Fast Object Database for Java - with JPA/JDO support

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Whether this foreign key is deferred (constraint is checked only at commit). Whether this foreign key is deferred (constraint is checked only at commit). Returns: whether this foreign key is deferred


Method javax.jdo.Transaction void setRollbackOnly() Sets the rollback-only status of the transaction to true. After this flag is set to true, the transaction can no longer be committed, and any attempt to commit the transaction will throw JDOFatalDataStoreException. Since: JDO 2.0


: Serializable Thrown by the persistence provider when EntityTransaction.commit() fails. Since: JPA 1.0 See Also: javax.persistence.EntityTransaction.commit() RollbackException() Constructs a new

OutofMemory error with Object DB 2.0

and inserts 200 records at a time. The transaction obtained from the PersistentManager is commited ... after every commit or how do I resolve this issue. Please help ... .commit( at Source

evictAll() behavior

the current PersistenceManager - it is useful only to see changes that have been committed by ... one transaction and i want to reclaim memory after commit or even better after flush but I ... size before commit= " + pm.getManagedObjects().size()); pm.currentTransaction().commit(); pm

Internal exception when updating date filed (TemporalType.DATE)

Hello! ObjectDB version 2.5.3_02. I get internal exception when commiting update Date field (javax ... to commit transaction: (error 613) at com.objectdb.jpa.EMImpl.commit( ... ) at com.objectdb.o.OBM.bJ( at com.objectdb.jpa.EMImpl.commit( ... 2

Database size is much larger than expected (x2)

Exception in thread "main" [ObjectDB 2.2.9_03] javax.persistence.RollbackExcepti on Failed to commit transaction: Java heap space (error 613)         at com.objectdb.jpa.EMImpl.commit( ... )         at com.objectdb.jpa.EMImpl.commit(         ... 2 more Question 1 : Why objectdb cause

Insertion Speed Rate and Batch Load

. Attached a modified version of your file that commits once per 10,000 entity objects ... )             {                 em.getTransaction().commit();                 em.getTransaction().begin();             }         }         em.getTransaction().commit();         long time

Performance in large transactions

= create10000Entites(); entityManager.merge(entities); x.end += 1; transaction.commit ... = create10000Entites();     entityManager.merge(entities);     //query     x.end += 1; } transaction.commit ... transaction, i.e. when there are no updates to the database since the last commit, is more efficient

Remove an entity which attributes were changed - OptimisticLockException

the entity from the database. After commit the transaction an exception is caused with optimistic lock ... , it works well. Why the ObjectDB want to commit the changes of the entity although the entity ... it. User 2 retrieves an object, removes it and commit. This should work if the changes of user 1

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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