Few months ago Dane from JArchitect team was kind enough to provide me with a license for JArchitect 3.1.0 Professional Edition, a multiplatform (GNU/Linux, Mac, Windows) software for static code analysis. While I was really swamped with my every-day work (and personal life) I didn’t have really much time to take a closer look at it that time. Few days ago I’ve said to myself ’that’s enough’ and X-rayed one of our company projects using JArchitect....
Despite the fact that EJB inheritance sometimes uses Java inheritance – they’re not always the same. Just as you could read in my previous post, EJB doesn’t have to implement any interface to expose a business interface. The other way around is also true – just because EJB is implementing some interface or extending other EJB doesn’t mean it exposes all or any of its views. Let’s say we want to have some basic EJB exposing remote business interface....
Being in EJB and JPA world using CMT (Container Managed Transactions) is very comfortable. Just define few annotations to demarcate transaction boundary (or use the defaults) and that’s it – no fiddling with manual begin, commit or rollback operations. One way to rollback your transaction is to throw non-application exception (or application exception with rollback = true) from your EJB’s business method. It seems simple: if during some operation there is a possibility that an exception will be thrown and you don’t want to rollback your tx than you should just catch this exception and you’re fine....
UPDATE (5.08.2013) – I’ve updated this post to support JBoss EAP 6.1 Final (JBoss AS 7.2). Enjoy UPDATE (2.09.2013) – Bela Ban pointed to his very interesting post about new ForkChannel feature and easy channel hijacking directly from JBoss AS / Infinispan. Read about it here JGroups is Bela Ban’s piece of software for reliable message exchange that is highly configurable and can use either TCP or UDP as a transport protocol....