@SuppressWarnings("unchecked")
public void cleanup() {
long now = System.currentTimeMillis();
ArrayList<K> keysToDelete = null;
synchronized (cacheMap) {
MapIterator itr = cacheMap.mapIterator();
keysToDelete = new ArrayList<K>((cacheMap.size() / 2) + 1);
K key = null;
CachedObject c = null;
while (itr.hasNext()) {
key = (K) itr.next();
c = (CachedObject) itr.getValue();
if (c != null && (now > ((1000L * timeToLiveInSeconds) + c.lastAccessed))) {
keysToDelete.add(key);
}
}
}
for (K key : keysToDelete) {
synchronized (cacheMap) {
cacheMap.remove(key);
}
Thread.yield();
}
}
/** Write the map out using a custom routine. */
private void writeObject(ObjectOutputStream out) throws IOException {
out.defaultWriteObject();
out.writeInt(size());
for (MapIterator it = mapIterator(); it.hasNext(); ) {
out.writeObject(it.next()); // key
out.writeObject(it.getValue()); // value
}
}