/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.internal.fileheader;
import com.db4o.ext.*;
import com.db4o.internal.*;
/**
* @exclude
*/
public abstract class TimerFileLock implements Runnable{
/**
* @sharpen.remove.first
*/
public static TimerFileLock forFile(LocalObjectContainer file){
if(file.needsLockFileThread()){
return new TimerFileLockEnabled((IoAdaptedObjectContainer)file);
}
return new TimerFileLockDisabled();
}
public abstract void checkHeaderLock();
public abstract void checkOpenTime();
public abstract boolean lockFile();
public abstract long openTime();
public abstract void setAddresses(int baseAddress, int openTimeOffset, int accessTimeOffset);
public abstract void start() throws Db4oIOException;
public abstract void writeHeaderLock();
public abstract void writeOpenTime();
public abstract void close() throws Db4oIOException;
public abstract void checkIfOtherSessionAlive(LocalObjectContainer container, int address,
int offset, long lastAccessTime) throws Db4oIOException;
}