CodingClues

Recently I stumbled across a problem with the rich:modalPanel component of the JBoss RichFaces component library, which didn’t want to show the data of a backing been.

Let’s assume the following scenario:
You have a DataTable with several rows. Each row contains a “See details…” button. This button will popup a modal panel using rich:componentControl and the panel is populated with data of a backing bean. This backing bean is filled with actual data by clicking our “See details…” button using a4j:actionparam

Read more…

There are a lot of tips and hints out there on the internet, which describe how you could add support for Java Server Faces and Facelets to the Eclipse environment.
Mostly, they deal with adding code completion for JSF/Facelets tags and so on. There are some possibilities to achieve this, ranging from creating TLD files to using the JSP editor in Eclipse for the XHTML code of the Facelets pages.

But the “trick” I prefer is much more simple

You want to see it? Well, just download and install the JBoss Tools and you have it all!

Usually, when you enter standard <!-- ... --> html comments in your XHTML definition for a Facelets view, these comments are rendered by Facelets, so they are included in the resulting HTML. Even EL contained in these comments is executed!

In most cases, this is not what you hope to see, because if you want to make real comments, you have to use the <ui:remove> tag, which is not really comfortable.

Read more…

You are wondering why your JUnit tests run very fine when you launch them using Eclipse, whereas they all break down when building your project with a build system like Ant or Maven?

Well, thats probably because you are using assert statements and Eclipse per default is not configured to evaluate them.

To solve this problem, simpy go to Run -> Run… -> Arguments, and in the box labeled VM arguments:, enter either -enableassertions or just -ea.

That’s it!

Recently I visited Jazoon, an international conference for Java developers at Zurich, Switzerland.

Having heard a lot of interesting talks, I want to sum up my impressions and try to figure out some of the latest trends in the world of Java as well as interesting facts for software architects.

This is part 4 of my series of blog posts and deals with

Google Android

In his talk about the Google Android platform, Peter Wlodarczak described the experiences he made when developing a mobile application for the new Smartphone OS from Google.

His application is a mobile translator, which is even able to do some OCR in order to translate e.g. Chinese signs.

Developing applications for Windows CE based Smartphones for years, I want to compare the impressions I got from Android to the experiences I made with Windows CE.

Read more…

Recently I visited Jazoon, an international conference for Java developers at Zurich, Switzerland.

Having heard a lot of interesting talks, I want to sum up my impressions and try to figure out some of the latest trends in the world of Java as well as interesting facts for software architects.

This is part 3 of my series of blog posts and deals with

Ajax Push

Having worked with ICEfaces (but suspended work for now due to a lot of bugs), I was curious to hear a talk of one of the guys of ICEfaces, Ted Goddard.

The topic was Ajax Push. Surely, Ajax is a buzzword of today and everybody wants to have some Ajax functionality in his application, maybe just to be cool.

Read more…

Recently I visited Jazoon, an international conference for Java developers at Zurich, Switzerland.

Having heard a lot of interesting talks, I want to sum up my impressions and try to figure out some of the latest trends in the world of Java as well as interesting facts for software architects.

This is part 2 of my series of blog posts and deals with

Google Web Toolkit

I visited two talks about the GWT.

As you probably know, Google Web Toolkit follows the idea that the presentation layer of a web application can be entirely written in plain Java.
Mainly, the GWT is a compiler that compiles your Java code into highly optimized JavaScript, that is executed on the client side.

Read more…

Recently I visited Jazoon, an international conference for Java developers at Zurich, Switzerland.

Having heard a lot of interesting talks, I want to sum up my impressions and try to figure out some of the latest trends in the world of Java as well as interesting facts for software architects.

This is part 1 of my series of blog posts and deals with

Scala

This keynote was presented by Martin Odersky, a professor at EPFL in Lausanne, Switzerland. Maybe you have already heard of him. He is about to develop a programming language that could be the successor of Java: Scala.

Read more…

Recently I inserted about 200 rows into a MySQL table using Hibernate.

However, my application had an error because of missing data and I explored the database in order to find the problem.

In general, SQuirreL is a good tool to do this and I like using it, but this time it made me crazy.

Read more…

This HowTo describes a way to integrate Seam, Spring and jBPM in order to use the same Hibernate SessionFactory in both Spring and jBPM (and of course, Seam).

At first, make sure you use the latest version 2.1.0 of Seam since you could get trouble with 2.0.1 and SpringTransactions.

The relevant parts of the configuration are:

Read more…