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Java > Open Source Codes > com > caucho > db > store > WriteBlock


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * 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 com.caucho.log.Log;
33 import com.caucho.util.L10N;
34
35 import java.io.IOException JavaDoc;
36 import java.util.logging.Logger JavaDoc;
37
38 /**
39  * Represents a write (dirty) block.
40  */
41 abstract public class WriteBlock extends Block {
42   private static final Logger JavaDoc log = Log.open(WriteBlock.class);
43   private static final L10N L = new L10N(WriteBlock.class);
44
45   protected Block _block;
46
47   public WriteBlock(Block block)
48     throws IOException JavaDoc
49   {
50     super(block.getStore(), block.getBlockId());
51
52     _block = block;
53
54     allocate();
55   }
56
57   /* XXX: need this?
58   public void setDirty(int min, int max)
59   {
60   }
61
62   /**
63    * Closes the write block.
64    */
65   void destroy()
66   {
67     Block block = _block;
68     _block = null;
69
70     block.free();
71
72     throw new IllegalStateException JavaDoc();
73     //close();
74 }
75
76   public String JavaDoc toString()
77   {
78     return "WriteBlock[" + getStore() + "," + getBlockId() / Store.BLOCK_SIZE + "]";
79   }
80 }
81
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