org.mapdb

Class DataIO.HeartbeatFileLock

java.lang.Object

org.mapdb.DataIO.HeartbeatFileLock

Enclosing class:

DataIO

public static final class DataIO.HeartbeatFileLock
extends Object

File locking mechanism. Creates '*.lock' file and starts background thread to periodically modify it. If JVM dies, file gets old and expires.

See Also:

DBMaker.Maker.fileLockHeartbeatEnable()

Constructor Summary

Constructors

Constructor and Description
DataIO.HeartbeatFileLock(File file, int sleep)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	delete()
File	getFile()
boolean	isLocked()
void	lock()
void	setQuitAfterGCed(Object object)
void	unlock() Unlock the file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataIO.HeartbeatFileLock

public DataIO.HeartbeatFileLock(File file,
                        int sleep)

Method Detail

setQuitAfterGCed

public void setQuitAfterGCed(Object object)

lock

public void lock()

unlock

public void unlock()

Unlock the file. The watchdog thread is stopped. This method does nothing if the file is already unlocked.

delete

protected void delete()

isLocked

public boolean isLocked()

getFile

public File getFile()