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1   /*
2    * Copyright 2004 Charles Blaxland
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package mnemosyne.archiver;
17  
18  import mnemosyne.core.PersistentRoot;
19  import mnemosyne.core.Transaction;
20  import org.apache.commons.logging.Log;
21  import org.apache.commons.logging.LogFactory;
22  
23  /***
24   * An implementation of the archiver that does not persist to durable storage.
25   * This might be useful for demos, testing, or an in memory cache that requires
26   * ACID properties.
27   *
28   * @version $Id: TransientArchiver.java,v 1.1.1.1 2004/08/07 06:40:55 charlesblaxland Exp $
29   */
30  public class TransientArchiver implements Archiver
31  {
32      private static final Log log = LogFactory.getLog(TransientArchiver.class);
33  
34      public PersistentRoot loadLatest() throws ArchiverException
35      {
36          log.info("Persistent root reloaded");
37          return null;
38      }
39  
40      public void saveSnapshot(PersistentRoot root) throws ArchiverException
41      {
42          log.info("Snapshot saved");
43      }
44  
45      public void saveTransaction(Transaction transaction) throws ArchiverException
46      {
47          log.info("Transaction saved");
48      }
49  }