chart are red and blue. We created a chart for a customer, but he wanted red and green …
Java Platform Debugger Architecture (JPDA) with Tomcat, OC4J, Eclipse, IntelliJ IDEA and JDeveloper
With JPDA it is possible to propagate changes to compiled classes to the server immediately. This is very handy when you’re debugging your class files. With some older applications …
Image Concatenation to limit http requests is it a solution?
After reading an article about image concatenation on Ajaxian I tried it myself, but soon I came across some obstacles. Of course one of these obstacles was the limp …
Unit testing Javascripts in Java 6 – Getting started with the javax.script api
April 19, 2007
IT, Java, Software Development, Software Engineering, Web HTML5 CSS3, Web/Java
5 Comments
I intended to reduce the things I do with Javascript. But maybe Javascript isn’t that bad when you can run it inside java. I’m still working on a very …
Why you should never ever copy code – An example of complete chaos
April 18, 2007
Architecture, DBA Oracle, Java, Oracle, PL/SQL, Software Development, Software Engineering
4 Comments
![Why you should never ever copy code – An example of complete chaos]({"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"http:\/\/seattletimes.nwsource.com\/ABPub\/2012\/08\/02\/2018836700.jpg","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"} "Why you should never ever copy code – An example of complete chaos")
It seems innocent, a few lines of code used twice in the same application. But before you know know it those lines appear 272 times in your application! You …
Using the Spring DataBinder to map Strings to objects
The Spring DataBinder is not only useful to bind request parameters, you can also use the DataBinder on other parameters, like command line arguments, JSON objects coming from an …
How to programmatically add a CDATA section to an XML document (with the internal Xerces)
This problem probably sounds very easy and it is actually very easy, but it took me so long to figure this out I think it’s worth a blog. I’ll …
Firebug 1.0 is final
January 27, 2007
Announce / Events, IT, Java, Software Development, Web HTML5 CSS3, Web/Java
No Comments
The best thing after sliced bread has reached a new milestone, version 1.0. Firebug is a great tool for HTML, DOM and especially Javascript. A lot of people from …
Using jQuery, the jQuery Form plugin and Stripes to create pretty Javascript and Java
I recently discovered jQuery, it a blazingly fast Javascript-framework and has a very compact notation. Now some guy made a plugin to submit plain html forms with Ajax and …
Unit testing with XFire – How to test your SOAP server with a WSDL file
XFire is a java SOAP framework. Of course there is Axis, but I think XFire can replace Axis. Axis is quite a good framework, but I think XFire is …
Getting started with Lucene 2.0 A powerful java search engine
July 23, 2006
Databases, Java, Software Development, Tools, Web HTML5 CSS3, Web/Java, XML
4 Comments
Lucene is a text search engine written in Java. It’s very easy to use (for both developers and users) and fast. The creator of Lucene (Doug Cutting) started with …
Mastering EJB3.0 – Free PDF Book Download
July 18, 2006
Databases, IT, Java, Oracle WebLogic Server, Software Development, Tools, Web/Java
59 Comments
Theserverside is offering a free copy of Mastering EJB3.0. Published in July 2006, the best selling book Mastering EJB is now in its fourth edition and has been updated …
Using Lucene with Spring Introduction to Spring Modules
June 26, 2006
Databases, Java, Oracle WebLogic Server, Software Development, Tools, Web HTML5 CSS3, Web/Java
7 Comments
While preparing a Lucene presentation and workshop I came across Spring Modules. It’s a small set of libraries that does things the Spring-way. It isn’t included in Spring because …
Modify Spring Beans and Log4j levels on a running server with JMX and JConsole
JMX (Java Management Extensions) is around for quite a while. But since Java 1.5 the JDK is bundled with JConsole, a JMX client, which will hopefully boost the popularity …
Verslag van JSpring 2006
June 16, 2006
AMIS, Databases, IT, Java, Software Development, Tools, Web HTML5 CSS3, XML
No Comments
JSpring vond net als JFall van afgelopen jaar weer plaats in de Reehorst in Ede, een mooie locatie en vooral goed bereikbaar met de auto. Er stonden weer diverse …
Printf and scanf in java new String formatting features in Java 1.5
printf is probably the best known function in C. I did some programming in C and I didn’t really like it (because I started with C after quite some …
ADF Faces for MyFaces is now called Trinidad
June 12, 2006
Development Tools, IT, Java, Oracle, Oracle WebLogic Server, Software Development, Software Engineering, Tools, Web HTML5 CSS3, Web/Java
1 Comment
Earlier this year Oracle donated their JSF UI components from ADF Faces to the Apache Software Foundation. Since ADF is more than a set of UI components it was …
Installing Oracle XE under Debian/(K)Ubuntu is easier than Windows
Yesterday I installed Oracle XE at my Ubuntu Linux server at home. I wanted to do this for a long time but was a bit scared because installing non …
Pitfalls in Internet Explorer “ How to cover them up or walk around them
I recently had to do a lot of Javascript and CSS scripting for a project. I have some experience with Javascript and CSS and know how to work around …
Advanced Javascript debugging with FireBug and analyzing your page with View Source Chart
FireBug is a debug tool that integrates with FireFox. You can change the DOM-tree, do logging, analyze AJAX-traffic, have advanced error reporting and probably some things I haven’t found …
AJAX validation with Spring without changing any java-code
Writing your own Eclipse plugin: How to show the blog headlines in Eclipse
Writing a plugin for Eclipse sounds scary and difficult. A few years ago I had to do a project with some other students for school. The project was writing …
Resizing images in Java using Java2D
Last friday a customer asked us if we knew how to resize images in java. Their clients are uploading images that need to be resized automatically. In the past …