*   static final AtomicLong seq = new AtomicLong();
 *
 *   final long seqNum;
 *   final E entry;
 *
 *   public FIFOEntry(E entry) {
 *     seqNum = seq.getAndIncrement();
 *     this.entry = entry;
 *   }
 *
 *   public E getEntry() {
 *     return entry;
 *   }
 *
 *   public int compareTo(FIFOEntry<E> other) {
 *     int res = entry.compareTo(other.entry);

            @Override
            public QueryLog read() {
                if (count.get() >= queryLogs.length) {
                    return null;
                }
                return new QueryLog(queryLogs[count.getAndIncrement()], null);
            }

            @Override
            public void close() {
                // ignore
            }
        };

        // One or more integer values could be skipped in the event of a race
        // to generate a UID for the same object from multiple threads, but
        // that shouldn't be a problem.
        uid = counter.getAndIncrement();
        Integer alreadySet = uids.putIfAbsent(obj, uid);
        if (alreadySet != null) {
          uid = alreadySet;
        }
      }
      return uid;
    }

    @Override

    CacheLoader<Integer, String> failOnceFunction =
        new CacheLoader<Integer, String>() {

          @Override
          public String load(Integer key) throws Exception {
            if (count.getAndIncrement() == 0) {
              throw e;
            }
            return key.toString();
          }
        };
    CountingRemovalListener<Integer, String> removalListener = countingRemovalListener();

    CacheLoader<Integer, String> failOnceFunction =
        new CacheLoader<Integer, String>() {

          @Override
          public String load(Integer key) throws Exception {
            if (count.getAndIncrement() == 0) {
              throw e;
            }
            return key.toString();
          }
        };
    CountingRemovalListener<Integer, String> removalListener = countingRemovalListener();