Package org.apache.wiki.providers

Class CachingAttachmentProvider

java.lang.Object

org.apache.wiki.providers.CachingAttachmentProvider

All Implemented Interfaces:

AttachmentProvider, WikiProvider

public class CachingAttachmentProvider
extends Object
implements AttachmentProvider

Provides a caching attachment provider. This class rests on top of a real provider class and provides a cache to speed things up. Only the Attachment objects are cached; the actual attachment contents are fetched always from the provider.

Since:

2.1.64.

Field Summary

Fields inherited from interface org.apache.wiki.api.providers.AttachmentProvider

PROP_STORAGEDIR

Fields inherited from interface org.apache.wiki.api.providers.WikiProvider

LATEST_VERSION

Constructor Summary

Constructors

Constructor	Description
CachingAttachmentProvider()

Method Summary

Modifier and Type	Method	Description
void	deleteAttachment(Attachment att)
void	deleteVersion(Attachment att)
Collection<Attachment>	findAttachments(QueryItem[] query)
InputStream	getAttachmentData(Attachment att)
Attachment	getAttachmentInfo(Page page, String name, int version)
String	getProviderInfo()	Gets the provider class name, and cache statistics (misscount and hitcount of the attachment cache).
AttachmentProvider	getRealProvider()	Returns the WikiAttachmentProvider that this caching provider delegates to.
List<Attachment>	getVersionHistory(Attachment att)
void	initialize(Engine engine, Properties properties)
List<Attachment>	listAllChanged(Date timestamp)
List<Attachment>	listAttachments(Page page)
void	moveAttachmentsForPage(String oldParent, String newParent)
void	putAttachmentData(Attachment att, InputStream data)

Methods inherited from class java.lang.Object

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

Constructor Details

CachingAttachmentProvider

public CachingAttachmentProvider()

Method Details

initialize

public void initialize(Engine engine,
 Properties properties)
                throws NoRequiredPropertyException,
IOException

Specified by:

initialize in interface WikiProvider

Throws:

NoRequiredPropertyException

IOException

putAttachmentData

public void putAttachmentData(Attachment att,
 InputStream data)
                       throws ProviderException,
IOException

Specified by:

putAttachmentData in interface AttachmentProvider

Throws:

ProviderException

IOException

getAttachmentData

public InputStream getAttachmentData(Attachment att)
                              throws ProviderException,
IOException

Specified by:

getAttachmentData in interface AttachmentProvider

Throws:

ProviderException

IOException

listAttachments

public List<Attachment> listAttachments(Page page)
                                 throws ProviderException

Specified by:

listAttachments in interface AttachmentProvider

Throws:

ProviderException

findAttachments

public Collection<Attachment> findAttachments(QueryItem[] query)

Specified by:

findAttachments in interface AttachmentProvider

listAllChanged

public List<Attachment> listAllChanged(Date timestamp)
                                throws ProviderException

Specified by:

listAllChanged in interface AttachmentProvider

Throws:

ProviderException

getAttachmentInfo

public Attachment getAttachmentInfo(Page page,
 String name,
 int version)
                             throws ProviderException

Specified by:

getAttachmentInfo in interface AttachmentProvider

Throws:

ProviderException

getVersionHistory

public List<Attachment> getVersionHistory(Attachment att)

Specified by:

getVersionHistory in interface AttachmentProvider

deleteVersion

public void deleteVersion(Attachment att)
                   throws ProviderException

Specified by:

deleteVersion in interface AttachmentProvider

Throws:

ProviderException

deleteAttachment

public void deleteAttachment(Attachment att)
                      throws ProviderException

Specified by:

deleteAttachment in interface AttachmentProvider

Throws:

ProviderException

getProviderInfo

public String getProviderInfo()

Gets the provider class name, and cache statistics (misscount and hitcount of the attachment cache).

Specified by:

getProviderInfo in interface WikiProvider

Returns:

A plain string with all the above-mentioned values.

getRealProvider

public AttachmentProvider getRealProvider()

Returns the WikiAttachmentProvider that this caching provider delegates to.

Returns:

The real provider underneath this one.

moveAttachmentsForPage

public void moveAttachmentsForPage(String oldParent,
 String newParent)
                            throws ProviderException

Specified by:

moveAttachmentsForPage in interface AttachmentProvider

Throws:

ProviderException