The Application Server has the following web application response caching capabilities:
Caching is configurable based on the servlet name or the URI.
When caching is based on the URI, this includes user specified parameters in the query string. For example, a response from /garden/catalog?category=roses is different from a response from /garden/catalog?category=lilies. These responses are stored under different keys in the cache.
Cache size, entry timeout, and other caching behaviors are configurable.
Entry timeout is measured from the time an entry is created or refreshed. To override this timeout for an individual cache mapping, specify the cache-mapping subelement timeout.
To determine caching criteria programmatically, write a class that implements the com.sun.appserv.web.cache.CacheHelper interface. For example, if only a servlet knows when a back end data source was last modified, you can write a helper class to retrieve the last modified timestamp from the data source and decide whether to cache the response based on that timestamp.
To determine cache key generation programmatically, write a class that implements the com.sun.appserv.web.cache.CacheKeyGenerator interface. See The CacheKeyGenerator Interface.
All non-ASCII request parameter values specified in cache key elements must be URL encoded. The caching subsystem attempts to match the raw parameter values in the request query string.
Since newly updated classes impact what gets cached, the web container clears the cache during dynamic deployment or reloading of classes.
com.sun.appserv.web.cachedServletName, the cached servlet target
com.sun.appserv.web.cachedURLPattern, the URL pattern being cached
Results produced by resources that are the target of a RequestDispatcher.include() or RequestDispatcher.forward() call are cached if caching has been enabled for those resources. For details, see cache-mapping in Sun Java System Application Server 9.1 Application Deployment Guide and dispatcher in Sun Java System Application Server 9.1 Application Deployment Guide. These are elements in the sun-web.xml file.