java.lang.Object
- org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver

All Implemented Interfaces:
LoadTimeWeaver
```
public class InstrumentationLoadTimeWeaver
extends Object
implements LoadTimeWeaver
```
LoadTimeWeaver relying on VM Instrumentation.
Start the JVM specifying the Java agent to be used — for example, as follows where spring-instrument-{version}.jar is a JAR file containing the InstrumentationSavingAgent class shipped with Spring and where {version} is the release version of the Spring Framework (e.g., 5.1.5.RELEASE).
-javaagent:path/to/spring-instrument-{version}.jar
In Eclipse, for example, add something similar to the following to the JVM arguments for the Eclipse "Run configuration":
-javaagent:${project_loc}/lib/spring-instrument-{version}.jar
Since:
2.0
Author:
Rod Johnson, Juergen Hoeller
See Also:
InstrumentationSavingAgent

Constructor Summary

Constructors
Constructor	Description
`InstrumentationLoadTimeWeaver()`	Create a new InstrumentationLoadTimeWeaver for the default ClassLoader.
`InstrumentationLoadTimeWeaver(ClassLoader classLoader)`	Create a new InstrumentationLoadTimeWeaver for the given ClassLoader.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addTransformer(ClassFileTransformer transformer)`	Add a `ClassFileTransformer` to be applied by this `LoadTimeWeaver`.
`ClassLoader`	`getInstrumentableClassLoader()`	We have the ability to weave the current class loader when starting the JVM in this way, so the instrumentable class loader will always be the current loader.
`ClassLoader`	`getThrowawayClassLoader()`	This implementation always returns a `SimpleThrowawayClassLoader`.
`static boolean`	`isInstrumentationAvailable()`	Check whether an Instrumentation instance is available for the current VM.
`void`	`removeTransformers()`	Remove all registered transformers, in inverse order of registration.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - InstrumentationLoadTimeWeaver
```
public InstrumentationLoadTimeWeaver()
```
    Create a new InstrumentationLoadTimeWeaver for the default ClassLoader.
  - InstrumentationLoadTimeWeaver
```
public InstrumentationLoadTimeWeaver(@Nullable
                                     ClassLoader classLoader)
```
    Create a new InstrumentationLoadTimeWeaver for the given ClassLoader.
    Parameters:
    classLoader - the ClassLoader that registered transformers are supposed to apply to
- Method Detail
  - 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()
```
    We have the ability to weave the current class loader when starting the JVM in this way, so the instrumentable class loader will always be the current loader.
    Specified by:
    getInstrumentableClassLoader in interface LoadTimeWeaver
    Returns:
    the ClassLoader which will expose instrumented classes according to the registered transformers
  - getThrowawayClassLoader
```
public ClassLoader getThrowawayClassLoader()
```
    This implementation always returns a SimpleThrowawayClassLoader.
    Specified by:
    getThrowawayClassLoader in interface LoadTimeWeaver
    Returns:
    a temporary throwaway ClassLoader; should return a new instance for each call, with no existing state
  - removeTransformers
```
public void removeTransformers()
```
    Remove all registered transformers, in inverse order of registration.
  - isInstrumentationAvailable
```
public static boolean isInstrumentationAvailable()
```
    Check whether an Instrumentation instance is available for the current VM.
    See Also:
    getInstrumentation()

Class InstrumentationLoadTimeWeaver

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

InstrumentationLoadTimeWeaver

InstrumentationLoadTimeWeaver

Method Detail

addTransformer

getInstrumentableClassLoader

getThrowawayClassLoader

removeTransformers

isInstrumentationAvailable