Class ValidatingCachingHttpContentFactory

java.lang.Object

org.eclipse.jetty.http.content.CachingHttpContentFactory

org.eclipse.jetty.http.content.ValidatingCachingHttpContentFactory

All Implemented Interfaces:

Runnable, HttpContent.Factory

public class ValidatingCachingHttpContentFactory
extends CachingHttpContentFactory
implements Runnable

HttpContent.Factory implementation of CachingHttpContentFactory which evicts invalid entries from the cache. Uses a validationTime parameter to check files when they are accessed and/or sweepDelay parameter for a periodic sweep for invalid entries in the cache.

HttpContent validation checks are configured through the validationTime parameter in the constructor. If an HttpContent is found to be invalid it will be removed from the cache. A value of -1 means that the cached HttpContent will never be checked if it is still valid, a value of 0 means it is checked on every request, a positive value indicates the number of milliseconds of the minimum time between validation checks.

This also remember a missed entry for the time set by validationTimems. After this has elapsed the entry will be invalid and will be evicted from the cache at the next access.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	ValidatingCachingHttpContentFactory.ValidatingCachedContent
protected static class	ValidatingCachingHttpContentFactory.ValidatingNotFoundContent

Nested classes/interfaces inherited from class CachingHttpContentFactory

CachingHttpContentFactory.CachedHttpContent, CachingHttpContentFactory.CachingHttpContent, CachingHttpContentFactory.NotFoundHttpContent

Constructor Summary

Constructors

Constructor	Description
ValidatingCachingHttpContentFactory(HttpContent.Factory authority, long validationPeriod, ByteBufferPool bufferPool)	Construct a ValidatingCachingHttpContentFactory which validates entries upon use to check if they are still valid.
ValidatingCachingHttpContentFactory(HttpContent.Factory authority, long validationPeriod, ByteBufferPool bufferPool, Scheduler scheduler, long sweepPeriod, long idleTimeout)	Construct a ValidatingCachingHttpContentFactory which validates entries upon use to check if they are still valid and an optional period sweeper of the cache to find invalid and old entries to evict.

Method Summary

Modifier and Type	Method	Description
protected boolean	isCacheable(HttpContent httpContent)	Tests whether the given HttpContent is cacheable, and if there is enough room to fit it in the cache.
protected CachingHttpContentFactory.CachingHttpContent	newCachedContent(String p, HttpContent httpContent)
protected CachingHttpContentFactory.CachingHttpContent	newNotFoundContent(String p)
void	run()

Methods inherited from class CachingHttpContentFactory

flushCache, getCache, getCachedFiles, getCachedSize, getContent, getMaxCachedFiles, getMaxCachedFileSize, getMaxCacheSize, isUseDirectByteBuffers, removeFromCache, setMaxCachedFiles, setMaxCachedFileSize, setMaxCacheSize, setUseDirectByteBuffers

Methods inherited from class Object

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

Constructor Details

ValidatingCachingHttpContentFactory

public ValidatingCachingHttpContentFactory(@Name("authority")
 HttpContent.Factory authority,
 @Name("validationPeriod")
 long validationPeriod,
 @Name("bufferPool")
 ByteBufferPool bufferPool)

Construct a ValidatingCachingHttpContentFactory which validates entries upon use to check if they are still valid.

Parameters:

authority - the wrapped HttpContent.Factory to use.

validationPeriod - time between filesystem checks in ms to see if an HttpContent is still valid (-1 never validate, 0 always validate).

bufferPool - the ByteBufferPool to use.

ValidatingCachingHttpContentFactory

public ValidatingCachingHttpContentFactory(@Name("authority")
 HttpContent.Factory authority,
 @Name("validationPeriod")
 long validationPeriod,
 @Name("byteBufferPool")
 ByteBufferPool bufferPool,
 @Name("scheduler")
 Scheduler scheduler,
 @Name("sweepPeriod")
 long sweepPeriod,
 @Name("idleTimeout")
 long idleTimeout)

Construct a ValidatingCachingHttpContentFactory which validates entries upon use to check if they are still valid and an optional period sweeper of the cache to find invalid and old entries to evict.

Parameters:

authority - the wrapped HttpContent.Factory to use.

validationPeriod - time between filesystem checks in ms to see if an HttpContent is still valid (-1 never validate, 0 always validate).

bufferPool - the ByteBufferPool to use.

scheduler - scheduler to use for the sweeper, can be null to not use sweeper.

sweepPeriod - time between runs of the sweeper in ms (if 0 never sweep for invalid entries).

idleTimeout - amount of time in ms an entry can be unused before evicted by the sweeper (if 0 never evict unused entries).

Method Details

isCacheable

protected boolean isCacheable(HttpContent httpContent)

Description copied from class: CachingHttpContentFactory

Tests whether the given HttpContent is cacheable, and if there is enough room to fit it in the cache.

Overrides:

isCacheable in class CachingHttpContentFactory

Parameters:

httpContent - the HttpContent to test.

Returns:

whether the HttpContent is cacheable.

run

public void run()

Specified by:

run in interface Runnable

newCachedContent

protected CachingHttpContentFactory.CachingHttpContent newCachedContent(String p,
 HttpContent httpContent)

Overrides:

newCachedContent in class CachingHttpContentFactory

newNotFoundContent

protected CachingHttpContentFactory.CachingHttpContent newNotFoundContent(String p)

Overrides:

newNotFoundContent in class CachingHttpContentFactory