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Unexpected NoSuchFieldError exception

.9_09] javax.persistence.PersistenceException Attempt to begin a new transaction when a transaction is active (error 612) at com.objectdb.jpa.EMImpl.begin(EMImpl.java:275) at javax.persistence.EntityTransaction$begin.call(Unknown Source) at app.database.ObjectDbDatabase.transact(ObjectDbDatabase
2

javax.persistence.EntityTransaction

begin() Start a resource transaction. Start a resource transaction. Throws: IllegalStateException
0

javax.jdo.JDOEntityManager

one or more of the application key fields, then this method returns the identity as of the beginning ... . The EntityTransaction instance may be used serially to begin and commit multiple transactions. Returns
0

javax.jdo.spi.PersistenceCapable

, this method returns the object id as of the beginning of the current transaction. Returns: a copy of the ObjectId of this instance as of the beginning of the transaction. Since: JDO 1.0
0

setRestoreValues(restoreValues)

instances are restored to their values as of the beginning of the transaction, and the instances revert ... types are restored to their values as of the beginning of the transaction. If false, at rollback
0

jdoGetObjectId()

the transaction, this method returns the object id as of the beginning of the current transaction. Returns: a copy of the ObjectId of this instance as of the beginning of the transaction. Since: JDO 1.0
0

setRestoreValues(restoreValues)

Method javax.jdo.Transaction void setRestoreValues( boolean restoreValues ) If true, at rollback, fields of newly persistent instances are restored to their values as of the beginning ... types and immutable reference types are restored to their values as of the beginning
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getObjectId(pc)

of the ObjectId of the parameter instance as of the beginning of the transaction. Since: JDO 1.0
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getObjectId(pc)

returns the identity as of the beginning of the transaction. The value returned by getObjectId
0

getObjectId(pc)

Method javax.jdo.spi.StateManager Object getObjectId( PersistenceCapable pc ) Return the object representing the JDO identity of the calling instance. If the JDO identity is being changed in the current transaction, this method returns the identity as of the beginning of the transaction. Parameters

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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