private void handleRequest(final CacheRequest request) {
if (request.url == null) {
request.notifyFailure(
RequestFailureType.MALFORMED_URL,
new NullPointerException("URL was null"),
null,
"URL was null");
return;
}
switch (request.downloadType) {
case NEVER:
{
final LinkedList<CacheEntry> result =
dbManager.select(request.url, request.user.username, request.requestSession);
if (result.size() == 0) {
request.notifyFailure(
RequestFailureType.CACHE_MISS,
null,
null,
"Could not find this data in the cache");
} else {
final CacheEntry entry = mostRecentFromList(result);
handleCacheEntryFound(entry, request);
}
break;
}
case IF_NECESSARY:
{
final LinkedList<CacheEntry> result =
dbManager.select(request.url, request.user.username, request.requestSession);
if (result.size() == 0) {
queueDownload(request);
} else {
final CacheEntry entry = mostRecentFromList(result);
handleCacheEntryFound(entry, request);
}
break;
}
case FORCE:
queueDownload(request);
break;
}
}
private void queueDownload(final CacheRequest request) {
request.notifyDownloadNecessary();
downloadQueue.add(request, CacheManager.this);
}