Very often you can read ” xml descriptors are dead with EJB 3 “. Well, it’s not exactly true. XML descriptors are not dead, they are optional (thank god). But there is still a very good and legitimate use for them when you want to configure an EJB. When you have an attribute in an EJB which value can change at deployment, you don’t want … Continue reading Configure your EJB 3 with envirnoment entries using ENC
More and more customers are using wikis for collaborative work… and universities too. At the Cnam, where I teach, we felt the need of using a wiki. Our department installed MediaWiki last year but the administrator didn‘t set up the rights properly so it was a real nightmare for teachers to have access to the right resources. A couple of month later, nobody was using … Continue reading XWiki tutorial
Let‘s face it. Exceptions in Java have always been a nightmare because we‘ve never known how to handle them properly. Hundreads of articles and thousands of blogs have tried to help us on “how to use exceptions in Java“. We went from “all exception should be checked“ to “all shoud be unchecked“ and then to “business exception should be checked and technical exceptions unchecked“, “each … Continue reading Container Managed Transaction, EJB 3 and Exceptions
We‘ve been using EJBs for a long time now and, thanks to Java EE 5, it‘s today even easier to do so. What happens when you are comfortable with something ? You forget the basics. And the basics are, J2EE 1.4 or Java EE 5, an EJB runs inside a container. This container can do a lot for you, transactions for example, but you have … Continue reading Container Managed Transaction – Mind the interface
I‘ve been an Intellij Idea follower for more than 5 years now. I’ve never really made the move to Eclipse, unless I really have to on rare occasions. Here is another example of how good Idea is. I’ve been developing a little bit with Groovy and recently with Grails. I was sad not to see any Groovy features in the IDE, but things have changed. … Continue reading Intellij Idea is really Groovy
Saturday the 30th of June I‘ll be at the Parisian library Le Monde en Tique signing copies of my book from 3:30pm to 6pm. Thanks to Jean Demetreau for organizing this event. So, if you want to have a drink, talk about Java EE 5 and even buy a book and get it signed, it‘s the right moment, at the right place (the library is … Continue reading Signing copies of my book
Next Tuesday from 5pm to 6pm French time, the Journal Du Net is organizing a chat (in French) about the Java EE 5 book I wrote. I’ll be on the other side of the computer answering questions about the content of the book but also Java EE 5 in general. You just have to enroll and be ready on Tuesday afternoon. See you there. Continue reading Java EE 5 Book Chat
Just to let you know that the book I wrote about Java EE 5 is out. I‘ve blogged before about its content and I’ve also written a presentaion on my web site. The book helps expert Java developers to write an e-commerce website with the lastest Java EE 5 specifications (EJB 3, JPA, JSF, JSP, JMS, JavaMail) running on GlassFish and Derby. The book is … Continue reading Java EE 5 Book is out
I was trying to do a study about the evolution of Java in terms of the langage (how many versions, how many APIs in each version, main features…), its popularity (how many book written in the last 10 years, evolution of the market, job offers in the last 10 years…), its enterprise version (versions of J2EE, how many specifications in each version…)… but I‘m giving … Continue reading Java EE version history: Help Needed !!!
I‘ve just published an article about JAXB 2 on DevX web site. JAXB (Java Architecture for XML Binding) allows you to perform XML-to-Java data binding and generate Java classes from XML schemas and vice-versa. But in this article I mainly focus on marshalling (generate XML from Java objects). You will see how easy it is to generate XML without doing much (thanks to coding by … Continue reading Article: Generate an XML Document from an Object Model with JAXB 2
Just to let you know that I will be presenting my book at the GlassFish Community User Group during the Sun Tech Day in Paris. It will be a quick 15 minutes talk called Learn Java EE 5 on Wednesday the 21th of March around 11 am. I know, 15 minutes is a bit quick to learn Java EE 5, that‘s why you will have … Continue reading Learn Java EE 5 at Sun Tech Day (Paris)
Few weeks ago I blogged about JPA and how I believe it will be the future of ORM. After a first article introducing basic concepts, I wrote a second one for DevX showing how to use JPA to map inheritance, one-to-many, and many-to-many relationships. And also a little bit more of query language (JPQL) to query concrete and abstract classes. Continue reading Article: Persistence Pays Offs: Advanced Mapping with JPA
Few weeks ago I‘ve posted about trying Java Black Belt at the University to test the level of our students. We made 40 students take 3 exams (JSP, Servlet and EJB) and got their feedback. Being French students we had some “I didn‘t understand every questions”. We decided not to take that into account because engineering students should have a good technical English understanding. Some … Continue reading Java Black Belt will be at university
I‘ve been playing a bit with Groovy and I‘ve attended a Grails presentation done by Guillaume Laforge back in January. I thought it was really good and when he mentioned the Grails conference in London I thought “Let’s go! The conference is in May, just during my birthday, I love London, I have plenty of friends there, it would be a good oportunity to know … Continue reading Why is JavaPolis so cheap (or why are IT conferences so expensive)
In the Java EE 5 book, you will have to develop a web and a swing application that talk to an EJB 3 back end. In this Flash animation, you’ll see how to use the Petstore web application. First It browses the catalog of pets, then logs a user on, who buys a few animals, adds them to my shopping cart, changes some quantities of … Continue reading Demo of the Petstore application
I was clearing my old bookmarks and adding them to magnolia when I realized that Java Technology was pointing to http://www.javasoft.com. A long time ago (1998/1999) that was the link to java.sun.com. So now, if you type http://www.javasoft.com you’ll be automatically redirected to java.sun.com. Even on Wikipedia, if you type JavaSoft you’ll be forwarded to Sun Microsystem. There is just Webopedia that tells you that … Continue reading www.javasoft.com
I have to say, I believe in JPA. Being a former BEA consultant, I used entity beans at a very early stage of the spec and was one of the first to do a prototype of entity beans 2.0 for a customer with a beta version of weblogic (6.0 if I still remember back in 2001). I thought that wasn‘t very good (to be polite). … Continue reading Article: Master the New Persistence Paradigm with JPA
I‘m quite excited. At the CNAM University we’ve decided to try Java Black Belt with our students. The idea is to use JBB to ensure a minimum level of Java within our students. Thanks to John Rizzo (who I met at JavaPolis) and Gonzague Lefere who‘ve setup a temporary server just for our IT department. Our students will have the week of the 5th of … Continue reading Java Black Belt at University
As I‘ve posted back in september, the book I’ve written uses Java EE 5 to develop a good old PetStore-like application. It’s written in French and will be published by Eyrolles at the end of March or begining of April. It is part of the Les cahiers du programmeur collection (programmer‘s book). This collection is quite pragmatic and focuses on a hands-on approach. The books … Continue reading Java EE 5 Book – What, When, Who
Yes, I‘ve been tagged by Matthieu… a long time ago. I should have blogged back a month ago but because of finishing my book I haven‘t had time to do it. I deserve a penalty for beeing so late. So, here are six things (instead of five) about me that (nearly) nobody knows : Tell me a word and I‘ll sing you a song. I‘m … Continue reading I’ve been tagged – Six things you don’t know about me
Today I‘ve uploaded all my Open Office files to Eyrolles FTP server. That’s it, I’ve finished writing my book about Java EE 5. I will blog later about its content. I just want to thank my team of readers : Matthieu Riou, Alexis Midon, Zouheir Cadi and David Dewalle. Thanks guys, you‘ve been a great help. The book will benefit from your comments and expertise. … Continue reading Java EE 5 Book – The End
Well, how to say that in a simple way: JavaPolis 2006 was great. Here are more details. Organisation First of all, the organisation was amazing. JavaPolis is not organised by Sun, BEA, IBM, Oracle… but by the BeJUG (Belgium Java User Group). Guys like you and me who decided 5 years ago to create such an event that became international and very professional. I‘ve been … Continue reading JavaPolis 2006 – Back Home
God, I‘m so involved in finishing writing my book that I’ve completly forgotten talking about JavaPolis. I’m leaving tomorow from Paris in an early train (6:55am) and will present a Quicky about JUnit 4 on Thursday. I‘ve already picked up the sessions I want to attend, mainly JEE, Scripting languages and a bit of JSE. A couple of former BEA colleagues should be there and … Continue reading JavaPolis 2006 – Leaving tomorow morning
A couple of days ago a friend sent me an email saying that I haven‘t blogged for few weeks now. The reason is that I‘m writing a book about Java EE 5 and it‘s taking me a lot of time (after work and in the week-ends). The chapters will roughtly be : * Presentation of Java EE 5 * Presentation of the Architecture of the … Continue reading Writing a book about Java EE 5
I like to unit test CRUD (Create, Read, Update, Delete) operations for my domain objects as well as find all. I use the same template again and again, it’s quick to do and makes sure that the basic operations work. Here is what I do : * A first find all to get all the objects from the database * Create an object with random … Continue reading How to unit test CRUD operations
