01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: 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.internal.freespace;
22:
23: import com.db4o.foundation.*;
24: import com.db4o.internal.*;
25: import com.db4o.internal.slots.*;
26:
27: /**
28: * @exclude
29: */
30: public interface FreespaceManager {
31:
32: // TODO: FB delete method when FreespaceManagerIx is removed
33: public int onNew(LocalObjectContainer file);
34:
35: // TODO: FB delete method when FreespaceManagerIx is removed
36: public void beginCommit();
37:
38: // TODO: FB delete method when FreespaceManagerIx is removed
39: public void endCommit();
40:
41: public int slotCount();
42:
43: public void free(Slot slot);
44:
45: public void freeSelf();
46:
47: public int totalFreespace();
48:
49: public Slot getSlot(int length);
50:
51: public void migrateTo(FreespaceManager fm);
52:
53: public void read(int freeSpaceID);
54:
55: // TODO: FB delete method when FreespaceManagerIx is removed
56: public void start(int slotAddress);
57:
58: public byte systemType();
59:
60: public void traverse(Visitor4 visitor);
61:
62: public int write();
63:
64: public void commit();
65:
66: public Slot allocateTransactionLogSlot(int length);
67:
68: public void freeTransactionLogSlot(Slot slot);
69:
70: }
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