Package com.apple.foundationdb.record.provider.foundationdb.storestate

Classes for caching RecordStoreState information. If not cached, every FDBRecordStore needs to retrieve this information with the database prior to performing any other operations with the record store. (In most cases, this should be done with the create() or open() methods.) This information is critical for maintaining an accurate view of the record store's meta-data version in the face of meta-data updates, but reading this information with every transaction can create hot spots in the underlying database that can degrade performance. To avoid that performance pathology, the classes in this package can be used to cache the store state information.

Interface Summary

Interface	Description
FDBRecordStoreStateCache	A cache for FDBRecordStoreStateCacheEntry objects.
FDBRecordStoreStateCacheFactory	A factory interface for FDBRecordStoreStateCaches.

Class Summary

Class	Description
FDBRecordStoreStateCacheEntry	Information needed to initialize an FDBRecordStore that is not stored within the record store's RecordMetaData.
MetaDataVersionStampStoreStateCache	An implementation of the FDBRecordStoreStateCache that uses the database's meta-data version-stamp key as the cache invalidation key.
MetaDataVersionStampStoreStateCacheFactory	A factory for creating MetaDataVersionStampStoreStateCaches.
PassThroughRecordStoreStateCache	An implementation of the FDBRecordStoreStateCache interface that does not actually cache anything.
PassThroughRecordStoreStateCacheFactory	A factory for creating PassThroughRecordStoreStateCaches.
ReadVersionRecordStoreStateCache	An implementation of the FDBRecordStoreStateCache that uses the read-version of the associated transaction as the cache invalidation key.
ReadVersionRecordStoreStateCacheFactory	A factory for creating ReadVersionRecordStoreStateCaches.