FastCrc (Ignite 2.17.0)

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 Description

FastCrc()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static int`	`calcCrc(File file)`
`static int`	`calcCrc(ByteBuffer buf, int len)`
`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.