public IVideo retrieve(String siteId) {
VideoTimeStampPair pair = null;
synchronized (waitingList) {
pair = waitingList.remove(siteId);
}
if (pair == null) return null;
else return pair.getVideo();
}
private void checkTimeout() {
long curTime = System.currentTimeMillis();
synchronized (waitingList) {
Iterator it = waitingList.keySet().iterator();
while (it.hasNext()) {
String siteId = (String) it.next();
VideoTimeStampPair pair = waitingList.get(siteId);
if (curTime - pair.getTimestamp() > timeout) it.remove();
}
}
}