Recommended samples for getting started are the chat, which demonstrate usage of all transports using an AtmosphereHandler, or the jquery-pubsub, which demonstrate how to switch from one transport to another using a Jersey Resources. If you are interested to write WebSocket only application, take a look at the atmosphere-websockethandler-pubsub sample. The pubsub sample contains a lot of small demonstration on how the Jersey extension can be used. If you are interested to write HTML5 Server Side Events application, take a look at the atmosphere-sse-xxx samples. If you plan to use Spring or GWT, take a look at their specific samples.