Understanding AtmosphereResourceSession - Atmosphere/atmosphere Wiki

You can use an AtmosphereResourceSession to store serverside attributes against an AtmosphereResource. The AtmosphereResourceSession lives from the time it is created until the client disconnects. AtmosphereResourceSession instances are managed by the AtmosphereResourceSessionFactory.

eg:

public void setSessionValue(AtmosphereResource resource, String name, Object value) {
   AtmosphereResourceSessionFactory factory = AtmosphereResourceSessionFactory.getDefault();
   AtmosphereResourceSession session = factory.getSession(resource);
   session.setAttribute(name, value);
}

public <T> T getSessionValue(AtmosphereResource resource, String name, Class<T> type) {
   AtmosphereResourceSessionFactory factory = AtmosphereResourceSessionFactory.getDefault();
   AtmosphereResourceSession session = factory.getSession(resource, false);
   T value = null;
   if (session != null) {
      value = session.getAttribute(name, type);
   }
   return value;
}