After a servlet is invoked and completes generating the output
to cache, a cache entry is created containing the output and the side effects
of the servlet. These side effects can include calls to other servlets or
JavaServer Pages (JSP) files or metadata about the entry, including timeout
and entry priority information.
Unique entries are distinguished by an ID string that is generated from
the HttpServletRequest object each time the servlet runs. You can then base
servlet caching on:
- Request parameters and attributes of the Universal Resource Identifier
(URI) that was used to invoke the servlet
- Session information
- Other options, including cookies
Because JavaServer Pages files are compiled into servlets, the dynamic
cache function treats JavaServer Pages files the same as servlets, except
in specifically documented situations.
To enable servlet caching see Configuring servlet caching. To configure cache policies for your servlets, see Configuring cacheable objects with the cachespec.xml file.