Package com.simplicite.util.tools

Class SizeOfTool

java.lang.Object

com.simplicite.util.tools.SizeOfTool

public class SizeOfTool
extends java.lang.Object

Toolbox to manage size of objects,

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	SizeOfTool.CacheMetric	Cache metrics

Field Summary

Fields

Modifier and Type	Field	Description
static SizeOfTool	INSTANCE
static int	SIZE_CLASS
static int	SIZE_POINTER

Constructor Summary

Constructors

Constructor	Description
SizeOfTool()

Method Summary

Modifier and Type	Method	Description
static java.util.List<SizeOfTool.CacheMetric>	getMetrics(long limit, boolean fast)
static java.util.List<SizeOfTool.CacheMetric>	getMetrics(com.simplicite.util.engine.MemoryCache cache, long limit, boolean fast, java.util.List<SizeOfTool.CacheMetric> result)	Overview of object cache in memory
static java.util.List<SizeOfTool.CacheMetric>	getObjectMetrics(long limit, boolean fast)
static long	getObjectSize(java.lang.Object o, boolean fast)	Get the memory used by the object
static int	getPrimitiveFieldSize(java.lang.Class<?> c)
static java.util.List<SizeOfTool.CacheMetric>	getProcessMetrics(long limit, boolean fast)
static long	roundUp(long size, int round)
static long	sizeOf(java.io.Serializable o)	Get the size of the serialized object (fast approximation of object size)
static long	sizeOf(java.lang.Object obj, boolean deep)	Object size approximation (slow)
static long	sizeOf(java.lang.Object obj, boolean deep, boolean trace)	Object size approximation

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final SizeOfTool INSTANCE

SIZE_POINTER

public static final int SIZE_POINTER

See Also:

Constant Field Values

SIZE_CLASS

public static final int SIZE_CLASS

See Also:

Constant Field Values

Constructor Detail

SizeOfTool

public SizeOfTool()

Method Detail

getMetrics

public static java.util.List<SizeOfTool.CacheMetric> getMetrics(com.simplicite.util.engine.MemoryCache cache,
                                                                long limit,
                                                                boolean fast,
                                                                java.util.List<SizeOfTool.CacheMetric> result)

Overview of object cache in memory

Parameters:

limit - limit return size (0=no limit)

fast - use serialization method, faster than fields reflection/inspection

Returns:

list of memory approximation sorted by sizes

getObjectSize

public static long getObjectSize(java.lang.Object o,
                                 boolean fast)

Get the memory used by the object

Parameters:

o - Any object

fast - based on serialization (fast approximation) or reflection (slower)

Returns:

memory size (Bytes)

getObjectMetrics

public static java.util.List<SizeOfTool.CacheMetric> getObjectMetrics(long limit,
                                                                      boolean fast)

getProcessMetrics

public static java.util.List<SizeOfTool.CacheMetric> getProcessMetrics(long limit,
                                                                       boolean fast)

getMetrics

public static java.util.List<SizeOfTool.CacheMetric> getMetrics(long limit,
                                                                boolean fast)

sizeOf

public static long sizeOf(java.io.Serializable o)

Get the size of the serialized object (fast approximation of object size)

Returns:

memory size approximation (Bytes), based on serialized objects

sizeOf

public static long sizeOf(java.lang.Object obj,
                          boolean deep)

Object size approximation (slow)

Parameters:

obj - Any object

deep - Deep count

Returns:

Size approximation based on fields reflection

sizeOf

public static long sizeOf(java.lang.Object obj,
                          boolean deep,
                          boolean trace)

Object size approximation

Parameters:

obj - Any object

deep - Deep count

trace - Log object structure

Returns:

Size approximation based on fields reflection

roundUp

public static long roundUp(long size,
                           int round)

getPrimitiveFieldSize

public static int getPrimitiveFieldSize(java.lang.Class<?> c)