net.sf.jiapi.interceptor

Class InvocationInterceptor

java.lang.Object

net.sf.jiapi.event.EventProducer

net.sf.jiapi.interceptor.InvocationInterceptor

public class InvocationInterceptor
extends EventProducer

InvocationInterceptor intercepts method invocations and delegates invocations to InvokeHandler.

Following code snippet is an example, how to initialize InvocationInterceptor:

 InstrumentationContext ctx = new InstrumentationContext();
 InstrumentationDescriptor id = new InstrumentationDescriptor();
 id.addInclusionRule("samples.*");
 ctx.addInstrumentationDescriptor(id);
 
 InvocationInterceptor ii = new InvocationInterceptor(id, "java*", this);
 

Author:

Mika Riekkinen

Constructor Summary

Constructors

Constructor and Description
InvocationInterceptor(InstrumentationDescriptor id, InvocationHandler handler) Constructor.
InvocationInterceptor(InstrumentationDescriptor id, String[] resolutions, InvocationHandler handler) Creates new InvocationInterceptor.
InvocationInterceptor(InstrumentationDescriptor id, String resolution, InvocationHandler handler) Creates new InvocationInterceptor.

Method Summary

Modifier and Type	Method and Description
Object	invokeMethod(Object o, String name, Object[] args, String signature) Called by Jiapi runtime.

Methods inherited from class net.sf.jiapi.event.EventProducer

getResolutions, isProtected, isProtected, match, protect, release

Methods inherited from class java.lang.Object

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

Constructor Detail

InvocationInterceptor

public InvocationInterceptor(InstrumentationDescriptor id,
                             InvocationHandler handler)

Constructor. Resolution is set to '*'.

Parameters:

id - Instrumentation decsriptor, that this InvocationInterceptor registers itself to.

handler - InvocationHandler

InvocationInterceptor

public InvocationInterceptor(InstrumentationDescriptor id,
                             String resolution,
                             InvocationHandler handler)

Creates new InvocationInterceptor. Resolution tells, which methods are to be intercepted.

Parameters:

id - Instrumentation decsriptor, that this InvocationInterceptor registers itself to.

resolution - Resolution, that is used to select which methods will be intercepted.

handler - InvocationHandler

InvocationInterceptor

public InvocationInterceptor(InstrumentationDescriptor id,
                             String[] resolutions,
                             InvocationHandler handler)

Creates new InvocationInterceptor.

Parameters:

id - Instrumentation decsriptor, that this InvocationInterceptor registers itself to.

resolutions - Resolutions, that is used further to select which methods will trigger events to be produced.

handler - InvocationHandler

Method Detail

invokeMethod

public Object invokeMethod(Object o,
                           String name,
                           Object[] args,
                           String signature)
                    throws Throwable

Called by Jiapi runtime. This method delegates invocation to InvocationHandler

Parameters:

o - if invocation is being made to an static method, this parameter holds a Class of the called method, otherwise this is the instance, that invocation should be acted on.

name - of the method to call

args - Arguments of the method

signature - signature

Returns:

Object

Throws:

Throwable - on error