Package org.hibernate.engine.transaction.internal.jta

Source Code of org.hibernate.engine.transaction.internal.jta.JtaTransactionFactory

/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2007-2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors.  All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA  02110-1301  USA
*/
package org.hibernate.engine.transaction.internal.jta;

import javax.transaction.SystemException;
import javax.transaction.UserTransaction;

import org.hibernate.ConnectionReleaseMode;
import org.hibernate.TransactionException;
import org.hibernate.engine.transaction.jta.platform.spi.JtaPlatform;
import org.hibernate.engine.transaction.spi.TransactionCoordinator;
import org.hibernate.engine.transaction.spi.TransactionFactory;

/**
* Factory for {@link JtaTransaction} instances.
*
* @author Gavin King
* @author Steve Ebersole
* @author Les Hazlewood
*/
public class JtaTransactionFactory implements TransactionFactory<JtaTransaction> {
  public static final String SHORT_NAME = "jta";

  @Override
  public JtaTransaction createTransaction(TransactionCoordinator transactionCoordinator) {
    return new JtaTransaction( transactionCoordinator );
  }

  @Override
  public boolean canBeDriver() {
    return true;
  }

  @Override
  public ConnectionReleaseMode getDefaultReleaseMode() {
    return ConnectionReleaseMode.AFTER_STATEMENT;
  }

  @Override
  public boolean compatibleWithJtaSynchronization() {
    return true;
  }

  @Override
  public boolean isJoinableJtaTransaction(TransactionCoordinator transactionCoordinator, JtaTransaction transaction) {
    try {
      // Essentially:
      // 1) If we have a local (Hibernate) transaction in progress
      //      and it already has the UserTransaction cached, use that
      //      UserTransaction to determine the status.
      // 2) If a transaction manager has been located, use
      //      that transaction manager to determine the status.
      // 3) Finally, as the last resort, try to lookup the
      //      UserTransaction via JNDI and use that to determine the
      //      status.
      if ( transaction != null ) {
        UserTransaction ut = transaction.getUserTransaction();
        if ( ut != null ) {
          return JtaStatusHelper.isActive( ut );
        }
      }

      final JtaPlatform jtaPlatform = transactionCoordinator
          .getTransactionContext()
          .getTransactionEnvironment()
          .getJtaPlatform();
      if ( jtaPlatform == null ) {
        throw new TransactionException( "Unable to check transaction status" );
      }
      if ( jtaPlatform.retrieveTransactionManager() != null ) {
        return JtaStatusHelper.isActive( jtaPlatform.retrieveTransactionManager().getStatus() );
      }
      else {
        final UserTransaction ut = jtaPlatform.retrieveUserTransaction();
        return ut != null && JtaStatusHelper.isActive( ut );
      }
    }
    catch ( SystemException se ) {
      throw new TransactionException( "Unable to check transaction status", se );
    }
  }

}
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