In my last blog, I outlined how I found the Scala XML library a pleasant solution for unpleasant XML format conversion jobs. In those jobs, I had to completely transform the document from one grammar to another.
A few months ago, I had one of those unpleasant format conversion jobs. I had about 1,000 multiple choice questions in RTF format and needed to import them into Moodle.
I am working on rewriting a set of labs for our intermediate students at SJSU. Version control is something that everyone with a CS degree is pretty much expected to know these days, so I thought of digging up an old Subversion lab from my open source programming class.
Composite components are a great feature of JSF 2.0. The canonical example is a login component with fields for the username and password:
One nice thing about JSF 2.0 is that they have taken good ideas from elsewhere, such as the “project stage” concept from Rails. If you set the project stage to ”development”, you get detailed error and warning messages. If you set it to “production”, you get more aggressive caching. Better diagnostics or better performance?
JSF 2 introduces an EL variable
flash. Anything you set persists for one post-redirect-get cycle. (In contrast, anything in the request scope is gone after a redirect.) A typical use of the flash is for messages. A managed bean method might put a message in the flash,
A few weeks ago, Ed Burns posted a link to a blog on the JSF expert group mailing list, commenting “A nice one, but it doesn't mention JSF 2”.
As I happily wrote about new features of JSF 2.0, my coauthor David Geary kept asking me how to run the examples in Tomcat 6. I kept putting it off—hunting down all those JAR files and
web.xml fragments is just too much like eating soup with a fork.
Java EE 6 has three different ways of defining “beans” that are “managed” in one way or another. Here is a quick recap.
JSF 2.0 introduced annotations to avoid the tedium of declaring managed beans in faces-config.xml:
For the upcoming semester, I want to run a learning management system into which I can integrate an experimental feature for evaluating student programs. It needs to be open source so that I can modify it.