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org.apache.cocoon.portal.coplet.adapter.impl
Class CachingURICopletAdapter

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.cocoon.portal.coplet.adapter.impl.AbstractCopletAdapter
          org.apache.cocoon.portal.coplet.adapter.impl.URICopletAdapter
              org.apache.cocoon.portal.coplet.adapter.impl.CachingURICopletAdapter

All Implemented Interfaces:

Disposable, Initializable, Component, Contextualizable, LogEnabled, Parameterizable, Serviceable, ThreadSafe, CopletAdapter, Receiver

Direct Known Subclasses:

ApplicationCopletAdapter

public class CachingURICopletAdapter
extends URICopletAdapter
implements Parameterizable

This adapter extends the URICopletAdapter by a caching mechanism. The result of the called uri/pipeline is cached until a CopletInstanceEvent for that coplet instance is received. The content can eiter be cached in the user session or globally. The default is the user session.

Version:

$Id: CachingURICopletAdapter.html 1304258 2012-03-23 10:09:27Z ilgrosso $

Author:

Gerald Kahrer, Carsten Ziegeler

Field Summary

protected Cache	cache The cache to use for global caching.
static String	CACHE The temporary attribute name for the storing the cached coplet content.
static String	CONFIGURATION_CACHE_GLOBAL The configuration name for using the global cache.
static String	CONFIGURATION_CACHE_GLOBAL_USE_ATTRIBUTES The configuration name for querying instance attributes to generate the key for the global cache.
static String	CONFIGURATION_ENABLE_CACHING The configuration name for enabling/disabling the cache.
static String	CONFIGURATION_IGNORE_SIZING_EVENTS The configuration name for ignoring sizing events to clear the cache.
static String	DO_NOT_CACHE This temporary attribute can be set on the instance to not cache the current response.
protected Boolean	enableCaching Is caching enabled?
static String	PARAMETER_DISABLE_CACHING Deprecated. Use coplet base data configuration.

Fields inherited from class org.apache.cocoon.portal.coplet.adapter.impl.URICopletAdapter

context, resolver

Fields inherited from class org.apache.cocoon.portal.coplet.adapter.impl.AbstractCopletAdapter

manager

Fields inherited from interface org.apache.cocoon.portal.coplet.adapter.CopletAdapter

ROLE

Constructor Summary

CachingURICopletAdapter()

Method Summary

void	dispose()
protected String	getCacheKey(CopletInstanceData coplet, String uri) Build the key for the global cache.
void	handleCopletInstanceEvent(CopletInstanceEvent event) This adapter listens for CopletInstanceEvents.
void	inform(CopletInstanceEvent e, PortalService service)
protected boolean	isSizingEvent(CopletInstanceEvent event) Tests if the event is a sizing event for the coplet.
void	parameterize(Parameters parameters)
void	service(ServiceManager manager)
void	streamContent(CopletInstanceData coplet, ContentHandler contentHandler) Implement this and not toSAX()
void	streamContent(CopletInstanceData coplet, String uri, ContentHandler contentHandler)

Methods inherited from class org.apache.cocoon.portal.coplet.adapter.impl.URICopletAdapter

contextualize, initialize, renderErrorContent

Methods inherited from class org.apache.cocoon.portal.coplet.adapter.impl.AbstractCopletAdapter

destroy, getConfiguration, getConfiguration, init, login, logout, toSAX

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 Detail

CONFIGURATION_ENABLE_CACHING

public static final String CONFIGURATION_ENABLE_CACHING

The configuration name for enabling/disabling the cache.

See Also:

Constant Field Values

CONFIGURATION_CACHE_GLOBAL

public static final String CONFIGURATION_CACHE_GLOBAL

The configuration name for using the global cache.

See Also:

Constant Field Values

CONFIGURATION_CACHE_GLOBAL_USE_ATTRIBUTES

public static final String CONFIGURATION_CACHE_GLOBAL_USE_ATTRIBUTES

The configuration name for querying instance attributes to generate the key for the global cache.

See Also:

Constant Field Values

CONFIGURATION_IGNORE_SIZING_EVENTS

public static final String CONFIGURATION_IGNORE_SIZING_EVENTS

The configuration name for ignoring sizing events to clear the cache.

See Also:

Constant Field Values

CACHE

public static final String CACHE

The temporary attribute name for the storing the cached coplet content.

See Also:

Constant Field Values

DO_NOT_CACHE

public static final String DO_NOT_CACHE

This temporary attribute can be set on the instance to not cache the current response.

See Also:

Constant Field Values

PARAMETER_DISABLE_CACHING

public static final String PARAMETER_DISABLE_CACHING

Deprecated. Use coplet base data configuration.

Caching can be basically disabled with this boolean parameter.

See Also:

Constant Field Values

enableCaching

protected Boolean enableCaching

Is caching enabled?

cache

protected Cache cache

The cache to use for global caching.

Constructor Detail

CachingURICopletAdapter

public CachingURICopletAdapter()

Method Detail

parameterize

public void parameterize(Parameters parameters)

Specified by:

parameterize in interface Parameterizable

See Also:

Parameterizable.parameterize(org.apache.avalon.framework.parameters.Parameters)

service

public void service(ServiceManager manager)
             throws ServiceException

Specified by:

service in interface Serviceable

Overrides:

service in class URICopletAdapter

Throws:

ServiceException

See Also:

Serviceable.service(org.apache.avalon.framework.service.ServiceManager)

dispose

public void dispose()

Specified by:

dispose in interface Disposable

Overrides:

dispose in class URICopletAdapter

See Also:

Disposable.dispose()

streamContent

public void streamContent(CopletInstanceData coplet,
                          ContentHandler contentHandler)
                   throws SAXException

Description copied from class: AbstractCopletAdapter

Implement this and not toSAX()

Overrides:

streamContent in class URICopletAdapter

Throws:

SAXException

See Also:

AbstractCopletAdapter.streamContent(org.apache.cocoon.portal.coplet.CopletInstanceData, org.xml.sax.ContentHandler)

streamContent

public void streamContent(CopletInstanceData coplet,
                          String uri,
                          ContentHandler contentHandler)
                   throws SAXException

Overrides:

streamContent in class URICopletAdapter

Throws:

SAXException

See Also:

URICopletAdapter.streamContent(org.apache.cocoon.portal.coplet.CopletInstanceData, java.lang.String, org.xml.sax.ContentHandler)

inform

public void inform(CopletInstanceEvent e,
                   PortalService service)

Overrides:

inform in class URICopletAdapter

See Also:

Receiver

handleCopletInstanceEvent

public void handleCopletInstanceEvent(CopletInstanceEvent event)

This adapter listens for CopletInstanceEvents. Each event sets the cache invalid, except for global caching using attributes, as all attributes are part of the cache key.

isSizingEvent

protected boolean isSizingEvent(CopletInstanceEvent event)

Tests if the event is a sizing event for the coplet.

getCacheKey

protected String getCacheKey(CopletInstanceData coplet,
                             String uri)

Build the key for the global cache.