Spring Framework on Google App Engine

http://www.mkyong.com/google-app-engine/google-app-engine-spring-3-mvc-rest-example/
https://developers.google.com/appengine/articles/spring_optimization
http://en.wikipedia.org/wiki/Google_App_Engine
http://www.mkyong.com/google-app-engine/google-app-engine-spring-3-mvc-rest-example/
http://spring.io/blog/2009/04/08/write-your-google-app-engine-applications-in-groovy
http://java.dzone.com/articles/creating-application-using
http://java.dzone.com/articles/rapid-cloud-development-spring
https://developers.google.com/appengine/docs/java/tools/maven
https://developers.google.com/appengine/docs/java/tools/maven#configuring_pomxml_settings_for_google_app_engine
http://www.infoq.com/news/2009/08/google-chose-jetty/


$ roo.sh
roo> script --file gae-expenses.roo
roo> quit
$ mvn appengine:devserver

Google App Engine supports many Java standards and frameworks. Core to this is the servlet 2.5 technology using the open-source Jetty Web Server,[10] along with accompanying technologies such as JSP. JavaServer Faces operates with some workarounds. Though the datastore used may be unfamiliar to programmers, it is easily accessed and supported with JPA. JDO and other methods of reading and writing data are also provided. The Spring Framework works with GAE, however the Spring Security module (if used) requires workarounds. Apache Struts 1 is supported, and Struts 2 runs with workarounds.[11]

[Note] change gae.version to 1.9.3(or whatever in google's document) in pom.xml