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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 the JVM specifying the java agent to be used, like so:

`-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 `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`.

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 `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`

### 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

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