About modify

forum_thread

Run out of memory

Hi, I've been looking into ObjectDB for our use, where everything has been great apart from I'm stuck on the following problem.   I am trying to load a large file (> 1GB), process certain information and store it back in the database to access / modify later. I require to be able to rollback changes as well, where there can be massive amount of changes.   ... information and store it back in the database to access / modify later. I require to be able to rollback changes as well, where there can ...

 
api-jdo

jdoPreDelete()

Called before the instance is deleted.(Method of javax.jdo.listener.DeleteCallback)

 
forum_thread

Delete object from collection versus delete from JPQL

I'm a newbie, so this is a pretty fundamental question. I'm not sure if there is a bi-directional relationship between the objects in memory and ObjectDB.  I know I can modify the objects and use persist() to write them to the database.  But does running a JPQL update or delete alter the in-memory objects? There are cases where the JPQL syntax is more expressive than operating on a collection, but I'm not sure if that will alter my program state.  Will it? Thanks, Lee  ... the objects in memory and ObjectDB.  I know I can modify the objects and use persist() to write them to the database.  But ...

 
api-jpa

multiselect(selectionList)

Specify the selection items that are to be returned in the query result.(Method of javax.persistence.criteria.CriteriaQuery<T>)

 
api-jdo

getFetchGroups()

Get a modifiable Set containing a mutable copy of all currently active (in scope) fetch groups.(Method of javax.jdo.PersistenceManagerFactory)

 
api-jdo

javax.jdo.listener.ClearLifecycleListener

This interface is implemented by listeners to be notified of clear events.(Interface of JDO)

 
api-jdo

retrieve(pc, useFetchPlan)

Retrieve field values of an instance from the store.(Method of javax.jdo.PersistenceManager)

 
api-jdo

setByteField(pc, field, currentValue, newValue)

Mark the field as modified by the user.(Method of javax.jdo.spi.StateManager)

 
api-jdo

setShortField(pc, field, currentValue, newValue)

Mark the field as modified by the user.(Method of javax.jdo.spi.StateManager)

 
api-jpa

transform(loader, className, classBeingRedefined, protectionDomain, classfileBuffer)

Invoked when a class is being loaded or redefined.(Method of javax.persistence.spi.ClassTransformer)