# Package org.apache.storm.metricstore.rocksdb

- Interface Summary
  Interface | Description
  --- | ---
  ReadOnlyStringMetadataCache | The read-only interface to a StringMetadataCache allowed to be used by any thread.
  WritableStringMetadataCache | The writable interface to a StringMetadataCache intended to be used by a single RocksDBMetricwWriter instance.

- Class Summary
  Class | Description
  --- | ---
  MetricsCleaner | Class for removing expired metrics and unused metadata from the RocksDB store.
  RocksDbKey | Class representing the data used as a Key in RocksDB.
  RocksDbMetricsWriter | Class designed to perform all metrics inserts into RocksDB.
  RocksDbStore |
  StringMetadataCache | Class to create a use a cache that stores Metadata string information in memory.

- Enum Summary
  Enum | Description
  --- | ---
  KeyType | Specifies all the valid types of keys and their values.