Package org.jrd.agent

Class InstrumentationProvider

java.lang.Object

org.jrd.agent.InstrumentationProvider

public class InstrumentationProvider
extends Object

This class stores instrumentation and transformer objects and handles the transformation, retrieval of bytecode and class names.

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	INFO_DELIMITER
private final Instrumentation	instrumentation
private final Transformer	transformer

Constructor Summary

Constructors

Constructor	Description
InstrumentationProvider(Instrumentation inst, Transformer transformer)

Method Summary

Modifier and Type	Method	Description
int	cleanOverrides(String pattern)
private Class	findClass(String className)
byte[]	findClassBody(String className)	Finds class object corresponding to the class name and returns its bytecode.
private byte[]	getClassBody(Class clazz)
void	getClasses(BlockingQueue<String> queue, Boolean abort, boolean doGetInfo)	Inserts names of classes into queue.
void	getOverrides(BlockingQueue<String> queue)
void	setClassBody(String cname, byte[] nwBody)

Methods inherited from class java.lang.Object

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

Field Details

transformer

private final Transformer transformer

instrumentation

private final Instrumentation instrumentation

INFO_DELIMITER

private static final String INFO_DELIMITER

See Also:

• Constant Field Values

Constructor Details

InstrumentationProvider

InstrumentationProvider(Instrumentation inst,
 Transformer transformer)

Method Details

setClassBody

public void setClassBody(String cname,
 byte[] nwBody)
                  throws UnmodifiableClassException

Throws:

UnmodifiableClassException

getClassBody

private byte[] getClassBody(Class clazz)
                     throws UnmodifiableClassException

Throws:

UnmodifiableClassException

findClassBody

public byte[] findClassBody(String className)
                     throws UnmodifiableClassException

Finds class object corresponding to the class name and returns its bytecode.

Parameters:

className - name of class we want to get

Returns:

bytecode of given class

Throws:

UnmodifiableClassException - if the class can not be re-transformed

findClass

private Class findClass(String className)

getClasses

public void getClasses(BlockingQueue<String> queue,
 Boolean abort,
 boolean doGetInfo)
                throws InterruptedException

Inserts names of classes into queue. Stops execution when it receives abort signal.

Parameters:

queue - output queue

abort - abort signal

Throws:

InterruptedException - interrupted exception

getOverrides

public void getOverrides(BlockingQueue<String> queue)
                  throws InterruptedException

Throws:

InterruptedException

cleanOverrides

public int cleanOverrides(String pattern)