private void readLock(String keyName) { getLock(keyName).readLock().lock(); }
private void readUnlock(String keyName) { getLock(keyName).readLock().unlock(); }
private void writeUnlock(String keyName) { getLock(keyName).writeLock().unlock(); }
private void writeLock(String keyName) { getLock(keyName).writeLock().lock(); }