/// <inheritdoc />
public IEnumerable <Task <Possible <PublishedEntryRef, Failure> > > ListPublishedEntriesByWeakFingerprint(WeakContentFingerprint weak)
{
WeakFingerprintHash cacheCoreWeakFingerprint = new WeakFingerprintHash(new Hash(weak.Hash));
// TODO: We assume that everything up until the first sentinel is local. This is fine for a simple 'vertical' aggregator
// of a local and remote cache, but isn't general.
PublishedEntryRefLocality currentLocality = PublishedEntryRefLocality.Local;
foreach (Task <Possible <StrongFingerprint, Failure> > entryPromise in m_cache.EnumerateStrongFingerprints(cacheCoreWeakFingerprint))
{
if (entryPromise.IsCompleted && entryPromise.Result.Succeeded && entryPromise.Result.Result is StrongFingerprintSentinel)
{
currentLocality = PublishedEntryRefLocality.Remote;
continue;
}
yield return(AdaptPublishedEntry(entryPromise, currentLocality));
}
}
private static async Task <Possible <PublishedEntryRef, Failure> > AdaptPublishedEntry(Task <Possible <StrongFingerprint, Failure> > cacheCoreEntryPromise, PublishedEntryRefLocality locality)
{
Possible <StrongFingerprint, Failure> maybeFingerprint = await cacheCoreEntryPromise;
if (maybeFingerprint.Succeeded)
{
StrongFingerprint fingerprint = maybeFingerprint.Result;
if (fingerprint is StrongFingerprintSentinel)
{
return(PublishedEntryRef.Ignore);
}
return(new PublishedEntryRef(
pathSetHash: ContentHashingUtilities.CreateFrom(fingerprint.CasElement.ToArray()),
strongFingerprint: new StrongContentFingerprint(FingerprintUtilities.CreateFrom(fingerprint.HashElement.ToArray())),
oringinatingCache: fingerprint.CacheId,
locality: locality));
}
return(maybeFingerprint.Failure);
}