Sure... Last I checked the JUG seemed pretty booked up. Rick Hightower Chief Technology Officer Trivera Technologies, LLC. Phone:520-290-6855 Fax:520-290-4179
----- Original Message ----- From: "Warner Onstine" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, June 20, 2002 7:41 PM Subject: Re: [jug-discussion] EJB QL + XDoclets = more EJB on more projects > Do I hear someone volunteering for an XDoclet presentation =). > > -warner > > ----- Original Message ----- > From: Rick Hightower > To: [EMAIL PROTECTED] > Sent: Thursday, June 20, 2002 12:01 PM > Subject: [jug-discussion] EJB QL + XDoclets = more EJB on more projects > > > EJB QL + XDoclets = more EJB on more projects > > > I have recently read a lot of articles about whether or not developer should > use EJB. > > > > The argument against EJB tends to be that they are too complex. This is > ironic since EJB's purpose was to simplify server-side development. Don't > get me wrong... I agree EJB is too complex with for a lot of projects. Too > many developer's were using EJB to add an extra bullet on their resume. > While I agree that EJB is not for every project, I think recent advances in > tools and techniques equate to EJB being more applicable to more projects. > > > > Of particular interest in developer productivity with EJB is CMR, EJB QL and > Xdoclet (EJBDoclet). Basically, the productivity and utility of these tools > have to exceed the inherent difficulties in using EJB in order for EJB to be > considered on a project. These tools lower the bar while increasing the > utility and make more projects candidates for EJB. > > > > Xdoclet, and open source project, simplifies EJB development by using > JavaDoc API and some additional APIs as a code generator so that a developer > only has to maintain one file instead of 5 or more files (,i.e., deployment > descriptor, local interface and/or remote interface class files, local home > and/or remote home class files, vendor deployment descriptors and/or conf > files, bean implementation, primary key class files, value class files and > more.) > > > > There is a significant increase in productivity by using select methods and > EJB QL. Code that use to take 10, 20, 30 lines of code can be written in > just a few lines of code by mastering EJB QL. > > > > When you combine Xdoclet simplification with EJB-QL and CMR, you can use EJB > on a lot more projects. > > > > With CMR it is really easy to work with the standard collections API (which > we all know and love) when dealing with one-to-many and many-to-many > relationships between entities. > > > > EJB 2.0 specification has been out for a while. Have you tried the new > features like CMR and EJB QL? If so, what do you think? > > > > My personal experience is that finder and select methods (written in EJB QL) > are really productive and can save a lot time. Is EJB QL the killer tool? > > > > If you have not tried CMR or EJB QL, I wrote a tutorial on CMP/CMR and EJB > QL that I think you should check out. The tutorial is on IBM developerWorks. > Please go to this link to find out more information on this tutorial series > and related articles. > > > Go to developerWorks and download the first two tutorials. > > The free tutorial is broken up into four parts. > > > > The first part describes basic EJB 2.x CMP with a simple finder method > defined in EJB QL. > > > The second part describes defining EJB CMR relationships. Three types of > relationships are covered: > > > > Many to Many > > One to Many > > One to One > > > > > Both unidirectional and bidirectional relationships are covered. > > > > The third part describes basic EJB QL. It mostly deals with joining cmr > fields and working with IN and MEMBER OF. > > > > The fourth and final part describes advanced EJB QL, and how to create > select methods. The tutorial refactors code using the select methods and > show a 10x reduction in code. (And gives directions how to rewrite a method > from the earlier examples with a 20x reduction in code.) > Master select methods and you will love EJB QL!! > > > > You can download the PDF files for the tutorial from developerWorks and view > the tutorial offline. Or you can view it online. (see the links above to > developerWorks) > > > > Parts 3 and 4 are done. They should be out really soon. They have been > bounced back and forth a few times between me and the editor. There is also > an article in the works on XDoclet and EJBDoclet (more on this later). > > > > The code in the first two parts works with Sun's RI for J2EE (RI is the > reference implementation). Peter Luellen from West Side Widgets created the > deployment descriptors to get final code from part 1 and 2 working for > JBoss. (JBoss is an open source EJB application server.) > > > > The code in the last two parts of the tutorial were done in WebLogic. The > code will run on JBoss, Resin and more shortly. Check back at my site to see > code updates to other app servers, and to see if the XDoclet article has > been published. (Also if you would like to run the examples on your favorite > app server, and send the configuration and/or code updates, I will glady > accept them. Send them to [EMAIL PROTECTED]) > > > > The code in the last two parts uses XDoclets, and makes a good example of > how to use XDoclets to setup CMR relationships and write finder and select > methods in EJB QL. > > > > Rick Hightower > Chief Technology Officer > Trivera Technologies, LLC. > Phone:520-290-6855 > Fax:520-290-4179 > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
