About managed

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Forum
15

Cascading merge() leading to "Attempt to persist a reference to a non managed instance" error

.UserException: Attempt to persist a reference to a non managed ObjectDbCascadingMergeTest$Parent
Forum
15

Internal objectdb error when open a database or open an entity manager

we get following exception when we open a database or open an entity manager   Exception in thread "ODB IndexActivation" [ObjectDB 2.6.6_06] Unexpected exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_51 (on Windows 7 6.1). Please report this error on http://www
Forum
15

Is ObjectDB suitable for DMS (Document Management System)?

Is ObjectDB suitable for DMS (Document Management System) like application that requires to store attachments in database? I specificaly mean the ability to store and handle file attachments(MS Office, OpenOffice files, PDF files etc.) properly. Are there any limits on database size or attachment
Forum
15

Managing software release cycles.

How do you manage software release cycles with objectDB? For example we might have different installation of a given web application, and we might need to introduce new fields with default values or to change something in the database "structure".  How can we apply the update script
Issue
15

OutOfMemoryError, if close the entity manager

Hello, why this error occurs during close the entity manager?   Caused by: java.lang.OutOfMemoryError: Java heap space at com.objectdb.o.PageCacheFile.m(PageCacheFile.java:173) ~[na:na] at com.objectdb.o.PAG.N(PAG.java:498) ~[na:na] at com.objectdb.o.PAG.y(PAG.java:282) ~[na:na] at com
Forum
15

Server connection management

with the transaction commited and manager closed at the end of each action
JPA Doc
15

javax.persistence.EntityManager

. Within the persistence context, the entity instances and their lifecycle are managed ... key, and to query over entities. The set of entities that can be managed by a given EntityManager ... , causing all managed entities to become detached. Clear the persistence context, causing all managed
Manual
15

JPA Persistence Unit

below). The jar-file elements specify JAR files that should be searched for managed persistable classes. The class elements specify names of managed persistable classes (see below). The property ... on using XML metadata can be found in the JPA and JDO specifications and books. Managed Persistable
Manual
15

Shared (L2) Entity Cache

that it manages. The persistence context serves as a first level cache. An attempt to retrieve an entity object that is already managed by the EntityManager returns the existing instance from ... is one EntityManager. This section describes a level 2  (L2) cache of entity objects, which is managed
Manual
15

Storing JPA Entity Objects

and changes its state to Managed. The new entity object is stored in the database when the transaction ... managed by the EntityManager) or by commit. Referenced Embedded Objects The following code stores ... ().commit(); Managed entity objects consume more memory than ordinary non managed Java objects