Represents implementations of URLConnection caches. An instance of
such a class can be registered with the system by doing
ResponseCache.setDefault(ResponseCache), and the system will call
this object in order to:
- store resource data which has been retrieved from an
external source into the cache
- try to fetch a requested resource that may have been
stored in the cache
The ResponseCache implementation decides which resources
should be cached, and for how long they should be cached. If a
request resource cannot be retrieved from the cache, then the
protocol handlers will fetch the resource from its original
location.
The settings for URLConnection#useCaches controls whether the
protocol is allowed to use a cached response.
For more information on HTTP caching, see
RFC 2616: Hypertext
Transfer Protocol -- HTTP/1.1
Since: 1.5