The prerequisites to install YAWP are:
The easiest way to install it is by using its Maven archetype. You may change the values of the groupId, artifactId and version variables:
mvn archetype:generate \ -DarchetypeGroupId=io.yawp \ -DarchetypeArtifactId=yawp \ -DarchetypeVersion=LATEST \ -DgroupId=yawpapp \ -DartifactId=yawpapp \ -Dversion=1.0-SNAPSHOT
After that, you can cd into the yawpapp folder and start the development server:
cd yawpapp mvn yawp:devserver
Just point a web browser to http://localhost:8080/api to verify it.
Finally, if you want to deploy your API to Google App Engine, just follow this simple guide.