/**
* Update the entry with the new information from the response. Should only be used for 304
* responses.
*
* @param requestId
* @param entry The cache Entry to be updated
* @param requestDate When the request was performed
* @param responseDate When the response was gotten
* @param response The HttpResponse from the backend server call
* @return HttpCacheEntry an updated version of the cache entry
* @throws java.io.IOException if something bad happens while trying to read the body from the
* original entry
*/
public HttpCacheEntry updateCacheEntry(
String requestId,
HttpCacheEntry entry,
Date requestDate,
Date responseDate,
HttpResponse response)
throws IOException {
if (response.getStatusLine().getStatusCode() != HttpStatus.SC_NOT_MODIFIED)
throw new IllegalArgumentException("Response must have 304 status code");
Header[] mergedHeaders = mergeHeaders(entry, response);
Resource resource = resourceFactory.copy(requestId, entry.getResource());
return new HttpCacheEntry(
requestDate, responseDate, entry.getStatusLine(), mergedHeaders, resource);
}
