Sample Hello World App configured to deploy in Google App Engine:

Run the Application Locally:
$ SRCDIR=src/cmpe-281-lab2/estore-gcloud-app-engine
$ git clone https://github.com/srinivasap/estore-gcloud-app-engine.git $SRCDIR
$cd $SRCDIR
$ ./mvnw -DskipTests appengine:devserver

Deploying the Application into App Engine:
$ gcloud app create --region us-central
$ ./mvnw -DskipTests appengine:update