jmplib.agent

Class UpdaterAgent

java.lang.Object

jmplib.agent.UpdaterAgent

public class UpdaterAgent
extends java.lang.Object

UpdateAgent is used to initiate the instrumentation of the application code. This class is referenced to act as Java Agent on premain and agentmain. Through this class, the code of the updated classes is updated to reference the new functionalities.

Author:

Ignacio Lagartos

Field Summary

Fields

Modifier and Type	Field and Description
static java.util.Map<java.lang.Integer,java.lang.String>	instrumentables The classes that are instrumentable

Constructor Summary

Constructors

Constructor and Description
UpdaterAgent()

Method Summary

Modifier and Type	Method and Description
static void	agentmain(java.lang.String agentArgs, java.lang.instrument.Instrumentation inst)
static void	premain(java.lang.String agentArgs, java.lang.instrument.Instrumentation inst) This method is call before main method, when the agent is pointed to the JVM
static void	run(java.lang.String sourceMethodName, java.lang.String agentArgs, java.lang.instrument.Instrumentation inst) The function of this method is initialize the transformers that will process the classes to update them.
static void	updateClass(java.lang.Class<?>... clazz) This method dispatches the class received to the instrumentor in order to re-transform it in run time.

Methods inherited from class java.lang.Object

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

Field Detail

instrumentables

public static java.util.Map<java.lang.Integer,java.lang.String> instrumentables

The classes that are instrumentable

Constructor Detail

UpdaterAgent

public UpdaterAgent()

Method Detail

premain

public static void premain(java.lang.String agentArgs,
                           java.lang.instrument.Instrumentation inst)

This method is call before main method, when the agent is pointed to the JVM

agentmain

public static void agentmain(java.lang.String agentArgs,
                             java.lang.instrument.Instrumentation inst)

run

public static void run(java.lang.String sourceMethodName,
                       java.lang.String agentArgs,
                       java.lang.instrument.Instrumentation inst)
                throws StructuralIntercessionException

The function of this method is initialize the transformers that will process the classes to update them. This transformers are added to the instrumentation object.

Parameters:

sourceMethodName - Unused in this version

agentArgs - Unused in this version

inst - Instrumentation data

Throws:

StructuralIntercessionException - If a problem occurs initializing the Agent

updateClass

public static void updateClass(java.lang.Class<?>... clazz)

This method dispatches the class received to the instrumentor in order to re-transform it in run time.

Parameters:

clazz - The classes to re-transform