net.sf.ehcache.pool.impl
Class DefaultSizeOfEngine

java.lang.Object
  net.sf.ehcache.pool.impl.DefaultSizeOfEngine

All Implemented Interfaces:

SizeOfEngine

public class DefaultSizeOfEngine
extends Object
implements SizeOfEngine

Author:

Alex Snaps

Field Summary

static String

USER_FILTER_RESOURCE System property defining a user specific resource based size-of filter.

Constructor Summary

DefaultSizeOfEngine(int maxDepth, boolean abortWhenMaxDepthExceeded)
Creates a default size of engine using the best available sizing algorithm.

Method Summary

SizeOfEngine	copyWith(int maxDepth, boolean abortWhenMaxDepthExceeded) Make a copy of the SizeOf engine, preserving all of its internal state but overriding the specified parameters
Size	sizeOf(Object key, Object value, Object container) Size an element

Methods inherited from class java.lang.Object

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

Field Detail

USER_FILTER_RESOURCE

public static final String USER_FILTER_RESOURCE

System property defining a user specific resource based size-of filter.

The resource pointed to by this property must be a list of fully qualified field or class names, one per line:

 # This is a comment
 org.mycompany.domain.MyType
 org.mycompany.domain.MyOtherType.myField
 

Fields or types matching against lines in this resource will be ignored when calculating the size of the object graph.

See Also:

Constant Field Values

Constructor Detail

DefaultSizeOfEngine

public DefaultSizeOfEngine(int maxDepth,
                           boolean abortWhenMaxDepthExceeded)

Creates a default size of engine using the best available sizing algorithm.

Parameters:

maxDepth - the max object graph that will be traversed.

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

Method Detail

copyWith

public SizeOfEngine copyWith(int maxDepth,
                             boolean abortWhenMaxDepthExceeded)

Make a copy of the SizeOf engine, preserving all of its internal state but overriding the specified parameters

Specified by:

copyWith in interface SizeOfEngine

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

Returns:

a copy of the SizeOf engine using the specified parameters

sizeOf

public Size sizeOf(Object key,
                   Object value,
                   Object container)

Size an element

Specified by:

sizeOf in interface SizeOfEngine

Parameters:

key - the key of the element

value - the value of the element

container - the container of the element, ie: element object + eventual overhead

Returns:

the size of the element in bytes