log.debug("ADD client to viewer Session "+message.getPublicSID());
if (viewerSessions.containsKey(message.getPublicSID())) {
viewerSessions.get(message.getPublicSID()).add(new ServerSharingViewerBean(sessionId, message.getPublicSID()));
} else {
List<ServerSharingViewerBean> viewerBeansList = new LinkedList<ServerSharingViewerBean>();
viewerBeansList.add(new ServerSharingViewerBean(sessionId, message.getPublicSID()));
viewerSessions.put(message.getPublicSID(), viewerBeansList);
}