org.springframework.instrument.classloading

Interface LoadTimeWeaver

All Known Implementing Classes:

DefaultContextLoadTimeWeaver, GlassFishLoadTimeWeaver, InstrumentationLoadTimeWeaver, JBossLoadTimeWeaver, OC4JLoadTimeWeaver, ReflectiveLoadTimeWeaver, SimpleLoadTimeWeaver, WebLogicLoadTimeWeaver, WebSphereLoadTimeWeaver

public interface LoadTimeWeaver

Defines the contract for adding one or more ClassFileTransformers to a ClassLoader.

Implementations may operate on the current context ClassLoader or expose their own instrumentable ClassLoader.

Since:

2.0

Author:

Rod Johnson, Costin Leau

See Also:

ClassFileTransformer

Method Summary

Methods

Modifier and Type	Method and Description
void	addTransformer(ClassFileTransformer transformer) Add a ClassFileTransformer to be applied by this LoadTimeWeaver.
ClassLoader	getInstrumentableClassLoader() Return a ClassLoader that supports instrumentation through AspectJ-style load-time weaving based on user-defined ClassFileTransformers.
ClassLoader	getThrowawayClassLoader() Return a throwaway ClassLoader, enabling classes to be loaded and inspected without affecting the parent ClassLoader.

Method Detail

addTransformer

void addTransformer(ClassFileTransformer transformer)

Add a ClassFileTransformer to be applied by this LoadTimeWeaver.

Parameters:

transformer - the ClassFileTransformer to add

getInstrumentableClassLoader

ClassLoader getInstrumentableClassLoader()

Return a ClassLoader that supports instrumentation through AspectJ-style load-time weaving based on user-defined ClassFileTransformers.

May be the current ClassLoader, or a ClassLoader created by this LoadTimeWeaver instance.

Returns:

the ClassLoader which will expose instrumented classes according to the registered transformers

getThrowawayClassLoader

ClassLoader getThrowawayClassLoader()

Return a throwaway ClassLoader, enabling classes to be loaded and inspected without affecting the parent ClassLoader.

Should not return the same instance of the ClassLoader returned from an invocation of getInstrumentableClassLoader().

Returns:

a temporary throwaway ClassLoader; should return a new instance for each call, with no existing state