About Cache

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What is new in ObjectDB 2.0?

(PersistenceManagerFactory scope) object data cache. Query program cache for repeating queries with different arguments. Query result cache for repeating queries with identical arguments. Improved configurable database page cache. Designed to support very large database files (terabytes). Reducing round
JDO Doc
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javax.jdo.PersistenceManager

of interest to the listener Since: JDO 2.0 void checkConsistency() Validates the PersistenceManager cache with the datastore. Validates the PersistenceManager cache with the datastore. This method has no effect ... the consistency of instances in the cache against the datastore. An implementation might flush instances as
JDO Doc
18

javax.jdo.datastore.DataStoreCache

implementations allow instances to be cached in a second-level cache, and allow direct management of the cache by knowledgeable applications. This interface standardizes this behavior. Since: JDO 2.0 void evict(Object oid) Evict the parameter instance from the second-level cache. Evict the parameter
JDO Doc
17

javax.jdo.datastore.DataStoreCache.EmptyDataStoreCache

support a second-level cache. Since: JDO 2.0 DataStoreCache.EmptyDataStoreCache() Since: JDO 2. Since: JDO 2.0 void evict(Object oid) Evict the parameter instance from the second-level cache. Evict the parameter instance from the second-level cache. Parameters: oid - the object id of the instance
Manual
17

Working with JPA Entity Objects [2011-04-18]

at it is that the persistence context also functions as a local cache for a given EntityManager. ObjectDB also manages a level 2 shared cache for the EntityManagerFactory as well as other caches as explained in
Manual
17

Working with JPA Entity Objects

at it is that the persistence context also functions as a local cache for a given EntityManager. ObjectDB also manages a level 2 shared cache for the EntityManagerFactory as well as other caches as explained in
Manual
14

Setting and Tuning of JPA Queries

). This could be useful when the shared L2 cache is enabled and entity objects may already be available in the cache. Setting Query Hint (Scopes) Query hints can be set in the following scopes (from global
Manual
14

Retrieving JPA Entity Objects

of the database. The persistence context serves as a cache of retrieved entity objects. If a requested ... with data that is retrieved from the database (or from the L2 cache - if enabled). The new entity object
JPA Doc
14

JPA Miscellaneous

This section contains miscellaneous JPA types. The PersistenceUtil and PersistenceUnitUtil interfaces provide general utility methods: The Cache interface and the CacheRetrieveMode and CacheStoreMode enum types serve in managing the EntityManagerFactory's shared (level 2) cache: Other enum types are provided for setting of various JPA operations:
Manual
10

DELETE Queries in JPA/JPQL

. For example, the EntityManager may not be aware that a cached entity object in its persistence