Live demo: https://gwt-oauth2.appspot.com/
First of all, under the root sample module, run:
mvn clean install -Denv=dev
Then open 2 terminals:
- In the first one, under the sample-server module, run:
mvn appengine:devserver -am -Denv=dev
- In the second one, under the root sample module, run:
mvn gwt:codeserver -pl sample-client -am -Denv=dev
Then access http://localhost:8080/ in your browser.