com.sun.appserv.web.cache
Class DefaultCacheHelper

java.lang.Object
  com.sun.appserv.web.cache.DefaultCacheHelper

All Implemented Interfaces:

CacheHelper

public class DefaultCacheHelper

extends java.lang.Object

implements CacheHelper

DefaultCacheHelper interface is the built-in implementation of the CacheHelper interface to aide in: a) the key generation b) whether to cache the response. There is one CacheHelper instance per web application.

Field Summary

static java.lang.String	ATTR_CACHING_FILTER_NAME
static java.lang.String	PROP_KEY_GENERATOR_ATTR_NAME

Fields inherited from interface com.sun.appserv.web.cache.CacheHelper

ATTR_CACHE_MAPPED_SERVLET_NAME, ATTR_CACHE_MAPPED_URL_PATTERN, TIMEOUT_VALUE_NOT_SET

Constructor Summary

DefaultCacheHelper()

Method Summary

void	destroy() Stop this Context component.
java.lang.String	getCacheKey(HttpServletRequest request) getCacheKey: generate the key to be used to cache this request
int	getTimeout(HttpServletRequest request) get timeout for the cacheable data in this request
void	init(ServletContext context, java.util.Map props) initialize this helper
boolean	isCacheable(HttpServletRequest request) isCacheable: is the response to given request cachebale?
boolean	isRefreshNeeded(HttpServletRequest request) isRefreshNeeded: is the response to given request be refreshed?
void	setCacheManager(CacheManager manager) set the CacheManager for this application

Methods inherited from class java.lang.Object

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

Field Detail

ATTR_CACHING_FILTER_NAME

public static final java.lang.String ATTR_CACHING_FILTER_NAME

See Also:

Constant Field Values

PROP_KEY_GENERATOR_ATTR_NAME

public static final java.lang.String PROP_KEY_GENERATOR_ATTR_NAME

See Also:

Constant Field Values

Constructor Detail

DefaultCacheHelper

public DefaultCacheHelper()

Method Detail

setCacheManager

public void setCacheManager(CacheManager manager)

set the CacheManager for this application

Parameters:

manager - associated with this application

init

public void init(ServletContext context,
                 java.util.Map props)

initialize this helper

Specified by:

init in interface CacheHelper

Parameters:

context - the web application context this helper belongs to

props - helper properties

getCacheKey

public java.lang.String getCacheKey(HttpServletRequest request)

getCacheKey: generate the key to be used to cache this request

Specified by:

getCacheKey in interface CacheHelper

Parameters:

request - incoming HttpServletRequest

isCacheable

public boolean isCacheable(HttpServletRequest request)

isCacheable: is the response to given request cachebale?

Specified by:

isCacheable in interface CacheHelper

Parameters:

request - incoming HttpServletRequest object

isRefreshNeeded

public boolean isRefreshNeeded(HttpServletRequest request)

isRefreshNeeded: is the response to given request be refreshed?

Specified by:

isRefreshNeeded in interface CacheHelper

Parameters:

request - incoming HttpServletRequest object

getTimeout

public int getTimeout(HttpServletRequest request)

get timeout for the cacheable data in this request

Specified by:

getTimeout in interface CacheHelper

Parameters:

request - incoming HttpServletRequest object

destroy

public void destroy()
             throws java.lang.Exception

Stop this Context component.

Specified by:

destroy in interface CacheHelper

Throws:

java.lang.Exception - if a shutdown error occurs