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Java > Open Source Codes > com > db4o > db4ounit > common > acid > CrashSimulatingIoAdapter


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10 Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11 Suite 350, San Mateo, CA 94403, USA.
12
13 db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */

21 package com.db4o.db4ounit.common.acid;
22
23 import java.io.*;
24
25 import com.db4o.io.*;
26
27
28 public class CrashSimulatingIoAdapter extends VanillaIoAdapter{
29     
30     CrashSimulatingBatch batch;
31     
32     long curPos;
33     
34     public CrashSimulatingIoAdapter(IoAdapter delegateAdapter) {
35         super(delegateAdapter);
36         batch = new CrashSimulatingBatch();
37     }
38     
39     private CrashSimulatingIoAdapter(IoAdapter delegateAdapter, String JavaDoc path, boolean lockFile, long initialLength, CrashSimulatingBatch batch) throws IOException {
40         super(delegateAdapter.open(path, lockFile, initialLength));
41         this.batch = batch;
42     }
43     
44     public IoAdapter open(String JavaDoc path, boolean lockFile, long initialLength) throws IOException {
45         return new CrashSimulatingIoAdapter(_delegate, path, lockFile, initialLength, batch);
46     }
47
48     public void seek(long pos) throws IOException {
49         curPos=pos;
50         super.seek(pos);
51     }
52     
53     public void write(byte[] buffer, int length) throws IOException {
54         super.write(buffer, length);
55         byte[] copy=new byte[buffer.length];
56         System.arraycopy(buffer, 0, copy, 0, buffer.length);
57         batch.add(copy, curPos, length);
58     }
59     
60     public void sync() throws IOException {
61         super.sync();
62         batch.sync();
63     }
64 }
65
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