@Private @Evolving

Package org.apache.hadoop.hdfs.server.federation.store.driver

The state store uses modular data storage classes derived from StateStoreDriver to handle querying, updating and deleting data records. The data storage driver is initialized and maintained by the StateStoreService. The state store supports fetching all records of a type, filtering by column values or fetching a single record by its primary key.

Each data storage backend is required to implement the methods contained in the StateStoreDriver interface. These methods allow the querying, updating, inserting and deleting of data records into the state store.

Interface Summary

Interface	Description
StateStoreRecordOperations	Operations for a driver to manage records in the State Store.

Class Summary

Class	Description
StateStoreDriver	Driver class for an implementation of a StateStoreService provider.
StateStoreOperationResult	State store operation result with list of failed records.
StateStoreSerializer	Serializer to store and retrieve data in the State Store.