Package 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:

ConfigurableCacheMap.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

Nested Class Summary

Nested classes/interfaces inherited from class com.tangosol.util.Base

Base.LoggingWriter

Field Summary

Fields

Modifier and Type	Field	Description
static final BinaryMemoryCalculator	INSTANCE	Singleton BinaryMemoryCalculator instance.

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

MAP_FIXED_SIZES, MAP_PRIMITIVE_SIZES, SIZE_BASIC_OBJECT, SIZE_BIGDECIMAL, SIZE_BIGINTEGER, SIZE_BINARY, SIZE_BOOLEAN, SIZE_BYTE, SIZE_CHARACTER, SIZE_DATE, SIZE_DOUBLE, SIZE_ENTRY, SIZE_FLOAT, SIZE_INTEGER, SIZE_LONG, SIZE_OBJECT, SIZE_OBJECT_REF, SIZE_SHORT, SIZE_STRING, SIZE_TIMESTAMP

Fields inherited from class com.tangosol.util.Base

LOG_ALWAYS, LOG_CONFIG, LOG_DEBUG, LOG_ERR, LOG_INFO, LOG_MAX, LOG_MIN, LOG_QUIET, LOG_WARN, POWER_0, POWER_G, POWER_K, POWER_M, POWER_T, UNIT_D, UNIT_H, UNIT_M, UNIT_MS, UNIT_NS, UNIT_S, UNIT_US

Constructor Summary

Constructors

Constructor	Description
BinaryMemoryCalculator()

Method Summary

Modifier and Type	Method	Description
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, getEntrySize, getName, isInnerClass, padMemorySize, sizeOf, sizeOf

Methods inherited from class com.tangosol.util.Base

azzert, azzert, azzert, azzertFailed, breakLines, breakLines, capitalize, checkNotEmpty, checkNotNull, checkRange, computeSafeWaitTime, decimalValue, dup, dup, ensureBigDecimal, ensureClassLoader, ensureRuntimeException, ensureRuntimeException, equals, equalsDeep, err, err, err, err, err, escape, formatDateTime, getCallerStackFrame, getCommonMonitor, getCommonMonitor, getCommonMonitor, getContextClassLoader, getContextClassLoader, getDeepMessage, getErr, getLastSafeTimeMillis, getLog, getMaxDecDigits, getMaxHexDigits, getOriginalException, getOut, getProcessRandom, getRandom, getRandomBinary, getRandomBinary, getRandomString, getSafeTimeMillis, getStackFrame, getStackFrames, getStackTrace, getStackTrace, getStackTrace, getThreadFactory, getTimeZone, getUpTimeMillis, hashCode, hexValue, indentString, indentString, isDecimal, isHex, isLogEcho, isOctal, log, log, log, log, log, makeInteger, makeLong, makeThread, mergeArray, mergeBooleanArray, mergeByteArray, mergeCharArray, mergeDoubleArray, mergeFloatArray, mergeIntArray, mergeLongArray, mod, mod, octalValue, out, out, out, out, out, pad, parseBandwidth, parseBandwidth, parseDelimitedString, parseHex, parseHex, parseMemorySize, parseMemorySize, parsePercentage, parseTime, parseTime, parseTimeNanos, parseTimeNanos, printStackTrace, randomize, randomize, randomize, randomize, read, read, read, read, read, read, read, replace, setErr, setLog, setLogEcho, setOut, sleep, toBandwidthString, toBandwidthString, toCharEscape, toCrc, toCrc, toCrc, toCrc, toCrc, toDecString, toDelimitedString, toDelimitedString, toDelimitedString, toDelimitedString, toHex, toHex, toHexDump, toHexEscape, toHexEscape, toHexEscape, toHexEscape, toHexString, toMemorySizeString, toMemorySizeString, toQuotedCharEscape, toQuotedStringEscape, toSqlString, toString, toString, toStringEscape, toUnicodeEscape, trace, trace, trace, trace, trace, trace, trace, trace, trace, truncateString, truncateString, wait

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final BinaryMemoryCalculator INSTANCE

Singleton BinaryMemoryCalculator instance.

Constructor Details

BinaryMemoryCalculator

public BinaryMemoryCalculator()

Method Details

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 ConfigurableCacheMap.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