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## org.springframework.instrument.classloading
Class InstrumentationLoadTimeWeaver

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

All Implemented Interfaces:
  LoadTimeWeaver

    public class InstrumentationLoadTimeWeaver

extends Object
implements LoadTimeWeaver

Load time weaver relying on Instrumentation. Start with java agent, with JVM options like: `-javaagent:path/to/spring-agent.jar` where `spring-agent.jar` is a JAR file containing the InstrumentationSavingAgent class.

In Eclipse, for example, set the Run configuration's JVM args to be of the form: `-javaagent:${project_loc}/lib/spring-agent.jar`

Since:
  2.0
Author:
  Rod Johnson
See Also:
  `InstrumentationSavingAgent`

Constructor Summary
`InstrumentationLoadTimeWeaver()`

Method Summary
`void` | `addTransformer(ClassFileTransformer transformer)` Add a class file transformer to be applied by this load-time weaver.
`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.

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

Constructor Detail

### InstrumentationLoadTimeWeaver

    public InstrumentationLoadTimeWeaver()

Method Detail

### addTransformer

    public void addTransformer(ClassFileTransformer transformer)

  Description copied from interface: `LoadTimeWeaver`
  Add a class file transformer to be applied by this load-time weaver.

  Specified by:
    `addTransformer` in interface `LoadTimeWeaver`
  Parameters:
    `transformer` - the class file transformer 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:
    a class loader that supports instrumentation through AspectJ-style load-time weaving based on user-defined `ClassFileTransformers`

### getThrowawayClassLoader

    public ClassLoader getThrowawayClassLoader()

  This implementation always returns a SimpleThrowawayClassLoader.

  Specified by:
    `getThrowawayClassLoader` in interface `LoadTimeWeaver`
  Returns:
    a temporary throwaway class loader; should return a new instance for each call, with no existing state
  See Also:
    `SimpleThrowawayClassLoader`

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