org.expasy.jpl.commons.base.mem
Class MemoryAgent

java.lang.Object
  org.expasy.jpl.commons.base.mem.MemoryAgent

public final class MemoryAgent
extends Object

This agent trace sizeof of running objects. Implemented and extended code from http://www.javaspecialists.eu/archive/Issue142.html

Version:

1.0.0

Author:

nikitin

Constructor Summary

MemoryAgent()

Method Summary

static long	deepSizeOf(Object obj) Returns deep size of object, recursively iterating over its fields and superclasses.
static void	flushInFile(String filename) flush output in file
static void	flushInStdout() flush output in standard output stream
static boolean	isSharedFlyweight(Object obj) Returns true if this is a well-known shared flyweight.
static void	premain(String agentArgs, Instrumentation instrumentation) Initializes agent
static void	prettyByteDisabled()
static void	prettyByteEnabled()
static long	sizeOf(Object obj) Returns object size.
static void	switchFlyweightProfilingOff()
static void	switchFlyweightProfilingOn()
static void	traceDisabled()
static void	traceEnabled() trace enabled/disabled
static void	traceSizesOf(Object o)

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryAgent

public MemoryAgent()

Method Detail

premain

public static void premain(String agentArgs,
                           Instrumentation instrumentation)

Initializes agent

flushInFile

public static void flushInFile(String filename)
                        throws FileNotFoundException

flush output in file

Throws:

FileNotFoundException

flushInStdout

public static void flushInStdout()

flush output in standard output stream

traceEnabled

public static void traceEnabled()

trace enabled/disabled

traceDisabled

public static void traceDisabled()

prettyByteEnabled

public static void prettyByteEnabled()

prettyByteDisabled

public static void prettyByteDisabled()

switchFlyweightProfilingOn

public static void switchFlyweightProfilingOn()

switchFlyweightProfilingOff

public static void switchFlyweightProfilingOff()

sizeOf

public static long sizeOf(Object obj)

Returns object size.

deepSizeOf

public static long deepSizeOf(Object obj)

Returns deep size of object, recursively iterating over its fields and superclasses.

traceSizesOf

public static void traceSizesOf(Object o)

isSharedFlyweight

public static boolean isSharedFlyweight(Object obj)

Returns true if this is a well-known shared flyweight. For example, interned Strings, Booleans and Number objects