public void run() {
List<Integer> timedOutSockets = new ArrayList<Integer>();
while (true) {
timedOutSockets.clear();
try {
lock.readLock();
for (Integer id : socketMap.keySet()) {
if (socketMap.get(id).timedOut(timeoutInNs)) {
timedOutSockets.add(id);
}
}
lock.readUnlock();
lock.writeLock();
List<Socket> closingSockets = new ArrayList<Socket>();
for (Integer id : timedOutSockets) {
SocketWithTimeStamp s = socketMap.remove(id);
if (s != null) {
log.println(id + " closed because of time out.");
closingSockets.add(s.getConnection());
}
}
lock.writeUnlock();
for (Socket s : closingSockets) {
try {
s.close();
} catch (IOException e) {
// if already closed, just ignore it.
}
}
// some small sleep value so that the garbage collector isn't taking up all the cpu time
Thread.sleep(sleepTime);
} catch (InterruptedException e) {
assert false : "This thread should never be interrupted.";
}
}
}