int frequency(Query query) {
assert query instanceof BoostQuery == false;
assert query instanceof ConstantScoreQuery == false;
// call hashCode outside of sync block
// in case it's somewhat expensive:
int hashCode = query.hashCode();
synchronized (this) {
return recentlyUsedFilters.frequency(hashCode);
}
}
@Override
public void onUse(Query query) {
assert query instanceof BoostQuery == false;
assert query instanceof ConstantScoreQuery == false;
// call hashCode outside of sync block
// in case it's somewhat expensive:
int hashCode = query.hashCode();
// we only track hash codes to avoid holding references to possible
// large queries; this may cause rare false positives, but at worse
// this just means we cache a query that was not in fact used enough:
synchronized (this) {
recentlyUsedFilters.add(hashCode);
}
}