ix.util.context
Class ContextLockingProxy.Handler

java.lang.Object
  ix.util.context.ContextLockingProxy.Handler

All Implemented Interfaces:

java.lang.reflect.InvocationHandler

Enclosing class:

ContextLockingProxy

public static class ContextLockingProxy.Handler
extends java.lang.Object
implements java.lang.reflect.InvocationHandler

The invocation-handler for a context-locking proxy. When the handler is created, it grabs the current context which is assumed to be the right context for the first method call handled by the proxy. That's saved as the "instance context". Then, whenever the handler is given a method to call, it does the following while synchronized on the current ContextHolder:

1. Remember the current context.
2. Set the current context to the saved instance context.
3. Invoke the method, and then in a "finally" clause:
4. Record as the instance context whatever context is current now that the method's returned, and
5. restore the context remembered earlier.

Field Summary

protected java.lang.Object	instance
protected Context	instanceContext

Constructor Summary

ContextLockingProxy.Handler(java.lang.Object instance)

Method Summary

java.lang.Object

invoke(java.lang.Object proxy, java.lang.reflect.Method method, java.lang.Object[] args)

Methods inherited from class java.lang.Object

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

Field Detail

instance

protected java.lang.Object instance

instanceContext

protected Context instanceContext

Constructor Detail

ContextLockingProxy.Handler

public ContextLockingProxy.Handler(java.lang.Object instance)

Method Detail

invoke

public java.lang.Object invoke(java.lang.Object proxy,
                               java.lang.reflect.Method method,
                               java.lang.Object[] args)
                        throws java.lang.Throwable

Specified by:

invoke in interface java.lang.reflect.InvocationHandler

Throws:

java.lang.Throwable