Please let there be an easy way to create a cluster-wide singleton with an annotation! In fact, I’d love to see the cluster mindset change a little bit. Let’s face it, few people are using EJB to create simple throwaway apps that will never run clustered. Many of them may not grow to that point, but anyone intentionally writing a low-use app is unlikely to use an environment such as EJB in which to do it.

Having an easy way to create a cluster-wide singleton without having to worry about cache access issues, the risk of creating two objects and destroying one if there’s a cache race (generally not a big deal, but something you have to deal with anyway), etc, would be wonderful. Sure, it can be done without it, but one of the massive wins in EJB3 has been taking concepts that were difficult and handling them with a single annotation so the developer doesn’t have to risk the “enter everything correctly and get your desired behavior; miss one thing and encounter weirdness” behavior we all grew to hate with EJB2…

Any pointers? Or is there a better place to ask this question?

Thanks

Special purpose clients are not likely to send more than one.

“Why would a client or server ever produce or consume wildcard content types? i.e. “text/*” or even “*/*”?”

IMO, wild card types apply to general purpose clients like browsers.

very good job… if I were able to let it work.

I have to scan the “deploy” directory of JBoss for finding annotated classes at JBoss startup, but the following code doesn’t work:
String homeDir = System.getProperty(”jboss.server.home.dir” + “\\deploy\\”;
File file = new File(homeDir);
URL url = file.toURI().toURL();
AnnotationDB db = new AnnotationDB();
db.scanArchives(url);
Set annotatedClasses =
db.getAnnotationIndex().get(MyAnnotation.class.getName());
“annotatedClasses” is null, even if there are annotated classes in existing “.ear” files.
Same result if url points to a specific ear file. “MyAnnotation”, of course, is placeholder.

Is your code able to scan inside jars but not ears/sars/wars…? Or, did I wrote something wrong?

Thanks in advance for your help.

It’s a little late to commiserate on the Pat’s loss, but thought I would find out if you are the same Bill Burke I used to work with at CapitalOne.

I recently bought a copy of your EJB 3 book, and found my way to your blog.

-Abhijeet Deshpande

By the way, one of the most interesting and intriguing readings about REST vs WS-* can be found here: http://duncan-cragg.org/blog/post/getting-data-rest-dialogues/

These articles brought me a lot of questions that i hadn’t thought about before. When I first read about RESTFul web services some years ago, the subject was still quite crude. Nowadays there are much better articles about it. I really like RESTFul web services and they are my main focus of study and work right now. Fascinating power.

Another great reading on this subject is the book RESTFul Web Services. This is the best thing you can read on the subject

Regards,

Bruno Pereira