/***
    * Redistribution and use of this software and associated documentation
    * ("Software"), with or without modification, are permitted provided
    * that the following conditions are met:
    *
    * 1. Redistributions of source code must retain copyright
    *    statements and notices.  Redistributions must also contain a
    *    copy of this document.
    *
   * 2. Redistributions in binary form must reproduce the
   *    above copyright notice, this list of conditions and the
   *    following disclaimer in the documentation and/or other
   *    materials provided with the distribution.
   *
   * 3. The name "Exolab" must not be used to endorse or promote
   *    products derived from this Software without prior written
   *    permission of Exoffice Technologies.  For written permission,
   *    please contact info@exolab.org.
   *
   * 4. Products derived from this Software may not be called "Exolab"
   *    nor may "Exolab" appear in their names without prior written
   *    permission of Exoffice Technologies. Exolab is a registered
   *    trademark of Exoffice Technologies.
   *
   * 5. Due credit should be given to the Exolab Project
   *    (http://www.exolab.org/).
   *
   * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
   * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
   * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * Copyright 1999 (C) Exoffice Technologies Inc. All Rights Reserved.
   *
   * $Id: NullTransactionManager.java,v 1.2 2003/08/07 13:33:12 tanderson Exp $
   *
   * Date         Author  Changes
   * 07/02/2001   jima    Created
   */
  package org.exolab.jms.transaction;
  
  import javax.transaction.Synchronization;
  import javax.transaction.Transaction;
  import javax.transaction.TransactionManager;
  import javax.transaction.xa.XAResource;
  
  
  /***
   * This class instantiates the NullTransactionManager, which is used in place
   * of a real transaction manager. In particular it is used for the JDBM database
   * <p>
   * This is really an interim solution to support JDBM, with most of the methods
   * having an empty body.
   *
   * @version     $Revision: 1.2 $ $Date: 2003/08/07 13:33:12 $
   * @author      <a href="mailto:jima@exoffice.com">Jim Alateras</a>
   **/
  public class NullTransactionManager implements TransactionManager {
  
      // implementation of TransactionManager.begin
      public void begin() {
          // null operation
      }
  
      // implementation of TransactionManager.commit
      public void commit() {
          // null operation
      }
  
      // implementation of TransactionManager.rollback
      public void rollback() {
          // null operation
      }
  
      // implementation of TransactionManager.getStatus
      public int getStatus() {
          return 0;
      }
  
      // implementation of TransactionManager.getTransaction
      public Transaction getTransaction() {
          return new NullTransaction();
      }
  
      // implementation of TransactionManager.resume
      public void resume(Transaction transaction) {
          // null operation
      }
  
      // implementation of TransactionManager.setRollbackOnly
      public void setRollbackOnly() {
         // null operation
     }
 
     // implementation of TransactionManager.setTransactionTimeout
     public void setTransactionTimeout(int timeout) {
         // null implementation
     }
 
     // implementation of TransactionManager.suspend
     public Transaction suspend() {
         return new NullTransaction();
     }
 }
 
 
 /***
  * The NullTransaction is part of the NullTransactionManager support
  * with most methods implemented with empty bodies
  */
 class NullTransaction implements javax.transaction.Transaction {
 
     // implementation Transaction.commit
     public void commit() {
         // null implementation
     }
 
     // implementation Transaction.delistResource
     public boolean delistResource(XAResource a, int b) {
         return false;
     }
 
     // implementation Transaction.rollback
     public void rollback() {
         // null implementation
     }
 
     // implementation Transaction.enlistResource
     public boolean enlistResource(XAResource a) {
         return false;
     }
 
     // implementation Transaction.getStatus
     public int getStatus() {
         return 0;
     }
 
     // implementation Transaction.registerSynchronization
     public void registerSynchronization(Synchronization a) {
         // null implementation
     }
 
     // implementation Transaction.setRollbackOnly
     public void setRollbackOnly() {
         // null implementation
     }
 }