About clear
Working with JPA Entity Objects
Explains the entity object lifecycle and the persistence context.... The persistence context can be cleared by using the clear clear() EntityManager's method Clear the persistence context, ...
clear()
Clear the persistence context, causing all managed entities to become detached.(Method of javax.persistence.EntityManager)
Working with a cleared cache
I'm working on trying to improve the performance of our database processing class and I'm attempting to keep the L1 cache within the PersistenceManager cleared in an effort to reduce its memory footprint. The code snippet below is part of a Callable task that is run repeatedly with a given list of commands. When I run the code as written I start getting the stack traces that are listed. However, if I comment out the calls to makeTransactionalAll() and evictAll() everything works. #1 2011-08-18 15:42 I'm working on trying to improve the performance of our database processing class and I'm attempting to k ...
Storing JPA Entity Objects
Explains how to use JPA to store (persist) entity objects in the database.... requires special consideration. The combination of the clear and flush methods can be used to save memory in large ... Page... ( ) ; em. clear clear() EntityManager's method Clear the persistence context, ...
javax.jdo.listener.ClearLifecycleListener
This interface is implemented by listeners to be notified of clear events.(Interface of JDO)
Detached Entity Objects
Explains detached entity objects and how to work with detached objects in JPA, including merging them into an EntityManager.... Bulk Detach The following operations clear the entire EntityManager javax.persistence.EntityManager ... EntityManager . Invocation of the clear clear() EntityManager's method Clear the persistence ...
What algorithm in find()
I test the time cost for find(), obtain a linear complexity with the following codes: ... the result of not using enhancement and not calling clear . Please check this forum thread that might be relevant. ... that become larger and larger because of not using clear and classes that are not enhanced. ObjectDB ...
javax.jdo.InstanceCallbacks
A PersistenceCapable class that provides callback methods for life cycle events implements this interface.(Interface of JDO)
