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Tag Archives: grails

Workshops

25-Oct-07

Right now i’m in Frankfurt / Main, attending the iX Workshop Web Programming with Grails (Link in German).

The speaker, Dierk König, encouraged live blogging, so here we are:

Some ActiveRecord bashing and many, many windows machines around. People fiddling around with their Java Paths, IntelliJ IDEA, which should be way better and more impressive than Eclipse or my nifty little TextMate… In the meantime, everything works fine on a real OS (that is everything else than Windows, for that matter…)

I’m already bored and expecting something more to happen. Everything said in the last 3 hours or so has been written down somewhere on the Internet.

As i don’t want to bore anybody else, i’ll guess i have look at my feedreader.

Hey, the beat goes on, configuring some weird IDE has stopped…

Would anybody really read my live blogging? If a tree falls in a forest…

JEHOVA! He said G-String :)

So again, how are strings called in the Groovy JDK? G Strings?

Hm, breaks are wonderful… Too much to eat, too much coffee…

The guy next to me didn’t manage to get the command line version working neither any IDE… Help is not wished.

At least, there’s a recent issue of german magazin in the conference file… With the title story about Ruby on Rails, hrr, hrr ;) .
Sometimes i think the IT world needs more egomaniac, rockstar-like developers like Heinemeier Hansson

Why on earth does one guy write the code from the beamer down on a sheet of paper while he’s checking his emails at the same time?? Sometimes the outer world seems like a strange place to me. Strange and weird.

Funny thing: Received a 1&1 spam mail about some profiseller foobar this morning. There are two guys from 1&1 at the opposite desk… Well, i’m too good educated…

Is it a good idea to but lawyers and webprogrammers into the same hotel? ;)

“Divs are good for updating thingies on the page”

I guess its obvious that english isn’t my native language (can’t get the thought out of my head that tante is mocking me…), but language and spoken words always creates a frame for thoughts and far to often, a cage… And for that being said, one should pay more attention on how to paraphrase things.

I really hate it if the speakers machine is not prepared well. I really do enjoy giving little demonstrations but i’m fastidious to paranoid that everything is taken care of, tested and proved to be working… If their only 8 hours time, not working improvisation sucks.

I have to say, i really do like Groovy, it’s a chance to get some serious scripting into Java at home… err i wanted to say, at work. People tend to focus on just one language and limiting themselves, but with Groovy i can argue: It’s Java with some fancy things on top. And at least for me, it’s a good thing.

“Mit diesen Dingen kann man beliebig fancy werden” — Argh, my head schmerzts…

I should collect some pudding for the gay bar to see if this guy is really as witty as he writes. Would pudding suffer to pay you or do want some Hägen Dasz?

Party is over… Good night & good fight ;)

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Grails 0.6: Modifying JavaScript Libraries

19-Sep-07

Grails has a good mechanism for including JavaScript Libraries to do all that fance Ajax stuff. It all starts with:

<g:javascript library="scripaculous" />

Library can be one of yahoo, prototype, dojo, scriptaculous or rico. It’s a nice fact, that Grails doesn’t force you to use any special of these.

I wanted to change the included javascript source files (I use yahoo and wanted to get the latest release from their servers). In Grails 0.5.6 the core plugins were copied to $APP_HOME/plugins and i could modifiy them inplace. Grails 0.6 cleaned up some stuff so that the core plugins do not flood into the application tree.

I could hack the Grails source files or i can just modify the static member LIBRARY_MAPPINGS in JavascriptTagLib while starting up the application like so:

BootStrap.groovy in $APP_HOME/grails-app/conf

class BootStrap {
     def init = { servletContext ->        
          org.codehaus.groovy.grails.plugins.web.taglib.JavascriptTagLib.LIBRARY_MAPPINGS.yahoo.clear();
          org.codehaus.groovy.grails.plugins.web.taglib.JavascriptTagLib.LIBRARY_MAPPINGS.yahoo + ['anylibrary_file_you_want.js', 'anylibrary_file_you_want2.js', 'etc.js']
     }
     def destroy = {
     }
}

Furthermore, Grails 0.6 introduced the “base” attribute to g:javascript. Base denotes the full path that is prepend to the library file in question. So its possible to use any js file from wherever you want.

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Rails and Grails revisited

25-Jun-07

I’ve never thought that my little little post would made such an impact.

While writing that post i was frustrated explaining the Spring configuration to my colleaques again, i was frustrated over the url mappings and so the post was a little harsh.

I don’t think that Hibernate is inferior to Active Record, regarding Spring and ActionController, i cannot tell, i like ActionController just better.

Anyhow, bring all three parts, model, view and controller, together… And see where Rails shines: In ease of use and working right out of the box. No wonder they came up with this whole screencasting things (at least, i never saw this before), it’s just impressing.

Instead of pushing out framework after framework, view technology after view technology (Faces, ADF, etc.), they bundled working things together and i think that’s what people like about RoR.

And i guess there’s a need for such think on the Java side of life as well… If not, why is the Grailsteam working on Grails? To paraphrase my last post positive: They bring good things in a nice package together.

For getting me into groovy i must thank the people behind Grails, this stuff is really cool.

For further reading i recommend the following posts:

Apart from this, can please anyone assure me, that some of the questions on the SCJP exam are a little weird and not really from this world? ;)

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Ruby On Rails the Java Way: Grails

21-Jun-07

Why is it, that you have to take at least 2 heavy frameworks (Spring and Hibernate), a scripting addition to Java (Groovy) and build another layer on top of it to achieve a fraction of RoRs functionality? At least, i seems to look nice… a lot of xml configuration madness less, nice urls and so on. Although, i’m afraid of leaky abstraction. Anyway, here you go:

Grails
Groovy

I’ll give it a try, i’ll guess. At least, they have some good and well written tutorials on their sites.

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