private Server getHost(String machineIdentifier) {
if (clientCache == null
|| new Date().getTime() - lastClientCacheUpdate.getTime() > CACHE_VALID_TIME
|| clientCache.getServer(machineIdentifier) == null) {
lastClientCacheUpdate = new Date();
clientCache = getDocument(clientsUrl, MediaContainer.class);
}
Server server = clientCache.getServer(machineIdentifier);
if (server != null) {
return server;
}
return null;
}
