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Manual
2

Obtaining a JPA Database Connection

to be able to generate an EntityManagerFactory. But when using ObjectDB you can either define a standard
Manual
2

Defining a JPA Entity Class

keys,  including composite primary keys and automatic sequential value generation
Manual
2

Database Replication and Clustering

databases on the slave server are automatically generated under a special root directory
Forum
2

em.flush(); em.clear(); loosing data and not persisting managed objects

thread "main" [ObjectDB 2.2.3_06] Unexpected exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.6.0_24 (on Linux 2.6.32-71.24.1.el6.x86_64). Please report this error on http://www ... you for this bug report. Build 2.2.3_09 should fix it. As a side note - ObjectDB doesn't limit
JDO Doc
2

javax.jdo.annotations.Key

.1 String foreignKey Name for a generated foreign key constraint. Name for a generated foreign key constraint. Returns: the name of the generated foreign key constraint Default value: "" Since: JDO 2.1 String generateForeignKey Generate or assume a foreign key constraint exists on the column or
JDO Doc
2

javax.jdo.annotations.Value

: the vendor extensions Default value: {} Since: JDO 2.1 String foreignKey Name for a generated foreign key constraint. Name for a generated foreign key constraint. Returns: the name of the generated foreign key constraint Default value: "" Since: JDO 2.1 String generateForeignKey Generate or assume
Issue
2

Sometimes the ObjectDB throws an internal expeption if a persist() was executed

) Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_51 (on Windows 7 6.1). Please report this error ... [ObjectDB 2.6.6_08] 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.objectdb.com/database/issue/new
Issue
2

Unexpected error when loading all entity instance

990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_74 (on Windows 10 10.0). Please report ... : Exception in thread "main" [ObjectDB 2.6.9_05] Unexpected exception (Error 990)   Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_74 (on Windows 10 10.0). Please report this error on http://www
Issue
2

objectdb-2.6.9_06: Extended Persistence Context fails: 'Attempt to begin a new transaction when a transaction is active'

_Generated__ExtProjectBuilder__Intf____Bean__.buildProject(Unknown Source) at com.greensoft.objectdb.test ... " entity, but this has no consequence for the problems reported.) The client @Singleton @Startup ... You get this originally reported error: 'com.objectdb.o.UserException: Attempt to begin a new transaction
Issue
2

Explorer bug ? Objects seem to be missing from database in Class view, but are present as references

of ObjectDB and report my client, the end-customer (without having to tell them of further bugs in ... it is a critical bug - it is not the Explorer but somehow your application generated a broken database ... that you have reported till now are related to using flush extensively (many times until commit