| package org.apache.aries.tx.control.jpa.xa.impl; |
| |
| import static org.osgi.service.transaction.control.TransactionStatus.NO_TRANSACTION; |
| |
| import java.util.UUID; |
| |
| import javax.persistence.EntityManager; |
| import javax.persistence.EntityManagerFactory; |
| import javax.persistence.PersistenceException; |
| |
| import org.apache.aries.tx.control.jpa.common.impl.EntityManagerWrapper; |
| import org.apache.aries.tx.control.jpa.common.impl.ScopedEntityManagerWrapper; |
| import org.apache.aries.tx.control.jpa.common.impl.TxEntityManagerWrapper; |
| import org.osgi.service.transaction.control.TransactionContext; |
| import org.osgi.service.transaction.control.TransactionControl; |
| import org.osgi.service.transaction.control.TransactionException; |
| |
| public class XATxContextBindingEntityManager extends EntityManagerWrapper { |
| |
| private final TransactionControl txControl; |
| private final UUID resourceId; |
| private final EntityManagerFactory emf; |
| |
| |
| public XATxContextBindingEntityManager(TransactionControl txControl, |
| EntityManagerFactory emf, UUID resourceId) { |
| this.txControl = txControl; |
| this.emf = emf; |
| this.resourceId = resourceId; |
| } |
| |
| @Override |
| protected final EntityManager getRealEntityManager() { |
| |
| TransactionContext txContext = txControl.getCurrentContext(); |
| |
| if (txContext == null) { |
| throw new TransactionException("The resource " + emf |
| + " cannot be accessed outside of an active Transaction Context"); |
| } |
| |
| EntityManager existing = (EntityManager) txContext.getScopedValue(resourceId); |
| |
| if (existing != null) { |
| return existing; |
| } |
| |
| EntityManager toReturn; |
| EntityManager toClose; |
| |
| try { |
| if (txContext.getTransactionStatus() == NO_TRANSACTION) { |
| toClose = emf.createEntityManager(); |
| toReturn = new ScopedEntityManagerWrapper(toClose); |
| } else if (txContext.supportsXA()) { |
| toClose = emf.createEntityManager(); |
| toReturn = new TxEntityManagerWrapper(toClose); |
| toClose.joinTransaction(); |
| } else { |
| throw new TransactionException( |
| "There is a transaction active, but it does not support local participants"); |
| } |
| } catch (Exception sqle) { |
| throw new TransactionException( |
| "There was a problem getting hold of a database connection", |
| sqle); |
| } |
| |
| |
| txContext.postCompletion(x -> { |
| try { |
| toClose.close(); |
| } catch (PersistenceException sqle) { |
| // TODO log this |
| } |
| }); |
| |
| txContext.putScopedValue(resourceId, toReturn); |
| |
| return toReturn; |
| } |
| } |