Abstracting the DAO Layer with Hibernate/JPA
A well-abstracted DAO layer means that the service layer doesn’t know anything of the persistence mechanism. This is generally desirable – you can later switch to a different storage –Continue reading
Is JaveEE Really Portable? And Is It Really Useful?
In the past hours I’ve been implementing a sample JMS+MDB+JPA application. I had to read quite a lot of tutorials, documentations and other samples, because I had no prior experienceContinue reading
JMS, MessageDriven EJB (MDB), Timers, Maven, JPA (Hibernate) JBoss Example
On an interview I was given a task to implement a simple messaging system, using timers, message-driven beans and a build tool of my choice. This, of course, had toContinue reading
Time Zones and Java Web Applications
The TimeZone (as well as the locale and encoding) are retrieved by the JVM from the operating system. This in my opinion is not a good decision, but that’s notContinue reading
On Domain-Driven Design, Anemic Domain Model, Code Generation, Dependency Injection and More…
Eric Evans has formulated what domain-driven design (DDD) is. Martin Fowler is a great supporter and advocate of DDD. These are remarkable names and it is almost certain they areContinue reading
UI for Managing PKI, Instead of keytool or openssl
This blogpost shares a wonderful utility – portecle – GUI for managing PKI Update: KeyStore explorer seems good as well
Appeal to API Designers
If a developer has used the Java security APIs he already knows what’s ahead. That’s not the only example, alas, but I’ll be using it to illustrate my point. TheseContinue reading
Using Multiple ELResolvers with CompositeELResolver in JSF
Imagine the case where you have a JSF application that’s already using some custom ELResolver, but you want to get all the benefits of spring and want to have theContinue reading
Tips for Identifying and Debugging Problems
It seems that some/many developers haven’t developed (pun intended) a good set of techniques to identify and resolve problems. And problems always occur, even in simple programs. Recently I’ve beenContinue reading
Spring Annotation-Based vs XML-Based Transaction Definition Precedence
I couldn’t find a definitive answer to this in the docs, and although there seems to be a logical answer, one can’t be sure. The scenario is this – youContinue reading