net.grinder.util.weave.j2se6
Class DCRWeaver

java.lang.Object
  net.grinder.util.weave.j2se6.DCRWeaver

All Implemented Interfaces:

Weaver

public final class DCRWeaver
extends Object
implements Weaver

Weaver that uses Java 6 dynamic class retransformation.

Author:

Philip Aston

Nested Class Summary

static interface

DCRWeaver.ClassFileTransformerFactory Factory that generates ClassFileTransformers which perform the weaving.

Nested classes/interfaces inherited from interface net.grinder.util.weave.Weaver

Weaver.TargetSource

Constructor Summary

DCRWeaver(DCRWeaver.ClassFileTransformerFactory transformerFactory, Instrumentation instrumentation)
Constructor.

Method Summary

void	applyChanges() Apply pending weaving that has been requested with Weaver.weave(java.lang.reflect.Constructor).
String	weave(Constructor<?> constructor) Queue the given constructor for weaving, and return a unique identifier that can be used by the advice to refer to the constructor pointcut.
String	weave(Method method, Weaver.TargetSource targetSource) Queue the given method for weaving, and return a unique identifier that can be used by the advice to refer to the method pointcut.

Methods inherited from class java.lang.Object

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

Constructor Detail

DCRWeaver

public DCRWeaver(DCRWeaver.ClassFileTransformerFactory transformerFactory,
                 Instrumentation instrumentation)

Constructor.

Parameters:

transformerFactory - Used to create the transformer.

instrumentation - Access to the JVM instrumentation.

Method Detail

weave

public String weave(Constructor<?> constructor)

Queue the given constructor for weaving, and return a unique identifier that can be used by the advice to refer to the constructor pointcut.

Once Weaver.weave(java.lang.reflect.Constructor) has been called for a constructor, subsequent calls are no-ops that will return the identifier generated for the original call.

The instrumentation will not be applied to the code until Weaver.applyChanges() is called.

Specified by:

weave in interface Weaver

Parameters:

constructor - The constructor.

Returns:

String that uniquely identifies the pointcut.

weave

public String weave(Method method,
                    Weaver.TargetSource targetSource)
             throws WeavingException

Queue the given method for weaving, and return a unique identifier that can be used by the advice to refer to the method pointcut.

Once Weaver.weave(java.lang.reflect.Constructor) has been called for a method, subsequent calls are no-ops that will return the identifier generated for the original call.

The instrumentation will not be applied to the code until Weaver.applyChanges() is called.

Specified by:

weave in interface Weaver

Parameters:

method - The method.

targetSource - Which object should be passed as the target to the advice.

Returns:

String that uniquely identifies the pointcut.

Throws:

WeavingException - If the targetSource is incompatible with the method.

applyChanges

public void applyChanges()
                  throws WeavingException

Apply pending weaving that has been requested with Weaver.weave(java.lang.reflect.Constructor).

Specified by:

applyChanges in interface Weaver

Throws:

WeavingException - A problem occurred with the weaving.