locker.java

Java的面向对象数据库系统的源代码

// You can redistribute this software and/or modify it under the terms of
// the Ozone Core License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-@year@ by SMB GmbH. All rights reserved.
//
// $Id: Locker.java,v 1.5 2002/12/29 11:15:57 per_nyfelt Exp $

package org.ozoneDB.core.dr;

/**
 * @author <a href="http://www.softwarebuero.de/">SMB</a>
 * @version $Revision: 1.5 $Date: 2002/12/29 11:15:57 $
 */
public interface Locker  {


    /**
    	Pins the Lockable which is blocks this Locker and returns it or null, if no Lockable blocks this locker.
    	The caller has to unpin it after use.
    */
    public Lockable blockedBy();

    /**
    	Returns wether this locker is blocked.
    */
    public boolean isBlocked();

    public void setDeadlocked(boolean to);

    public boolean isDeadlocked();
}