FilePadding (Apache ZooKeeper - Server 3.9.1 API)

java.lang.Object
- org.apache.zookeeper.server.persistence.FilePadding

```
public class FilePadding
extends Object
```

Constructor Summary

Constructors
Constructor Description

FilePadding()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static long`	`calculateFileSizeWithPadding(long position, long fileSize, long preAllocSize)`	Calculates a new file size with padding.
`static long`	`getPreAllocSize()`	Getter of preAllocSize has been added for testing
`void`	`setCurrentSize(long currentSize)`
`static void`	`setPreallocSize(long size)`	method to allow setting preallocate size of log file to pad the file.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FilePadding
```
public FilePadding()
```
- Method Detail
  - getPreAllocSize
```
public static long getPreAllocSize()
```
    Getter of preAllocSize has been added for testing
  - setPreallocSize
```
public static void setPreallocSize(long size)
```
    method to allow setting preallocate size of log file to pad the file.
    
    Parameters:
    
    size - the size to set to in bytes
  - setCurrentSize
```
public void setCurrentSize(long currentSize)
```
  - calculateFileSizeWithPadding
```
public static long calculateFileSizeWithPadding(long position,
                                                long fileSize,
                                                long preAllocSize)
```
    Calculates a new file size with padding. We only return a new size if the current file position is sufficiently close (less than 4K) to end of file and preAllocSize is > 0.
    
    Parameters:
    
    position - the point in the file we have written to
    
    fileSize - application keeps track of the current file size
    
    preAllocSize - how many bytes to pad
    
    Returns:
    
    the new file size. It can be the same as fileSize if no padding was done.