About mapping

forum_thread

connect with server

how to connect the data base on a remote server and share odbc in object db #1 2011-03-03 21:33 how to connect the data base on a remote server and share odbc in object db ...

 
forum_thread

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 ...

 
forum_thread

Threading Problem (maybe with Criteria)

Hi all I found some threading problems I do not understand: here is the the link to the testcase http://www.advolux.de/weblink%20forum/test.zip #1 2013-08-26 21:15 Hi all I found some threading problems I do not understand: After creating some testobjects (i.e. ...

 
api-jpa

javax.persistence.Table

Specifies the primary table for the annotated entity.(Annotation of JPA)

 
api-jpa

Enumerated.value

(Optional) The type used in mapping an enum type.(Annotation Element of javax.persistence.Enumerated)

 
forum_thread

Understanding limitations of schema evolution

Hi, I am trying to understand the limitations of schema evolution and have read the material on http://www.objectdb.com/java/jpa/entity/schema as well as the link therein regarding manual schema update when changing a field’s name Yet, i am confused regarding how to handle the case where one re-factors a class by moving one if it's Fields to a different class. Is this case managable? Thanks #1 2014-10-31 12:31 Hi, I am trying to understand the limitations of schema evolution and have read the material on http://www.objectdb.c ...

 
api-jpa

javax.persistence.Embeddable

Defines a class whose instances are stored as an intrinsic part of an owning entity and share the identity of the entity.(Annotation of JPA)

 
api-jpa

javax.persistence.PostPersist

Is used to specify callback methods for the corresponding lifecycle event.(Annotation of JPA)

 
api-jdo

Constants.PROPERTY_SERVER_TIME_ZONE_ID

Mapping "javax.jdo.option.ServerTimeZoneID"(Static Field of javax.jdo.Constants)

 
api-jpa

createNativeQuery(sqlString, resultSetMapping)

Create an instance of Query for executing a native SQL query.(Method of javax.persistence.EntityManager)