Package org.ametys.plugins.syndication

Class FeedCache

java.lang.Object

org.apache.avalon.framework.logger.AbstractLogEnabled

org.ametys.plugins.syndication.FeedCache

All Implemented Interfaces:

Initializable, Component, LogEnabled

public class FeedCache
extends AbstractLogEnabled
implements Component, Initializable

Feed cache, supports preloading multiple feeds in multiple concurrent threads.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	FeedCache.FeedCacheLoader	The feed cache loader, delegates the loading to the component's loadFeed method (to be easily overridable).
protected class	FeedCache.FeedLoadWorker	Runnable loading an URL into the cache.

Field Summary

Fields

Modifier and Type	Field	Description
protected LoadingCache<String,FeedResult>	_cache	The user information cache.
static final String	ROLE	The component role.

Constructor Summary

Constructors

Constructor	Description
FeedCache()

Method Summary

Modifier and Type	Method	Description
protected CloseableHttpClient	_getHttpClient()	Build a HttpClient object
FeedResult	getFeed(String feedUrl, int lifeTime)	Get a feed.
FeedResult	getFeedNoCache(String feedUrl)	Get a feed not from the cache.
void	initialize()
protected FeedResult	loadFeed(String feedUrl)	Retrieve a feed's content to store it into the cache.
void	preload(Collection<String> feeds)	Pre-load a collection of feeds, one by thread, to avoid getting timeouts sequentially.

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

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

Field Details

ROLE

public static final String ROLE

The component role.

_cache

protected LoadingCache<String,FeedResult> _cache

The user information cache.

Constructor Details

FeedCache

public FeedCache()

Method Details

initialize

public void initialize()
                throws Exception

Specified by:

initialize in interface Initializable

Throws:

Exception

preload

public void preload(Collection<String> feeds)

Pre-load a collection of feeds, one by thread, to avoid getting timeouts sequentially.

Parameters:

feeds - the feeds to preload.

getFeedNoCache

public FeedResult getFeedNoCache(String feedUrl)
                          throws IOException

Get a feed not from the cache.

Parameters:

feedUrl - the feed.

Returns:

the feed result.

Throws:

IOException - if an error occurs while loading the feed

getFeed

public FeedResult getFeed(String feedUrl,
 int lifeTime)

Get a feed.

Parameters:

feedUrl - the feed.

lifeTime - the amount of date or time to be added to the field

Returns:

the feed response.

_getHttpClient

protected CloseableHttpClient _getHttpClient()

Build a HttpClient object

Returns:

The HttpClient object

loadFeed

protected FeedResult loadFeed(String feedUrl)
                       throws IOException

Retrieve a feed's content to store it into the cache.

Parameters:

feedUrl - the feed to load.

Returns:

the feed content.

Throws:

IOException - if an error occurs with the HttpURLConnection