org.apache.cocoon.samples
Class EventAwareGenerator

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.cocoon.xml.AbstractXMLProducer
          org.apache.cocoon.generation.AbstractGenerator
              org.apache.cocoon.generation.ServiceableGenerator
                  org.apache.cocoon.template.JXTemplateGenerator
                      org.apache.cocoon.samples.EventAwareGenerator

All Implemented Interfaces:

Poolable, Recyclable, Disposable, Component, LogEnabled, Serviceable, CacheableProcessingComponent, Generator, SitemapModelComponent, XMLProducer

public class EventAwareGenerator
extends JXTemplateGenerator

This is a sample generator to demonstrate the event aware caching. We simply extend the JXTG.

Version:

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

Field Summary

Fields inherited from class org.apache.cocoon.template.JXTemplateGenerator

CACHE_KEY, NS, VALIDITY

Fields inherited from class org.apache.cocoon.generation.ServiceableGenerator

manager

Fields inherited from class org.apache.cocoon.generation.AbstractGenerator

objectModel, parameters, resolver, source

Fields inherited from class org.apache.cocoon.xml.AbstractXMLProducer

contentHandler, EMPTY_CONTENT_HANDLER, lexicalHandler, xmlConsumer

Fields inherited from interface org.apache.cocoon.generation.Generator

ROLE

Constructor Summary

EventAwareGenerator()

Method Summary

void	generate() Generate the XML and stream it into the pipeline
Serializable	getKey() Generate the unique key for the cache.
SourceValidity	getValidity() Generate the validity object, tells the cache how long to keep contents having this key around.

Methods inherited from class org.apache.cocoon.template.JXTemplateGenerator

dispose, getConsumer, performGeneration, recycle, service, setup

Methods inherited from class org.apache.cocoon.xml.AbstractXMLProducer

setConsumer, setContentHandler, setLexicalHandler

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

Methods inherited from interface org.apache.cocoon.xml.XMLProducer

setConsumer

Constructor Detail

EventAwareGenerator

public EventAwareGenerator()

Method Detail

getKey

public Serializable getKey()

Generate the unique key for the cache. This key must be unique inside the space of this XSP page, it is used to find the page contents in the cache (if getValidity says that the contents are still valid). This method will be invoked before the getValidity() method.

Specified by:

getKey in interface CacheableProcessingComponent

Overrides:

getKey in class JXTemplateGenerator

Returns:

The generated key or null if the component is currently not cacheable.

See Also:

CacheableProcessingComponent.getKey()

getValidity

public SourceValidity getValidity()

Generate the validity object, tells the cache how long to keep contents having this key around. In this case, it will be until an Event is retrieved matching the NamedEvent created below. Before this method can be invoked the getKey() method will be invoked.

Specified by:

getValidity in interface CacheableProcessingComponent

Overrides:

getValidity in class JXTemplateGenerator

Returns:

The generated validity object or null if the component is currently not cacheable.

See Also:

CacheableProcessingComponent.getValidity()

generate

public void generate()
              throws IOException,
                     SAXException,
                     ProcessingException

Description copied from interface: Generator

Generate the XML and stream it into the pipeline

Specified by:

generate in interface Generator

Overrides:

generate in class JXTemplateGenerator

Throws:

IOException

SAXException

ProcessingException

See Also:

Generator.generate()