RemovalListener<Integer, AtomicInteger> removalListener =
        notification -> {
          if (notification.wasEvicted()) {
            evictionCount.incrementAndGet();
            totalSum.addAndGet(notification.getValue().get());
          }
        };

    CacheLoader<Integer, AtomicInteger> loader =
        new CacheLoader<Integer, AtomicInteger>() {
          @Override

            // Track time in open state
            if (oldState == State.OPEN && openStateStartTime.get() > 0) {
                totalTimeInOpen.addAndGet(System.currentTimeMillis() - openStateStartTime.get());
                openStateStartTime.set(0);
            }

            if (newState == State.OPEN) {

            // Track encrypted bytes for key rotation - lock-free atomic operation
            bytesEncrypted.addAndGet(message.length);

            return result;
        } catch (final Exception e) {
            // Clear sensitive data on error
            if (e instanceof CIFSException) {
                throw (CIFSException) e;