ome.io.nio

Class SimpleBackOff

java.lang.Object

ome.io.nio.SimpleBackOff

All Implemented Interfaces:

BackOff

public class SimpleBackOff
extends java.lang.Object
implements BackOff

Basic BackOff implementation which attempts several writes of the default block size on startup, and uses that as a scaling factor for all subsequent calculations.

Since:

Beta4.3.1

Author:

Josh Moore, josh at glencoesoftware.com

See Also:

ticket 5910

Field Summary

Fields

Modifier and Type	Field and Description
protected int	count
protected long	defaultValue
protected long	maxPixels
protected double	scalingFactor
protected TileSizes	sizes
protected double	warmUpFactor

Constructor Summary

Constructors

Constructor and Description
SimpleBackOff()
SimpleBackOff(TileSizes sizes)
SimpleBackOff(TileSizes sizes, long defaultValue, long maxPixels)

Method Summary

Modifier and Type	Method and Description
protected double	calculate()
protected long	calculate(Pixels pixels)
protected int	countTiles(Pixels pixels)
int	getCount()
double	getScalingFactor()
double	getWarmUpFactor()
void	throwMissingPyramidException(java.lang.String msg, Pixels pixels)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

scalingFactor

protected final double scalingFactor

warmUpFactor

protected final double warmUpFactor

count

protected final int count

sizes

protected final TileSizes sizes

maxPixels

protected final long maxPixels

defaultValue

protected final long defaultValue

Constructor Detail

SimpleBackOff

public SimpleBackOff()

SimpleBackOff

public SimpleBackOff(TileSizes sizes)

SimpleBackOff

public SimpleBackOff(TileSizes sizes,
                     long defaultValue,
                     long maxPixels)

Method Detail

getCount

public int getCount()

getScalingFactor

public double getScalingFactor()

getWarmUpFactor

public double getWarmUpFactor()

throwMissingPyramidException

public void throwMissingPyramidException(java.lang.String msg,
                                         Pixels pixels)

Specified by:

throwMissingPyramidException in interface BackOff

calculate

protected long calculate(Pixels pixels)

countTiles

protected int countTiles(Pixels pixels)

calculate

protected double calculate()
                    throws java.lang.Exception

Throws:

java.lang.Exception

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object