GWT expenses demo in STS?

After hunting around a lot and trying different builds and versions of sts i still cannot get the expenses sample to run from within sts. I have managed to run it开发者_JS百科 using mvn ; but not using sts. the expenses demo uses gae < i am a newbie to gwt and gae> and i am trying to run the sample in demo mode. . sts fresh install . gwt 2.2 . gwt designer beta . google eclipse plugin . import samples/expenses from gwt2.2 as an existing mvn project . run as web application ( first /loadexpensdb.html )

i have run into quite a few different errors including file access permissions to the .txt files for loading data ( and then moving them to the top folder ; the same location as the pom.xml ) ; data-nucleus duplicate resource registration ; amongst others.

my question is this : is the expenses demo a roo (+data nucleus) only project ? can i not simply import it and run it in development mode in sts ? am i missing an understanding of how gae runs in dev or hosted mode ?

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Here's what I did, using STS 2.6SR1 and ROO 1.1.3

• start roo, execute command script expenses.roo
• exit roo
• mvn eclipse:clean eclipse:eclipse
• start STS, import the project
• in roo, issue this: dependency add --groupId com.google.appengine --artifactId appengine-api-1.0-sdk --version 1.4.3
• check if in project properties / google the app engine option is checked in. if you are using the maven version, be sure to follow instructions here:
  • http://juergen.kuster.cc/blog/2011/01/20/m2eclipse-gae-in-eclipse-3-5/
• run as web application

HTH