net.spy.net
Class URLWatcher

java.lang.Object
  net.spy.SpyObject
      net.spy.net.URLWatcher

public class URLWatcher
extends SpyObject

URLWatcher watches URLs and provides access to the most recent data from the URL.

Constructor Summary

protected

URLWatcher() Get an instance of URLWatcher.

Method Summary

String	getContent(URL u) Get the content (as a String) for a given URL.
static URLWatcher	getInstance() Get the static instance of URLWatcher.
protected URLItem	getNewURLItem(URL u)
boolean	isWatching(URL u) Find out if this URLWatcher is watching a given URL.
static void	setInstance(URLWatcher uw) Set an instance (for testing).
void	shutdown() Instruct the URLWatcher to stop URLWatching.
void	startWatching(URLItem u) Start watching the given URL.
String	toString() String me.

Methods inherited from class net.spy.SpyObject

getLogger

Methods inherited from class java.lang.Object

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

Constructor Detail

URLWatcher

protected URLWatcher()

Get an instance of URLWatcher.

Method Detail

getInstance

public static URLWatcher getInstance()

Get the static instance of URLWatcher.

Returns:

the URLWatcher

setInstance

public static void setInstance(URLWatcher uw)

Set an instance (for testing).

toString

public String toString()

String me.

Overrides:

toString in class Object

isWatching

public boolean isWatching(URL u)

Find out if this URLWatcher is watching a given URL.

Parameters:

u - the URL to test

Returns:

true if the URL is already being watched

startWatching

public void startWatching(URLItem u)

Start watching the given URL.

Parameters:

u - The item to watch

Throws:

TimeoutException

ExecutionException

InterruptedException

shutdown

public void shutdown()

Instruct the URLWatcher to stop URLWatching.

getNewURLItem

protected URLItem getNewURLItem(URL u)

getContent

public String getContent(URL u)
                  throws IOException

Get the content (as a String) for a given URL.

Parameters:

u - The URL whose content we want

Returns:

The String contents, or null if none could be retreived

Throws:

IOException - if there was a problem updating the URL