01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source 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, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: *
23: * Free Software Foundation, Inc.
24: * 59 Temple Place, Suite 330
25: * Boston, MA 02111-1307 USA
26: *
27: * @author Scott Ferguson
28: */
29:
30: package com.caucho.db.store;
31:
32: import java.io.IOException;
33:
34: /**
35: * Represents a raw-single transaction.
36: */
37: public class RawTransaction extends StoreTransaction {
38: private static final RawTransaction XA = new RawTransaction();
39:
40: private RawTransaction() {
41: }
42:
43: public static RawTransaction create() {
44: return XA;
45: }
46:
47: /**
48: * Returns a read block.
49: */
50: public Block readBlock(Store store, long blockAddress)
51: throws IOException {
52: return store.readBlock(blockAddress);
53: }
54:
55: /**
56: * Returns a modified block.
57: */
58: public Block createWriteBlock(Block block) throws IOException {
59: return block;
60: }
61:
62: /**
63: * Adds an update block
64: */
65: public void addUpdateBlock(Block block) throws IOException {
66: }
67:
68: /**
69: * Returns a modified block.
70: */
71: public Block createAutoCommitWriteBlock(Block block)
72: throws IOException {
73: return block;
74: }
75: }
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