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Java > Open Source Codes > org > ozoneDB > core > dr > Locker


1 // You can redistribute this software and/or modify it under the terms of
2 // the Ozone Core License version 1 published by ozone-db.org.
3 //
4 // The original code and portions created by SMB are
5 // Copyright (C) 1997-@year@ by SMB GmbH. All rights reserved.
6 //
7 // $Id: Locker.java,v 1.5 2002/12/29 11:15:57 per_nyfelt Exp $
8
9 package org.ozoneDB.core.dr;
10
11 /**
12  * @author <a HREF="http://www.softwarebuero.de/">SMB</a>
13  * @version $Revision: 1.5 $Date: 2002/12/29 11:15:57 $
14  */
15 public interface Locker {
16
17
18     /**
19         Pins the Lockable which is blocks this Locker and returns it or null, if no Lockable blocks this locker.
20         The caller has to unpin it after use.
21     */
22     public Lockable blockedBy();
23
24     /**
25         Returns wether this locker is blocked.
26     */
27     public boolean isBlocked();
28
29     public void setDeadlocked(boolean to);
30
31     public boolean isDeadlocked();
32 }
33
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