com.tangosol.net.cache
Class BinaryMemoryCalculator

java.lang.Object
  com.tangosol.util.Base
      com.tangosol.net.cache.SimpleMemoryCalculator
          com.tangosol.net.cache.BinaryMemoryCalculator

All Implemented Interfaces:

OldCache.UnitCalculator

public class BinaryMemoryCalculator
extends SimpleMemoryCalculator

A UnitCalculator implementation that weighs a cache entry based upon the amount of physical memory (in bytes) required to store the entry.

This implementation can only determine an accurate entry size if both the entry key and value are Binary objects; otherwise, an exception will be thrown during the unit calculation.

Author:

jh 2005.12.14

Field Summary

static BinaryMemoryCalculator

INSTANCE Singleton BinaryMemoryCalculator instance.

Fields inherited from class com.tangosol.net.cache.SimpleMemoryCalculator

MAP_FIXED_SIZES, SIZE_BINARY, SIZE_BOOLEAN, SIZE_BYTE, SIZE_CHARACTER, SIZE_DOUBLE, SIZE_ENTRY, SIZE_FLOAT, SIZE_INTEGER, SIZE_LONG, SIZE_OBJECT, SIZE_OBJECT_REF, SIZE_SHORT, SIZE_STRING

Constructor Summary

BinaryMemoryCalculator()

Method Summary

int	calculateUnits(Object oKey, Object oValue) Calculate the approximate number of bytes required to cache the given Binary key and value.
static void	main(String[] asArg) Unit test.

Methods inherited from class com.tangosol.net.cache.SimpleMemoryCalculator

calculateShallowSize, padMemorySize, sizeOf, sizeOf

Field Detail

INSTANCE

public static final BinaryMemoryCalculator INSTANCE

Singleton BinaryMemoryCalculator instance.

Constructor Detail

BinaryMemoryCalculator

public BinaryMemoryCalculator()

Method Detail

calculateUnits

public int calculateUnits(Object oKey,
                          Object oValue)

Calculate the approximate number of bytes required to cache the given Binary key and value.

Specified by:

calculateUnits in interface OldCache.UnitCalculator

Overrides:

calculateUnits in class SimpleMemoryCalculator

Parameters:

oKey - the key

oValue - the value

Returns:

the number of bytes of memory necessary to cache the given key and value

main

public static void main(String[] asArg)

Unit test.

Usage:

 java com.tangosol.net.cache.BinaryMemoryCalculator
 

Parameters:

asArg - command line arguments