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Java > Open Source Codes > org > myoodb > core > AbstractLock


1 ///////////////////////////////////////////////////////////////////////////////
2 //
3 // Copyright (C) 2003-@year@ by Thomas M. Hazel, MyOODB (www.myoodb.org)
4 //
5 // All Rights Reserved
6 //
7 // This program is free software; you can redistribute it and/or modify
8 // it under the terms of the GNU General Public License and GNU Library
9 // General Public License as published by the Free Software Foundation;
10 // either version 2, or (at your option) any later version.
11 //
12 // This program is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License and GNU Library General Public License
16 // for more details.
17 //
18 // You should have received a copy of the GNU General Public License
19 // and GNU Library General Public License along with this program; if
20 // not, write to the Free Software Foundation, 675 Mass Ave, Cambridge,
21 // MA 02139, USA.
22 //
23 ///////////////////////////////////////////////////////////////////////////////
24 package org.myoodb.core;
25
26 import java.io.Serializable JavaDoc;
27
28 public abstract interface AbstractLock extends Serializable JavaDoc
29 {
30     public final static int NOT_ACQUIRED = -1;
31     public final static int ACCESS_NONE = 0;
32     public final static int ACCESS_READ = 1;
33     public final static int ACCESS_WRITE = 2;
34     public final static int ACCESS_MIGHTY_WRITE = 3;
35     public final static int ACCESS_MAX = 4;
36
37     public int tryAcquire(AbstractTransaction tx, int level);
38
39     public void release(AbstractTransaction tx);
40
41     public long getLockIdentifier();
42
43     public int getLockLevel(AbstractTransaction tx);
44
45     public int getLockLevel();
46
47     public void reset();
48 }
49
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