Scripting RAD tools such as Ruby on Rails and Grails can be really slow?

Tiago Fernandez in his blog reported some results about benchmarks using Java, JRuby, Groovy and Scala. I know: we can talk about benchmarks for days but in the Internet there are a lot of them and the performance problems of the scripting language is not a news.

Results show that Groovy is very slow in comparison to the pure Java and the Scala scripting language. This could be a serious reason to be worried when your application created with Grails or RoR goes in production...

So, why don't you use a real Java RAD tool like Roma Meta Framework? :-)

You can develop shortly without using a scripting language with the benefits of great refactoring support (Eclipse, Netbeans and IntelliJ are master on it) and performance and scalability!

The source: http://tiagofernandez.blogspot.com/2009/05/java-integration-with-groovy-jruby-and.html

Romulus at the Internet of Services 2009 conference

On June, 10th 2009 I will be in Brussels to present the Romulus demo at the "Internet of Services 2009" conference. Romulus project is scheduled in the afternoon. Below the agenda.

Group 2: June 10, 13:30 - 17:30

• Semantically enhanced SLA Negotiation (BREIN)
• Automated Service Level Agreement Management Framework - Adhoc Demonstrator (SLA@SOI)
• TEAM: Knowledge management in distributed software communities by applying semantic technologies (TEAM)
• Decentralized transactional collaborative drawing (SELFMAN)
• Romulus: your answer to improving productivity in Java Web Applications (ROMULUS)
• Edutain@Grid: A Service-Oriented Infrastructure for Future Real-Time Interactive Internet Applications (edutain@grid)

Luca in the first page of Google searching for "Java JSR"

Today Mara told me that searching "Java JSR" in Google (at least in the Italian version), in the first page compares my face and this blog... I've tried and is real! What nice thing :-)

Transparent DataNucleus enhancement at run-time

Today it has worked! In the last days I was working to avoid the enhancement phase in the building of Roma Framework projects. Yes. Until yesterday you needed to invoke the "persistence-compile" task in your Roma project and all the projects that contained persistent classes.

Furthermore pre-packaged modules such as ADMIN, USERS, MESSAGING and SCHEDULER-QUARTZ needed to self-execute the enhancement in order to put persistence capable classes inside the JAR. This was a mess if you needed to change the ORM binding since anything resided inside the JAR.

I have to check yet if run-time changes to the entity POJOs are auto-enhanced at the fly... If works the productivity would be speedup over and over again.

Thanks to Andy Jefferson of DataNucleus team in supporting my crazy requestes :-) The work tomorrow will be in changing all the wizards to support the new configuration. In few words the change consist in:

1. Let to the PersistenceAspect to invoke the Enhancer at startup
2. Create the file persistence.xml inside the src/META-INF folder.
   

Once everything works I'll commit in to the SVN trunk for the upcoming release 2.0.

Romulus technical meeting in Madrid

Today has finished the 3-days technical meeting of Romulus. In the first day we've worked in the UPM (Universitad Politecnica de Madrid) class room.

For the second day Carlos Iglesias has organized the entire working day in Segovia, a beautiful city at about one hour from Madrid. We've worked inside a agritourism and eaten a lot of home made food. In the afternoon we have had the social roundtrip in the Segovia city. If you're in Madrid you can't not to visit Segovia! There are a lot of monuments in a so small city. The catedral, the Fortress and the Roman waterworks, all in perfect state. It seems they was built in the past year.

This morning we went back to the UPM class room in order to finish the last pending works and give the new action points. Asset Data is envolved in almost all the activities and I know that when I'm back to Italy a huge work expects me and my company for the next months.

Am I Tired? Not at all. Instead, I'm very excited to go back to work to the new Roma Meta Framework version 2.0 and contributing to the growth of Romulus consortium & technology.

Tomorrow is the last day. Luigi will take the flight in the early morning. Giordano and me, instead, will go to the Toledo city for a fast trip. Just the time to see the centre of the city, buy a tipical medieval sword for my house, having lunch with "Pulpo a la Gallega" and go back to Madrid for the our flight.

Bye bye Spain!

Released Roma Meta Framework 1.2.0: the latest 1.x version!

Today I've released the version 1.2.0 of Roma Meta Framework. This is the last 1.x version since starting by tomorrow I'll work to the next 2.0 implementing a lot of new ideas born in the last year.

Roma 2.0 will be not more compatible with 1.x but someone will provide a migration tool that will help to port current/old applications to the new one. Soon a presentation of the main new ideas.

A huge work is waiting for me. For this reason let me enjoy the 1.2.0, just for today!

Below the main addictions and improvements of the 1.2.0:

CORE module:
- Created CollectionWrapper domain classes to display collections in better way. Now there are two implementations: TableWrapper<> and MasterDetailWrapper<>. See the Handbook.pdf to know more
- Disable the class checking for hot-updates. Useful in production
- New refresh of multiple fields in one shot or the entire object
- Resolved bug on the session management under WebLogic AppServer

VIEW module:
- New "URL" rendering mode to embed static and dynamic content in forms. Now you can embed HTML files, JSP files and Web sites at all
- Managed render of collections and arrays using the "OBJECTEMBEDDED" mode
- Resolved a bug on table ordering
- Improved Echo2 Table component in order to support the change of the color of the column headers
- Updated to the stable version 2.1.0 of Echo2

DATANUCLEUS module:
- Updated to the stable version 1.1.0 of DataNucleus

ADMIN module:
- Fixed management of Info and InfoCategory instances
- Created CRUD of GenericValue

JETTY module:
- Integrated new release of Jetty 6.1.5
- The script under the user project script/start-jetty.sh (and .bat) now works

CRUD wizard module:
- CRUD now generate also: factory class (DDD), repository class (DDD) and an entry in the package.jdo file if any

Luca, Roma e Romulus: tre amici su Mokabyte

Se non hai proprio nulla da fare, magari perchè stai usando Roma e quindi hai finito prima il tuo lavoro :-), leggiti questa intervista fatta dalla rivista Java più letta in italia: Mokabyte

JavaDay III edition

The 3rd edition of the JavaDay is gone. 1.400 visitors: 1225 workers, 363 student, 74 unemployeed.

The AssetData's stand has received more than 300 curricula. For this reason I've take the decision to build from stratch an application to collect all them using Roma Meta Framework. After 1 hour it worked, but the GUI is not yet very intuitive...

During the event I encounter Paolo, a very old collegue of about 12 years ago in my second project for the IRI group. I have seen again a lot of other past collegues and friends...

I love the JavaDay also for this reason :-)

(photo by Valerio Casale)

Recupero crediti? Non ho il fisico

Da quando sono diventato uno pseudo-commerciale e seguo i clienti direttamente mi capita, ahimè, di occuparmi anche di RECUPERO CREDITI. Eggià. Clienti che chiedono servizi, consulenze, prodotti e poi dopo mesi arrancano sempre le solite scuse. Le 5 migliori del 2008 sono state:

1. La nostra banca si è fusa in un gruppo più grande e non riusciamo a fare i bonifici!
2. La società è in ottima salute...Ma abbiamo problemi di cassa
3. I nostri clienti non ci hanno pagato...
4. La fattura è stata smarrita (fu consegnata a mano!)
5. Abbiamo deciso che vi pagheremo solo se riusciamo a rivenderlo al cliente finale (dopo 3 mesi dalla consegna)
   

Diciamo che non ho propriamente il fisico per fare "recupero crediti". E quindi ecco il motivetto che mi accompagnerà nel 2009:

"Soffro lo strees
io soffro lo stress
sono stanco e fuori forma
vado in giro per clienti
a recuperare i pagamenti
ci deve essere un errore!!!"

Roma JavaDay III edition in Rome

Today, 3 years after its inception, the JavaDay in Rome is the technical reference event for Java technology in Italy. It boasts a terrific turnout and the participation of the most eminent speakers of the community.

The Rome JavaDay takes place at Università Roma TRE with the purpose of establishing a privileged channel with university students. It has a highly technical connotation and is a joint-effort of three Italian Java communities, namely Java User Group Roma, Java Italian Portal e Java Italian Association.

Attendance is free of charge.

IMHO the most interesting talk is: ROMULUS. Java Web Development made productive