public int deleteOld(int minsize, long maxtime) throws IOException {
long timeout = System.currentTimeMillis() + maxtime;
Collection<byte[]> keys = keys4LargeReferences(minsize, maxtime / 3);
int c = 0;
int oldShrinkMaxsize = ReferenceContainer.maxReferences;
ReferenceContainer.maxReferences = minsize;
for (byte[] key : keys) {
ReferenceContainer<ReferenceType> container = this.get(key, null);
container.shrinkReferences();
try {
this.add(container);
c++;
} catch (SpaceExceededException e) {
}
if (System.currentTimeMillis() > timeout) break;
}
ReferenceContainer.maxReferences = oldShrinkMaxsize;
return c;
}
