Package org.apache.openjpa.datacache

OpenJPA Data Cache

OpenJPA's data and query caching frameworks.

Interface Summary

Interface	Description
CacheDistributionPolicy	A policy determines whether a given entity should be cached and if true, in which named partition of the cache.
CacheStatistics	Counts number of read/write requests and hit ratio for a cache in total and per-class basis.
CacheStatisticsSPI	The provider extensions to the CacheStatistics interface.
DataCache	Interface that must be implemented by any level 2 cache used by OpenJPA.
DataCacheManager	Manages the system's data and query caches.
DataCachePCData	Specialized PCData implementation for data caching.
DataCachePCDataGenerator.Timed	Simple interface to give access to expiration time.
ExpirationListener	An entity that wishes to be notified when cache keys expire.
QueryCache	Interface that must be implemented by any level 2 query cache used by OpenJPA.
TypesChangedListener	An entity that wishes to be notified when types change.

Class Summary

Class	Description
AbstractDataCache	Abstract DataCache implementation that provides various statistics, logging, and timeout functionality common across cache implementations.
AbstractQueryCache	Abstract QueryCache implementation that provides various statistics, logging, and timeout functionality common across cache implementations.
AbstractQueryCache.Default<T>	A default implementation of query statistics for the Query result cache.
CacheStatisticsImpl	The default CacheStatistics(SPI) implementation.
ClearableScheduler	Cron-style clearable eviction.
ConcurrentDataCache	A DataCache implementation that is optimized for concurrent access.
ConcurrentQueryCache	A QueryCache implementation that is optimized for concurrent access.
DataCacheManagerImpl	Default data cache manager provides handle to utilities PCDataGenerator, ClearableScheduler and CacheDistributionPolicy for the cache operation.
DataCachePCDataGenerator	A PCDataGenerator instance which generates properly synchronized instances suitable for use in the cache.
DataCachePCDataImpl	Specialized PCData implementation for data caching.
DataCacheStoreManager	StoreManager proxy that delegates to a data cache when possible.
DefaultCacheDistributionPolicy	A default implementation that selects the cache by the type of the given managed instance.
DelegatingDataCache	Delegating data cache that can also perform exception translation for use in facades.
DelegatingQueryCache	Delegating query cache that can also perform exception translation for use in facades.
ExpirationEvent	An event indicating the expiration of an object from the data cache, or an expiration of a result list from the query cache.
PartitionedDataCache	A partitioned data cache maintains a set of partitions that are DataCache themselves.
QueryCacheStoreQuery	A StoreQuery implementation that caches the OIDs involved in the query, and can determine whether or not the query has been dirtied.
QueryCacheStoreQuery.CachedList	Result list implementation for a cached query result.
QueryKey	This class stores information about a particular invocation of a query.
QueryResult	A query result.
TypeBasedCacheDistributionPolicy	A cache distribution policy based on the type of the managed objects.
TypesChangedEvent	An event indicating that instances of given persistent types have been modified.

Enum Summary

Enum	Description
AbstractQueryCache.EvictPolicy
DataCacheMode