ehcache

net.sf.ehcache.pool.sizeof
Class AgentSizeOf

java.lang.Object
  extended by net.sf.ehcache.pool.sizeof.SizeOf
      extended by net.sf.ehcache.pool.sizeof.AgentSizeOf

public class AgentSizeOf
extends SizeOf

SizeOf implementation that relies on a Java agent to be loaded to do the measurement It will try to load the agent through the JDK6 Attach API if available All it's constructor do throw UnsupportedOperationException if the agent isn't present or couldn't be loaded dynamically

Author:
Chris Dennis, Alex Snaps

Constructor Summary
AgentSizeOf()
          Builds a new SizeOf that will not filter fields and will cache reflected fields
AgentSizeOf(SizeOfFilter filter)
          Builds a new SizeOf that will filter fields according to the provided filter and will cache reflected fields
AgentSizeOf(SizeOfFilter filter, boolean caching)
          Builds a new SizeOf that will filter fields according to the provided filter
 
Method Summary
protected  long measureSizeOf(Object obj)
          Measure the size of an instance
 
Methods inherited from class net.sf.ehcache.pool.sizeof.SizeOf
deepSizeOf, sizeOf
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

AgentSizeOf

public AgentSizeOf()
            throws UnsupportedOperationException
Builds a new SizeOf that will not filter fields and will cache reflected fields

Throws:
UnsupportedOperationException - If agent couldn't be loaded or isn't present
See Also:
AgentSizeOf(net.sf.ehcache.pool.sizeof.filter.SizeOfFilter, boolean)

AgentSizeOf

public AgentSizeOf(SizeOfFilter filter)
            throws UnsupportedOperationException
Builds a new SizeOf that will filter fields according to the provided filter and will cache reflected fields

Parameters:
filter - The filter to apply
Throws:
UnsupportedOperationException - If agent couldn't be loaded or isn't present
See Also:
AgentSizeOf(net.sf.ehcache.pool.sizeof.filter.SizeOfFilter, boolean), SizeOfFilter

AgentSizeOf

public AgentSizeOf(SizeOfFilter filter,
                   boolean caching)
            throws UnsupportedOperationException
Builds a new SizeOf that will filter fields according to the provided filter

Parameters:
filter - The filter to apply
caching - whether to cache reflected fields
Throws:
UnsupportedOperationException - If agent couldn't be loaded or isn't present
See Also:
SizeOfFilter
Method Detail

measureSizeOf

protected long measureSizeOf(Object obj)
Description copied from class: SizeOf
Measure the size of an instance

Specified by:
measureSizeOf in class SizeOf
Parameters:
obj - the reference to measure
Returns:
the size occupied on heap in bytes

ehcache

true