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1   /*
2    * ModeShape (http://www.modeshape.org)
3    * See the COPYRIGHT.txt file distributed with this work for information
4    * regarding copyright ownership.  Some portions may be licensed
5    * to Red Hat, Inc. under one or more contributor license agreements.
6    * See the AUTHORS.txt file in the distribution for a full listing of 
7    * individual contributors.
8    *
9    * ModeShape is free software. Unless otherwise indicated, all code in ModeShape
10   * is licensed to you under the terms of the GNU Lesser General Public License as
11   * published by the Free Software Foundation; either version 2.1 of
12   * the License, or (at your option) any later version.
13   * 
14   * ModeShape is distributed in the hope that it will be useful,
15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17   * Lesser General Public License for more details.
18   *
19   * You should have received a copy of the GNU Lesser General Public
20   * License along with this software; if not, write to the Free
21   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
23   */
24  package org.modeshape.connector.store.jpa.model.simple;
25  
26  import javax.persistence.EntityTransaction;
27  import net.jcip.annotations.Immutable;
28  import org.modeshape.graph.connector.map.MapRepositoryTransaction;
29  
30  /**
31   * A {@link MapRepositoryTransaction} that wraps an {@link EntityTransaction}.
32   */
33  @Immutable
34  public class SimpleJpaTransaction implements MapRepositoryTransaction {
35      private final EntityTransaction txn;
36  
37      /**
38       * Create a transaction to wrap an {@link EntityTransaction}.
39       * 
40       * @param txn the entity transaction, which may be null if there is none
41       */
42      SimpleJpaTransaction( EntityTransaction txn ) {
43          this.txn = txn;
44      }
45  
46      /**
47       * {@inheritDoc}
48       * 
49       * @see org.modeshape.graph.connector.map.MapRepositoryTransaction#commit()
50       */
51      public void commit() {
52          if (txn != null) txn.commit();
53      }
54  
55      /**
56       * {@inheritDoc}
57       * 
58       * @see org.modeshape.graph.connector.map.MapRepositoryTransaction#rollback()
59       */
60      public void rollback() {
61          if (txn != null) this.txn.rollback();
62      }
63  
64  }