net.sf.ehcache.pool.sizeof
Class SizeOf

java.lang.Object
  net.sf.ehcache.pool.sizeof.SizeOf

Direct Known Subclasses:

AgentSizeOf, ReflectionSizeOf, UnsafeSizeOf

public abstract class SizeOf
extends Object

Abstract sizeOf for Java. It will rely on a proper sizeOf to measure sizes of entire object graphs

Author:

Alex Snaps

Constructor Summary

SizeOf(SizeOfFilter fieldFilter, boolean caching)
Builds a new SizeOf that will filter fields according to the provided filter

Method Summary

Size	deepSizeOf(int maxDepth, boolean abortWhenMaxDepthExceeded, Object... obj) Measures the size in memory (heap) of the objects passed in, walking their graph down Any overlap of the graphs being passed in will be recognized and only measured once
abstract long	sizeOf(Object obj) Calculates the size in memory (heap) of the instance passed in, not navigating the down graph

Methods inherited from class java.lang.Object

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

Constructor Detail

SizeOf

public SizeOf(SizeOfFilter fieldFilter,
              boolean caching)

Builds a new SizeOf that will filter fields according to the provided filter

Parameters:

fieldFilter - The filter to apply

caching - whether to cache reflected fields

See Also:

SizeOfFilter

Method Detail

sizeOf

public abstract long sizeOf(Object obj)

Calculates the size in memory (heap) of the instance passed in, not navigating the down graph

Parameters:

obj - the object to measure the size of

Returns:

the object size in memory in bytes

deepSizeOf

public Size deepSizeOf(int maxDepth,
                       boolean abortWhenMaxDepthExceeded,
                       Object... obj)

Measures the size in memory (heap) of the objects passed in, walking their graph down Any overlap of the graphs being passed in will be recognized and only measured once

Parameters:

maxDepth - maximum depth of the object graph to traverse

abortWhenMaxDepthExceeded - true if the object traversal should be aborted when the max depth is exceeded

obj - the root objects of the graphs to measure

Returns:

the total size in bytes for these objects

See Also:

sizeOf(Object)