类 ReflectiveLoadTimeWeaver
- java.lang.Object
- org.springframework.instrument.classloading.ReflectiveLoadTimeWeaver
- 所有已实现的接口:
LoadTimeWeaver
public class ReflectiveLoadTimeWeaver extends Object implements LoadTimeWeaver
LoadTimeWeaver
which uses reflection to delegate to an underlying ClassLoader with well-known transformation hooks. The underlying ClassLoader is expected to support the following weaving methods (as defined in theLoadTimeWeaver
interface):public void addTransformer(java.lang.instrument.ClassFileTransformer)
: for registering the given ClassFileTransformer on this ClassLoaderpublic ClassLoader getThrowawayClassLoader()
: for obtaining a throwaway class loader for this ClassLoader (optional; ReflectiveLoadTimeWeaver will fall back to a SimpleThrowawayClassLoader if that method isn't available)
Please note that the above methods must reside in a class that is publicly accessible, although the class itself does not have to be visible to the application's class loader.
The reflective nature of this LoadTimeWeaver is particularly useful when the underlying ClassLoader implementation is loaded in a different class loader itself (such as the application server's class loader which is not visible to the web application). There is no direct API dependency between this LoadTimeWeaver adapter and the underlying ClassLoader, just a 'loose' method contract.
This is the LoadTimeWeaver to use in combination with Spring's
TomcatInstrumentableClassLoader
for Tomcat 5.0+ as well as with the Resin application server version 3.1+.- 从以下版本开始:
- 2.0
- 作者:
- Costin Leau, Juergen Hoeller
- 另请参阅:
addTransformer(java.lang.instrument.ClassFileTransformer)
,getThrowawayClassLoader()
,SimpleThrowawayClassLoader
,TomcatInstrumentableClassLoader
构造器概要
构造器 构造器 说明 ReflectiveLoadTimeWeaver()
Create a new ReflectiveLoadTimeWeaver for the current context class loader, which needs to support the required weaving methods.ReflectiveLoadTimeWeaver(ClassLoader classLoader)
Create a new SimpleLoadTimeWeaver for the given class loader.
方法概要
所有方法 实例方法 具体方法 修饰符和类型 方法 说明 void
addTransformer(ClassFileTransformer transformer)
Add aClassFileTransformer
to be applied by thisLoadTimeWeaver
.ClassLoader
getInstrumentableClassLoader()
Return aClassLoader
that supports instrumentation through AspectJ-style load-time weaving based on user-definedClassFileTransformers
.ClassLoader
getThrowawayClassLoader()
Return a throwawayClassLoader
, enabling classes to be loaded and inspected without affecting the parentClassLoader
.
构造器详细资料
ReflectiveLoadTimeWeaver
public ReflectiveLoadTimeWeaver()
Create a new ReflectiveLoadTimeWeaver for the current context class loader, which needs to support the required weaving methods.
ReflectiveLoadTimeWeaver
public ReflectiveLoadTimeWeaver(ClassLoader classLoader)
Create a new SimpleLoadTimeWeaver for the given class loader.- 参数:
classLoader
- theClassLoader
to delegate to for weaving (must support the required weaving methods).- 抛出:
IllegalStateException
- if the suppliedClassLoader
does not support the required weaving methods
方法详细资料
addTransformer
public void addTransformer(ClassFileTransformer transformer)
从接口复制的说明:LoadTimeWeaver
Add aClassFileTransformer
to be applied by thisLoadTimeWeaver
.- 指定者:
addTransformer
在接口中LoadTimeWeaver
- 参数:
transformer
- theClassFileTransformer
to add
getInstrumentableClassLoader
public ClassLoader getInstrumentableClassLoader()
从接口复制的说明:LoadTimeWeaver
Return aClassLoader
that supports instrumentation through AspectJ-style load-time weaving based on user-definedClassFileTransformers
.May be the current
ClassLoader
, or aClassLoader
created by thisLoadTimeWeaver
instance.- 指定者:
getInstrumentableClassLoader
在接口中LoadTimeWeaver
- 返回:
- the
ClassLoader
which will expose instrumented classes according to the registered transformers
getThrowawayClassLoader
public ClassLoader getThrowawayClassLoader()
从接口复制的说明:LoadTimeWeaver
Return a throwawayClassLoader
, enabling classes to be loaded and inspected without affecting the parentClassLoader
.Should not return the same instance of the
ClassLoader
returned from an invocation ofLoadTimeWeaver.getInstrumentableClassLoader()
.- 指定者:
getThrowawayClassLoader
在接口中LoadTimeWeaver
- 返回:
- a temporary throwaway
ClassLoader
; should return a new instance for each call, with no existing state