gradle clean jettyRun
Then visit http://localhost:8080/rest/hello/aaa
java.ws.rs
https://docs.oracle.com/javaee/6/api/javax/ws/rs/package-summary.html
Jersey is an implementation of JSR-RS
The code is mostly from http://www.mkyong.com/webservices/jax-rs/jersey-hello-world-example/