org.bitcoinj.store

Class WindowsMMapHack

java.lang.Object

org.bitcoinj.store.WindowsMMapHack

public class WindowsMMapHack
extends Object

This class knows how to force an mmap'd ByteBuffer to reliquish its file handles before it becomes garbage collected, by exploiting implementation details of the HotSpot JVM implementation.

This is required on Windows because otherwise an attempt to delete a file that is still mmapped will fail. This can happen when a user requests a "restore from seed" function, which involves deleting and recreating the chain file. At some point we should stop using mmap in SPVBlockStore and we can then delete this class.

It is a separate class to avoid hitting unknown imports when running on other JVMs.

Constructor Summary

Constructors

Constructor and Description
WindowsMMapHack()

Method Summary

Modifier and Type	Method and Description
static void	forceRelease(MappedByteBuffer buffer)

Methods inherited from class java.lang.Object

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

Constructor Detail

WindowsMMapHack

public WindowsMMapHack()

Method Detail

forceRelease

public static void forceRelease(MappedByteBuffer buffer)