I study a WebSocket techology through this resource using Eclipse and GlassFish: enter link description here

It works fine without any errors but when I try to get a home page on localhost:8080/WebsocketHome (with beginnig http://) I get 404 Not Found. It might be the mapping problem but I actually don't know what I must change or do. Here are screen shot of a project build and error page. enter image description here