Package org.springframework.instrument.classloading.tomcat

Class TomcatLoadTimeWeaver

java.lang.Object

org.springframework.instrument.classloading.tomcat.TomcatLoadTimeWeaver

All Implemented Interfaces:

LoadTimeWeaver

public class TomcatLoadTimeWeaver
extends Object
implements LoadTimeWeaver

LoadTimeWeaver implementation for Tomcat's new org.apache.tomcat.InstrumentableClassLoader. Also capable of handling Spring's TomcatInstrumentableClassLoader when encountered.

Since:

4.0

Author:

Juergen Hoeller

Constructor Summary

Constructors

Constructor	Description
TomcatLoadTimeWeaver()	Create a new instance of the TomcatLoadTimeWeaver class using the default class loader.
TomcatLoadTimeWeaver(ClassLoader classLoader)	Create a new instance of the TomcatLoadTimeWeaver class using the supplied ClassLoader.

Method Summary

Modifier and Type	Method	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.

Methods inherited from class java.lang.Object

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

Constructor Details

TomcatLoadTimeWeaver

public TomcatLoadTimeWeaver()

Create a new instance of the TomcatLoadTimeWeaver class using the default class loader.

See Also:

• ClassUtils.getDefaultClassLoader()

TomcatLoadTimeWeaver

public TomcatLoadTimeWeaver(@Nullable
 ClassLoader classLoader)

Create a new instance of the TomcatLoadTimeWeaver class using the supplied ClassLoader.

Parameters:

classLoader - the ClassLoader to delegate to for weaving

Method Details

addTransformer

public void addTransformer(ClassFileTransformer transformer)

Description copied from interface: LoadTimeWeaver

Add a ClassFileTransformer to be applied by this LoadTimeWeaver.

Specified by:

addTransformer in interface LoadTimeWeaver

Parameters:

transformer - the ClassFileTransformer to add

getInstrumentableClassLoader

public ClassLoader getInstrumentableClassLoader()

Description copied from interface: LoadTimeWeaver

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.

Specified by:

getInstrumentableClassLoader in interface LoadTimeWeaver

Returns:

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

getThrowawayClassLoader

public ClassLoader getThrowawayClassLoader()

Description copied from interface: LoadTimeWeaver

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 LoadTimeWeaver.getInstrumentableClassLoader().

Specified by:

getThrowawayClassLoader in interface LoadTimeWeaver

Returns:

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