Taking it for a test drive now.
thanks a lot!

You could do this before, Grails is afterall just Spring so you can configure whatever you want. All you have to do first is uninstall the Hibernate plugin

grails uninstall-plugin hibernate

And then you can configure JDO inside your application. The AppEngine plugin configures JDO for you, we could write a more general purpose plugin for configuring JDO too.

I've tried to follow along with the screen case but have a number of issues.

First after I create the domain class and perform generate-all I get:

groovy.lang.GroovyRuntimeException: Failed to parse template script (your template may contain an error or be trying to use expressions not currently supported): startup failed, Si
mpleTemplateScript1.groovy: 2: unable to resolve class org.codehaus.groovy.grails.orm.hibernate.support.ClosureEventTriggeringInterceptor
@ line 2, column 16.
1 error

at _GrailsGenerate_groovy.generateForDomainClass(_GrailsGenerate_groovy:85)
at _GrailsGenerate_groovy$_run_closure1.doCall(_GrailsGenerate_groovy:50)
at GenerateAll$_run_closure1.doCall(GenerateAll.groovy:42)
at gant.Gant$_dispatch_closure4.doCall(Gant.groovy:324)
at gant.Gant$_dispatch_closure6.doCall(Gant.groovy:334)
at gant.Gant$_dispatch_closure6.doCall(Gant.groovy)
at gant.Gant.withBuildListeners(Gant.groovy:344)
at gant.Gant.this$2$withBuildListeners(Gant.groovy)
at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
at gant.Gant.dispatch(Gant.groovy:334)
at gant.Gant.this$2$dispatch(Gant.groovy)
at gant.Gant.invokeMethod(Gant.groovy)
at gant.Gant.processTargets(Gant.groovy:495)
at gant.Gant.processTargets(Gant.groovy:480)
Error running generate-all: Failed to parse template script (your template may contain an error or be trying to use expressions not currently supported): startup failed, SimpleTemplateScript1.groovy: 2: unable to resolve class org.codehaus.groovy.grails.orm.hibernate.support.ClosureEventTriggeringInterceptor
@ line 2, column 16.
1 error

Trying to deploy an empty skeleton app to app engine (with GAE SDK 1.2.1) – so no domain classes et cetera gives me:

C:\dev\grails\grails-1.1.1\projects\jan-vissers>%APPENGINE_HOME%\bin\appcfg update .\target\war
Email: **********
Reading application configuration data…
Bad configuration: XML error validating .\target\war\WEB-INF\datastore-indexes.xml against C:\dev\gae\appengine-java-sdk-1.2.1\docs\datastore-indexes.xsd
Caused by: cvc-elt.1: Cannot find the declaration of element 'datastore-indexes'.

I must be doing something. But what?

Mindboggling cool! Should definitely put Grails on everyone's radar screen.

Thanks guys (Thomas/Arulazi) – got it working now.

Thomas – heh.. thanks for the instructions for the workaround.
Now, to the real issue..
Could we somehow, slowdown releases? I mean, it seems that right now there is a mad rush to be able to twitter "we did it!" when in fact.. as Thomas's post indicates.. that actual solution is very very far from done.

Grails, to me, is this massive performance enhancing tool.. and right now, it seems like it is 20 hours a week, late at night, moving sideways and not forward at all

Hi,

I read all the posts here and try to solve problem occurred when running the default application created by the following sequence.

grails create-app test
cd test
grails uninstall-plugin hibernate
grails install-plugin app-engine
grails create-domain-class com.test.User
grails install-plugin hibernate
grails generate-all com.test.User
grails uninstall-plugin hibernate
grails app-engine run

Question 1: I selected JPA when installing app-engine, but this line
"Configuring JDO for AppEngine"
appeared in the output after I ran "grails app-engine run".
Is this a bug?

Question 2: Now the last line of the output says open the browser and goto
"http://localhost:8080/"

When I do that, the browser page shows "Grails Runtime Exception"

and the windows console shows a bunch of exceptions, here is some of it.
WARNING: EXCEPTION
org.springframework.web.util.NestedServletException: Request process
ing failed; nested exception is org.codehaus.groovy.grails.web.mapping.exception
s.UrlMappingException: Error mapping onto view [/error]: Error evaluating expres
sion [request.'javax.servlet.error.message'.encodeAsHTML()] on line [31]: java.l
ang.NoClassDefFoundError: Could not initialize class org.springframework.web.uti
l.HtmlUtils
at org.springframework.web.servlet.FrameworkServlet.processReque
st(FrameworkServlet.java:583)
at org.springframework.web.servlet.FrameworkServlet.doGet(Framew
orkServlet.java:501)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.
java:487)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandle
r.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHan
dler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandle
r.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandle
r.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.j
ava:405)
at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.h
andle(DevAppEngineWebAppContext.java:54)

I am using Grails 1.1.1 and app-engine-0.8.3.
I just want to make the default application with views running on my local windows. I had a success without view created.

Can someone show a simple tutorial to do that?

Thanks,
gapes