/**
* Prepare a transaction on the given EntityManager, if possible.
*
* @param em the EntityManager to prepare
* @param emf the EntityManagerFactory that the EntityManager has been created with
* @return an arbitrary object that holds transaction data, if any (to be passed into
* cleanupTransaction)
* @see JpaDialect#prepareTransaction
*/
private static Object prepareTransaction(EntityManager em, EntityManagerFactory emf) {
if (emf instanceof EntityManagerFactoryInfo) {
EntityManagerFactoryInfo emfInfo = (EntityManagerFactoryInfo) emf;
JpaDialect jpaDialect = emfInfo.getJpaDialect();
if (jpaDialect != null) {
return jpaDialect.prepareTransaction(
em,
TransactionSynchronizationManager.isCurrentTransactionReadOnly(),
TransactionSynchronizationManager.getCurrentTransactionName());
}
}
return null;
}
/** Borrowed from Seam */
public int getStatus() {
if (ptm == null) {
return TransactionManager.STATUS_NO_TRANSACTION;
}
logger.debug(
"Current TX name (According to TransactionSynchronizationManager) : "
+ TransactionSynchronizationManager.getCurrentTransactionName());
if (TransactionSynchronizationManager.isActualTransactionActive()) {
TransactionStatus transaction = null;
try {
if (currentTransaction == null) {
transaction = ptm.getTransaction(td);
if (transaction.isNewTransaction()) {
return TransactionManager.STATUS_COMMITTED;
}
} else {
transaction = currentTransaction;
}
logger.debug("Current TX: " + transaction);
// If SynchronizationManager thinks it has an active transaction but
// our transaction is a new one
// then we must be in the middle of committing
if (transaction.isCompleted()) {
if (transaction.isRollbackOnly()) {
return TransactionManager.STATUS_ROLLEDBACK;
}
return TransactionManager.STATUS_COMMITTED;
} else {
if (transaction.isRollbackOnly()) {
return TransactionManager.STATUS_ROLLEDBACK;
}
return TransactionManager.STATUS_ACTIVE;
}
} finally {
if (currentTransaction == null) {
ptm.commit(transaction);
}
}
}
return TransactionManager.STATUS_NO_TRANSACTION;
}