Package info.ejava.examples.svc.aop.items.dynamicproxies

Class MyInvocationHandler

java.lang.Object

info.ejava.examples.svc.aop.items.dynamicproxies.MyInvocationHandler

All Implemented Interfaces:

InvocationHandler

public class MyInvocationHandler
extends Object
implements InvocationHandler

This is an example Dynamic Proxy. The Proxy class implements the supplied interfaces and delegates calls to the invoke() method within this class.

Field Summary

Fields

Modifier and Type	Field	Description
private final Object	target

Constructor Summary

Constructors

Constructor	Description
MyInvocationHandler()

Method Summary

Modifier and Type	Method	Description
Object	invoke(Object proxy, Method method, Object[] args)	This method will get called for each method call to the proxy.
static Object	newInstance(Object target)	A convenience method to build a Dynamic Proxy for the interfaces of a target object of an unknown type.

Methods inherited from class java.lang.Object

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

Field Details

target

private final Object target

Constructor Details

MyInvocationHandler

public MyInvocationHandler()

Method Details

newInstance

public static Object newInstance(Object target)

A convenience method to build a Dynamic Proxy for the interfaces of a target object of an unknown type.

Parameters:

target - object to proxy

Returns:

the proxy wrapping the target

invoke

public Object invoke(Object proxy,
 Method method,
 Object[] args)
              throws Throwable

This method will get called for each method call to the proxy. The method will simply log when called, invoke the target method, and log when complete. A real handler might do things like check security accesses, begin/terminate a database transaction, etc.

Specified by:

invoke in interface InvocationHandler

Throws:

Throwable