Grails and Google App Engine - Should I use them together?

I wouldn't go for it. It needs more time to mature.

The website itself states that the plugin is bugged.

Bugs

It is true that there are some bugs with this plugin, but most have a solution at this time.

Example: The "DataNucleus Enhancer prevents application from building on Windows OS due to path length exceeding max path length on Windows."

However, there is a work-around for Windows and this wont stop use of the plugin.

Some annoying bugs have not been fixed:

on windows, killing the grails app-engine run process leaves an orphan java process, so every time, you have to manually end the java process,
flash.message is broken on GAE,
Cannot run integration tests with GAE/GORM-JPA.

If you feel like spending time debugging the plugin, writing and testing workarounds, go for it. Still, you wouldn't be safe from critical/blocker issues which will make you MAAAD!

If you really want to work on App-Engine, using Eclipse and the Google Plugin for Eclipse seems the easiest and most efficient method.

The Gaelyk site says, "At the time of the creation of the project, Grails was not yet ported to App Engine, and we felt a streamlined toolkit would be interesting. For bigger applications, you should be considering Grails though..." It sounds like they are suggesting Grails for a larger application.

Taylor Leese 2010-01-24 21:11:23

You can always use Amazon's EC2 to deploy your Grails apps.http://chris-richardson.blog-city.com/grails_plugin_for_deploying_to_amazon_ec2.htm

Boris Pavlović 2010-01-25 19:11:17

I don't want to pay for Amazon EC2 and I believe CloudFoundry is also going to require paying at some point in the future as well. That was my reason for wanting to use GAE.

Taylor Leese 2010-01-26 04:37:15

Posted a few of them:http://stackoverflow.com/questions/2128569/grails-class-org-grails-tomcat-tomcatloader-was-not-found-in-the-classpathhttp://stackoverflow.com/questions/2128544/grails-warnings-errors-during-run-app

Taylor Leese 2010-01-25 07:33:57

@leebutts Except grails nabble forum (http://old.nabble.com/grails---user-f11861.html), what are the other <quote>"Grails/GAE sites out there now"</quote> ?

fabien7474 2010-01-25 09:46:44

Found these via Google (a couple seem to down though!)http://groovytweets.appspot.comhttp://petclinic-grails.appspot.com (demo app from Graeme Rocher, Grails lead)http://mindhackme.appspot.com/http://maxieduncan.appspot.com/

leebutts 2010-01-25 11:28:10

I saw the comment, "However, there is a work-around for Windows and this wont stop use of the plugin." and was pretty frustrated that the solution appears to be known but isn't shared. I ended up building a POM to do Java+GAE using Google's maven plugin. It works quite well so I'm not actually using the Google Eclipse plugin at the moment. I also noticed the orphan java process happens when I do gae:run for debugging as well with Java/Maven so maybe that is not specific to Grails.

Taylor Leese 2010-01-25 16:32:53

Grails is "Rapid", "Dynamic" and "Robust" but everything just goes away with the GAE plugin.

rochb 2010-01-25 16:52:06

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Grails and Google App Engine - Should I use them together?

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