org.apache.ignite.internal.processors.cache.persistence.wal.crc

Class FastCrc

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.wal.crc.FastCrc

public final class FastCrc
extends Object

This CRC calculation implementation workf much faster then PureJavaCrc32

Constructor Summary

Constructors

Constructor and Description
FastCrc()

Method Summary

Modifier and Type	Method and Description
static int	calcCrc(ByteBuffer buf, int len)
static int	calcCrc(File file)
int	getValue()
void	reset() Preparation for further calculations.
void	update(ByteBuffer buf, int len)

Methods inherited from class java.lang.Object

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

Constructor Detail

FastCrc

public FastCrc()

Method Detail

reset

public void reset()

Preparation for further calculations.

getValue

public int getValue()

Returns:

crc value.

update

public void update(ByteBuffer buf,
                   int len)

Parameters:

buf - Input buffer.

len - Data length.

calcCrc

public static int calcCrc(ByteBuffer buf,
                          int len)

Parameters:

buf - Input buffer.

len - Data length.

Returns:

Crc checksum.

calcCrc

public static int calcCrc(File file)
                   throws IOException

Parameters:

file - A file to calculate checksum over it.

Returns:

CRC32 checksum.

Throws:

IOException - If fails.