oracle.toplink.essentials.internal.ejb.cmp3.transaction.base

Class EntityTransactionWrapper

java.lang.Object

oracle.toplink.essentials.internal.ejb.cmp3.transaction.base.TransactionWrapperImpl

oracle.toplink.essentials.internal.ejb.cmp3.transaction.base.EntityTransactionWrapper

Direct Known Subclasses:

EntityTransactionWrapper

public class EntityTransactionWrapper
extends TransactionWrapperImpl

INTERNAL: Base EntityTransactionWrapper The EntityTransactionWrapper is used to make in transparent to an EntityManager what kind of transaction is being used. Transaction type can either be JTATransaction or EntityTransaciton and they are mutually exclusive. This is the implementation for EntityTransaction

See Also:

EntityTransactionWrapper, oracle.toplink.essentials.internal.ejb.cmp3.transaction.jdk14.EntityTransactionWrapper

Field Summary

Fields

Modifier and Type	Field and Description
protected EntityTransactionImpl	entityTransaction

Fields inherited from class oracle.toplink.essentials.internal.ejb.cmp3.transaction.base.TransactionWrapperImpl

entityManager, localUOW, txnKey

Constructor Summary

Constructors

Constructor and Description
EntityTransactionWrapper(EntityManagerImpl entityManager)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	checkForTransaction(boolean validateExistence) INTERNAL: This method will be used to check for a transaction and throws exception if none exists.
EntityManagerImpl	getEntityManager()
RepeatableWriteUnitOfWork	getTransactionalUnitOfWork(java.lang.Object transaction) INTERNAL: THis method is used to get the active UnitOfWork.
void	registerUnitOfWorkWithTxn(UnitOfWorkImpl uow)
void	setRollbackOnlyInternal() Mark the current transaction so that the only possible outcome of the transaction is for the transaction to be rolled back.
boolean	shouldFlushBeforeQuery(UnitOfWorkImpl uow) This method will be called when a query is executed.
protected void	throwCheckTransactionFailedException()

Methods inherited from class oracle.toplink.essentials.internal.ejb.cmp3.transaction.base.TransactionWrapperImpl

clear, getLocalUnitOfWork, setLocalUnitOfWork

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

entityTransaction

protected EntityTransactionImpl entityTransaction

Constructor Detail

EntityTransactionWrapper

public EntityTransactionWrapper(EntityManagerImpl entityManager)

Method Detail

checkForTransaction

public java.lang.Object checkForTransaction(boolean validateExistence)

INTERNAL: This method will be used to check for a transaction and throws exception if none exists. If this methiod returns without exception then a transaction exists. This method must be called before accessing the localUOW.

Specified by:

checkForTransaction in class TransactionWrapperImpl

getTransactionalUnitOfWork

public RepeatableWriteUnitOfWork getTransactionalUnitOfWork(java.lang.Object transaction)

INTERNAL: THis method is used to get the active UnitOfWork. It is special in that it will return the required RepeatableWriteUnitOfWork required by the EntityManager. Once RepeatableWrite is merged into existing UnitOfWork this code can go away.

Specified by:

getTransactionalUnitOfWork in class TransactionWrapperImpl

Returns:

getEntityManager

public EntityManagerImpl getEntityManager()

registerUnitOfWorkWithTxn

public void registerUnitOfWorkWithTxn(UnitOfWorkImpl uow)

Specified by:

registerUnitOfWorkWithTxn in class TransactionWrapperImpl

setRollbackOnlyInternal

public void setRollbackOnlyInternal()

Mark the current transaction so that the only possible outcome of the transaction is for the transaction to be rolled back. This is an internal method and if the txn is not active will do nothing

Specified by:

setRollbackOnlyInternal in class TransactionWrapperImpl

shouldFlushBeforeQuery

public boolean shouldFlushBeforeQuery(UnitOfWorkImpl uow)

Description copied from class: TransactionWrapperImpl

This method will be called when a query is executed. If changes in the entity manager should be flushed this method should return true

Specified by:

shouldFlushBeforeQuery in class TransactionWrapperImpl

throwCheckTransactionFailedException

protected void throwCheckTransactionFailedException()