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From Joe Bohn <>
Subject Re: Grails, JRuby on Rails, etc... scripting languages/environments and Geronimo integration
Date Fri, 10 Oct 2008 18:22:00 GMT
Kevan Miller wrote:
> On Oct 10, 2008, at 10:52 AM, Jason Dillon wrote:
>> On Oct 10, 2008, at 4:27 AM, Joe Bohn wrote:
>>> Grails framework - This is a self contained framework that leverages 
>>> groovy for scripting.  It uses a rails like code by convention 
>>> approach to generate and host web applications.   It is licensed 
>>> under Apache. It embeds Jetty for hosting the generated web 
>>> applications but can also export WAR files which can be then deployed 
>>> application servers like Geronimo.  There is an article that gives a 
>>> nice description on how to utilize Grails to generate a web app and 
>>> deploy it into Geronimo 
>>> (
>>> As far as integration with Geronimo goes, I'm not sure that there is 
>>> much to we can do.  I guess we could document this in our wiki or 
>>> perhaps generate a plugin (or whatever the Grails term is) so that 
>>> the geronimo deployment plan can be generated rather than created 
>>> manually, but I'm not sure that is worth the effort.  There doesn't 
>>> seem to be a good place for programmatic integration with regard to 
>>> the framework itself.
>> Um, there isn't a good place, because there isn't really any need for 
>> anything.  From the containers perspective its just another WAR 
>> deployment.
> One thing I was thinking about was to create a Grails plugin (which 
> contains the jars required to run a Grails web app). Thus avoiding 
> having to package all of the Grails dependencies in the WAR, itself. 
> Instead, they'd be declared as a dependency. Pushing wars with a bunch 
> of redundant jars, didn't strike me as very desirable. Grails might need 
> a bit of customization to build suitable WARS. 

Interesting idea.  I hadn't really thought of that ... I just was 
planning to work with the war generated by Grails.  I'll think about 
constructing the war differently (or perhaps doing some inplace 
deployment) and moving the grails jars to a plugin.

>> I would still be interested to see something, a sample even, running 
>> under Grails inside of Geronimo.  AFAICT Grails is a very powerful 
>> framework for whipping up apps, so we could potentially use it... say 
>> for the console :-P
> A sample would certainly be helpful... Agreed about Grails, in general. 
> I was thinking it would be interesting to see if we could make it 
> simpler/more efficient to bridge between the two environments.

There is a sample of sorts in the article referenced earlier.  But, this 
doesn't really do anything for Geronimo/Grails integration and is a 
little hard to find.  We could certainly do something to provide a 
sample/tutorial in our wiki ... but perhaps it would be much more 
interesting if we did something with the grails gbean you proposed and 
then some type of in-place deployment to make creating and running in 
Geronimo quick and easy.  Something more to think about.  Thanks!

>>> JRuby on Rails - My understanding is that this is basically a Ruby 
>>> implementation that runs on the Java VM (the JRuby portion) and 
>>> leverages the Rails framework.  It is licensed under CPL/GPL/LGPL. 
>>>  In many ways it is similar to Grails using an embedded web server to 
>>> facilitate a rapid application development environment ... this time 
>>> built upon the JRuby language interpreter.  Here again, I suspect we 
>>> can provide some directions so that an exported war could be deployed 
>>> in Geronimo (or perhaps a plugin to generate geronimo deployment 
>>> plans) but there doesn't seem to be much in the way of direct 
>>> integration that we can provide.
>>> There are other frameworks as well.  Trails is one that I stumbled on 
>>> which is also in the same vein as Grails with a focus on definition 
>>> of the domain model and generating the rest of the app dynamically.
>> From what I have seen, most dynamic languages which run in Java also 
>> support some-sort of web/WAR integration.  But don't really require 
>> much else to work.  So I think that simply providing samples is 
>> sufficient.
>> I guess supporting the javax.script/JSR-223 stuff via Apache BSF 3.x 
>> is a good idea, though really I've no idea how/if/why someone would 
>> want to use it.  Maybe someone wants to generate a web-page, or maybe 
>> someone wants to get the return value of a script injected into their 
>> GBean, or wants the script to be their GBean, or wants to have a chunk 
>> of script executed when the server loads... who knows.
> Personally, I thought Grails was the best fit, but that may be because 
> I've used Groovy more (which isn't saying a whole lot) and new a bit 
> more about it...
> --kevan

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