Represents channels for storing resources in the ResponseCache.

  Represents channels for storing resources in the
ResponseCache. Instances of such a class provide an
OutputStream object which is called by protocol handlers to
store the resource data into the cache, and also an abort() method
which allows a cache store operation to be interrupted and
abandoned. If an IOException is encountered while reading the
response or writing to the cache, the current cache store operation
will be aborted.