# Package org.apache.storm.starter.tools

- Interface Summary
  Interface | Description
  --- | ---
  Rankable |

- Class Summary
  Class | Description
  --- | ---
  NthLastModifiedTimeTracker | This class tracks the time-since-last-modify of a "thing" in a rolling fashion.
  RankableObjectWithFields | This class wraps an objects and its associated count, including any additional data fields.
  Rankings |
  SlidingWindowCounter<T> | This class counts objects in a sliding window fashion.
  SlotBasedCounter<T> | This class provides per-slot counts of the occurrences of objects.