cannot make GOOGLE_APP_ENGINE work with gwt

[guillaumeB]

Hello

I use the last version of roo "spring-roo-1.2.2.RELEASE" througt eclipse 3.7 indigo

I take expense.roo sample
I just modify the jpa setup and
jpa setup --provider DATANUCLEUS --database GOOGLE_APP_ENGINE
and set web gwt
nota I also try with

web gwt gae update

before web gwt all

so here is my roo file not really extravagant

project --topLevelPackage org.springsource.roo.extrack

jpa setup --provider DATANUCLEUS --database GOOGLE_APP_ENGINE

enum type --class ~.shared.domain.Gender
enum constant --name MALE
enum constant --name FEMALE

entity jpa --class ~.server.domain.Employee --testAutomatically
field string --fieldName displayName --notNull
field string --fieldName userName --sizeMin 3 --sizeMax 30 --notNull
field string --fieldName department
field reference --type Employee supervisor
field enum --fieldName gender --type ~.shared.domain.Gender
field boolean --fieldName admin --notNull

entity jpa --class ~.server.domain.Report --testAutomatically
field string --fieldName purpose
field string --fieldName notes
field date --fieldName created --type java.util.Date
field string --fieldName department
field reference --type Employee reporter
field reference --type Employee approvedSupervisor

entity jpa --class ~.server.domain.Expense --testAutomatically
field number --type java.lang.Double amount
field string --fieldName description
field reference --type Report report
field string --fieldName approval
field string --fieldName category
field date --fieldName created --type java.util.Date
field string --fieldName reasonDenied

web gwt setup
web gwt all --proxyPackage ~.client.proxy --requestPackage ~.client.request

logging setup --level INFO

when I launch the project I have some Errors

these one not really important

[ERROR] 2012-06-07 15:18:54.093:INFO::Logging to STDERR via org.mortbay.log.StdErrLog
[ERROR] 7 juin 2012 15:18:54 com.google.appengine.tools.development.IsolatedAppClassLoader checkWorkingDirectory
[ERROR] ATTENTION: Your working directory, (C:\Work\workspace3.7\expenseGWT) is not equal to your 
[ERROR] web application root (C:\Work\workspace3.7\expenseGWT\target\expenseGWT-0.1.0.BUILD-SNAPSHOT)
[ERROR] You will not be able to access files from your working directory on the production server.
[ERROR] 
[ERROR] 7 juin 2012 15:18:54 com.google.apphosting.utils.config.AppEngineWebXmlReader readAppEngineWebXml
[ERROR] INFO: Successfully processed C:\Work\workspace3.7\expenseGWT\target\expenseGWT-0.1.0.BUILD-SNAPSHOT\WEB-INF/appengine-web.xml
[ERROR] 7 juin 2012 15:18:54 com.google.apphosting.utils.config.AbstractConfigXmlReader readConfigXml
[ERROR] INFO: Successfully processed C:\Work\workspace3.7\expenseGWT\target\expenseGWT-0.1.0.BUILD-SNAPSHOT\WEB-INF/web.xml
[ERROR] 2012-06-07 15:18:54.638:INFO::jetty-6.1.x

and after

[INFO] 2012-06-07 15:19:03,042 [main] INFO  org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 6763 ms
[ERROR] 2012-06-07 15:19:03.059:WARN::failed _ah_ServeBlobFilter: java.lang.ClassCastException: com.google.appengine.tools.development.ApiProxyLocalImpl cannot be cast to com.google.appengine.tools.development.ApiProxyLocal
[ERROR] 2012-06-07 15:19:03.059:WARN::Failed startup of context com.google.appengine.tools.development.DevAppEngineWebAppContext@1110fca{/,C:\Work\workspace3.7\expenseGWT\target\expenseGWT-0.1.0.BUILD-SNAPSHOT}
[ERROR] java.lang.ClassCastException: com.google.appengine.tools.development.ApiProxyLocalImpl cannot be cast to com.google.appengine.tools.development.ApiProxyLocal
[ERROR] 	at com.google.appengine.api.blobstore.dev.ServeBlobFilter.init(ServeBlobFilter.java:53)
[ERROR] 	at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
[ERROR] 	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[ERROR] 	at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:662)
[ERROR] 	at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
[ERROR] 	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
[ERROR] 	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
[ERROR] 	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
[ERROR] 	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[ERROR] 	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[ERROR] 	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[ERROR] 	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
[ERROR] 	at org.mortbay.jetty.Server.doStart(Server.java:224)
[ERROR] 	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
[ERROR] 	at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:196)
[ERROR] 	at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:239)
[ERROR] 	at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:146)
[ERROR] 	at com.google.appengine.tools.development.gwt.AppEngineLauncher.start(AppEngineLauncher.java:97)
[ERROR] 	at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
[ERROR] 	at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
[ERROR] 	at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
[ERROR] 	at com.google.gwt.dev.DevMode.main(DevMode.java:311)
[ERROR] 2012-06-07 15:19:03.175:INFO::Started SelectChannelConnector@0.0.0.0:8888
[ERROR] 7 juin 2012 17:19:03 com.google.appengine.tools.development.DevAppServerImpl start
[ERROR] INFO: The server is running at http://localhost:8888/
[ERROR] 7 juin 2012 17:19:03 com.google.appengine.tools.development.DevAppServerImpl start
[ERROR] INFO: The admin console is running at http://localhost:8888/_ah/admin

and server is not running well after http://localhost:8888/ is on http 503 error


Subsidiary question as last versions od appengine are JPA2 compliant do you think it would be possible to use
eclipselink and after to configure the appengine.xml and the eclipselink to work with appengine
because roo refuse the command

jpa setup --provider ECLIPSELINK --database GOOGLE_APP_ENGINE

thanks in advance for all your advices /answers

Regards

[andy]

For your subsidiary question ... EclipseLink does not support persistence to BigTable datastore. "GAE JPA" is a JPA implementation that provides persistence to BigTable. It is the only current JPA implementation providing persistence to BigTable. It is a plugin for DataNucleus, which also has plugins for RDBMS, NeoDatis, XML, ODF, Excel, HBase, MongoDB, Cassandra, LDAP and others.