Package org.apache.wicket.util.instrument

Class ObjectSizeOfAgent

java.lang.Object

org.apache.wicket.util.instrument.ObjectSizeOfAgent

public class ObjectSizeOfAgent
extends Object

Instrumentation agent for calculating object sizes using Java's instrumentation API. To use it, have the jar somewhere we you can access it (just having this class on the classpath is not enough) and startup your application with a -javaagent argument like e.g: '-javaagent:/mydir/wicket-objectsizeof-agent-1.3-SNAPSHOT.jar'. When the application starts up, this agent will register an WicketObjects.IObjectSizeOfStrategy at WicketObjects.setObjectSizeOfStrategy(IObjectSizeOfStrategy). Note that this is a static registration.

Author:

eelcohillenius

Constructor Summary

Constructors

Constructor	Description
ObjectSizeOfAgent()

Method Summary

Modifier and Type	Method	Description
static void	agentmain(String agentArgs, Instrumentation instrumentation)	Initializes agent when it is attached to an already running JVM.
static void	premain(String agentArgs, Instrumentation instrumentation)	Initializes agent before the main function of the application is executed.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectSizeOfAgent

public ObjectSizeOfAgent()

Method Detail

agentmain

public static void agentmain(String agentArgs,
                             Instrumentation instrumentation)

Initializes agent when it is attached to an already running JVM.

Parameters:

agentArgs - Arguments passed in to the agent

instrumentation - The instrumentation class

premain

public static void premain(String agentArgs,
                           Instrumentation instrumentation)

Initializes agent before the main function of the application is executed.

Parameters:

agentArgs - Arguments passed in to the agent

instrumentation - The instrumentation class