com.sun.syndication.fetcher.impl
Class HashMapFeedInfoCache

java.lang.Object
  com.sun.syndication.fetcher.impl.HashMapFeedInfoCache

All Implemented Interfaces:

FeedFetcherCache, Serializable

public class HashMapFeedInfoCache

extends Object

implements FeedFetcherCache, Serializable

A very simple implementation of the FeedFetcherCache interface.

This implementation uses a HashMap to cache retrieved feeds. This implementation is most suitible for sort term (client aggregator?) use, as the memory usage will increase over time as the number of feeds in the cache increases.

Author:

Nick Lothian

See Also:

Serialized Form

Field Summary

(package private) static HashMapFeedInfoCache	_instance
private Map	infoCache
static long	serialVersionUID

Constructor Summary

HashMapFeedInfoCache()
Constructor for HashMapFeedInfoCache Only use this if you want multiple instances of the cache.

Method Summary

protected Object	get(Object key)
SyndFeedInfo	getFeedInfo(URL feedUrl) Get a SyndFeedInfo object from the cache.
protected Map	getInfoCache()
static FeedFetcherCache	getInstance() Get the global instance of the cache
protected void	put(Object key, Object value)
void	setFeedInfo(URL feedUrl, SyndFeedInfo syndFeedInfo) Add a SyndFeedInfo object to the cache
protected void	setInfoCache(Map map)

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

_instance

static HashMapFeedInfoCache _instance

infoCache

private Map infoCache

Constructor Detail

HashMapFeedInfoCache

public HashMapFeedInfoCache()

Constructor for HashMapFeedInfoCache

Only use this if you want multiple instances of the cache. Usually getInstance() is more appropriate.

Method Detail

getInstance

public static FeedFetcherCache getInstance()

Get the global instance of the cache

Returns:

an implementation of FeedFetcherCache

get

protected Object get(Object key)

getFeedInfo

public SyndFeedInfo getFeedInfo(URL feedUrl)

Description copied from interface: FeedFetcherCache

Get a SyndFeedInfo object from the cache.

Specified by:

getFeedInfo in interface FeedFetcherCache

Parameters:

feedUrl - The url of the feed

Returns:

A SyndFeedInfo or null if it is not in the cache

See Also:

FeedFetcherCache.getFeedInfo(java.net.URL)

put

protected void put(Object key,
                   Object value)

setFeedInfo

public void setFeedInfo(URL feedUrl,
                        SyndFeedInfo syndFeedInfo)

Description copied from interface: FeedFetcherCache

Add a SyndFeedInfo object to the cache

Specified by:

setFeedInfo in interface FeedFetcherCache

Parameters:

feedUrl - The url of the feed

syndFeedInfo - A SyndFeedInfo for the feed

See Also:

FeedFetcherCache.setFeedInfo(java.net.URL, com.sun.syndication.fetcher.impl.SyndFeedInfo)

getInfoCache

protected Map getInfoCache()

setInfoCache

protected void setInfoCache(Map map)