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 Objects.IObjectSizeOfStrategy at Objects.setObjectSizeOfStrategy(IObjectSizeOfStrategy). Note that this is a static registration.

Author:

eelcohillenius

Constructor Summary

ObjectSizeOfAgent()

Method Summary

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