Module com.aoapps.hodgepodge

Package com.aoapps.hodgepodge.io

Class SyncFile

java.lang.Object

com.aoapps.hodgepodge.io.SyncFile

public class SyncFile
extends Object

Copies one file to another, only writing the blocks of the destination file if they either didn't already exist or contain different content.

This is to useful for flash media where reads are much faster than reads and the number of write cycles is limited.

This is also useful for synchronizing data to an LVM snapshot (or a logical volume that has any snapshots), to minimize the allocated copy-on-write space.

Author:

AO Industries, Inc.

Constructor Summary

Constructors

Constructor	Description
SyncFile()

Method Summary

Modifier and Type	Method	Description
static void	main(String[] args)
static long	syncFile(InputStream in, File outFile, RandomAccessFile out)	Synchronized the input to the provided output, only writing data that doesn't already match the input.

Methods inherited from class java.lang.Object

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

Constructor Details

SyncFile

public SyncFile()

Method Details

main

public static void main(String[] args)

syncFile

public static long syncFile(InputStream in,
 File outFile,
 RandomAccessFile out)
                     throws IOException

Synchronized the input to the provided output, only writing data that doesn't already match the input. Returns the number of bytes written.

Throws:

IOException