01: /*
02: This source file is part of Smyle, a database library.
03: For up-to-date information, see http://www.drjava.de/smyle
04: Copyright (C) 2001 Stefan Reich (doc@drjava.de)
05:
06: This library is free software; you can redistribute it and/or
07: modify it under the terms of the GNU Lesser General Public
08: License as published by the Free Software Foundation; either
09: version 2.1 of the License, or (at your option) any later version.
10:
11: This library is distributed in the hope that it will be useful,
12: but WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: Lesser General Public License for more details.
15:
16: You should have received a copy of the GNU Lesser General Public
17: License along with this library; if not, write to the Free Software
18: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19:
20: For full license text, see doc/license/lgpl.txt in this distribution
21: */
22:
23: package drjava.smyle.core;
24:
25: import java.io.*;
26: import java.util.*;
27: import org.artsProject.mcop.*;
28:
29: public interface Disk {
30: public interface NewFile {
31: public long getId();
32:
33: public OutputStream getOutputStream() throws IOException;
34: }
35:
36: public NewFile createFile();
37:
38: /** atomically create and fill master file */
39: public long saveMaster(Buffer data);
40:
41: /** returns the current master file id, or 0 if there is no master file */
42: public long getMasterFile();
43:
44: public InputStream readFile(long id) throws IOException;
45:
46: public int getFileLength(long id);
47:
48: public void deleteEverything();
49:
50: public void deleteEverythingBut(Set<FileRef> whiteList);
51:
52: /** for calculation of totalBytesWritten() */
53: public void setClusterSize(int bytes);
54:
55: public long totalBytesWritten();
56:
57: /** state that disk object isn't needed anymore; clear locks if any */
58: public void release();
59: }
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