Package dk.netarkivet.viewerproxy

Class NotifyingURIResolver

java.lang.Object

java.util.Observable

dk.netarkivet.viewerproxy.NotifyingURIResolver

All Implemented Interfaces:

URIResolver, URIResolverHandler

public class NotifyingURIResolver
extends java.util.Observable
implements URIResolver, URIResolverHandler

A wrapper class for URI resolver, which also notifies an URIObserver about all URIs visited and their response codes.

Field Summary

Fields inherited from interface dk.netarkivet.viewerproxy.URIResolver

NOT_FOUND

Constructor Summary

Constructors

Constructor	Description
NotifyingURIResolver(URIResolver ur, URIObserver uo)	Initialise the wrapper.

Method Summary

Modifier and Type	Method	Description
int	lookup(Request request, Response response)	Passes the uri to the current wrapped resolver and notifies the observer of the result.
void	setURIResolver(URIResolver anUR)	Sets the current URIResolver wrapped.

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Constructor Detail

NotifyingURIResolver

public NotifyingURIResolver(URIResolver ur,
                            URIObserver uo)

Initialise the wrapper. Accepts the class to wrap and the observer to notify.

Parameters:

ur - The Wrapped URI resolver

uo - The URI Observer to notify on each url.

Throws:

ArgumentNotValid - if either argument is null.

Method Detail

setURIResolver

public void setURIResolver(URIResolver anUR)

Sets the current URIResolver wrapped.

Specified by:

setURIResolver in interface URIResolverHandler

Parameters:

anUR - URI resolver to wrap.

Throws:

ArgumentNotValid - if argument is null.

lookup

public int lookup(Request request,
                  Response response)

Passes the uri to the current wrapped resolver and notifies the observer of the result.

Specified by:

lookup in interface URIResolver

Parameters:

request - A given request

response - A given response

Returns:

the response code from the wrapped class

See Also:

URIResolver.lookup(Request, Response)