public async Task <Possible <CasHash, Failure> > AddToCasAsync(Stream filestream, CasHash?hash, UrgencyHint urgencyHint, Guid activityId)
{
using (var eventing = new AddToCasStreamActivity(CompositingCache.EventSource, activityId, this))
{
eventing.Start(filestream, urgencyHint);
var result = await m_casSession.AddToCasAsync(filestream, hash, urgencyHint, eventing.Id);
if (result.Succeeded)
{
PinnedToCas.TryAdd(result.Result, 0);
}
return(eventing.Returns(result));
}
}
public async Task <Possible <FullCacheRecordWithDeterminism, Failure> > AddOrGetAsync(WeakFingerprintHash weak, CasHash casElement, Hash hashElement, CasEntries hashes, UrgencyHint urgencyHint, Guid activityId)
{
using (var eventing = new AddOrGetActivity(CompositingCache.EventSource, activityId, this))
{
eventing.Start(weak, casElement, hashElement, hashes, urgencyHint);
// First, check if all the content has been pinned.
if (Cache.StrictMetadataCasCoupling)
{
List <CasHash> referencedHashes = new List <CasHash>(hashes);
referencedHashes.Add(casElement);
foreach (CasHash oneHash in referencedHashes)
{
if (!PinnedToCas.ContainsKey(oneHash))
{
return(eventing.StopFailure(new UnpinnedCasEntryFailure(Cache.CacheId, oneHash)));
}
}
}
// Then check the determinism bit...
var testStrongFingerprint = new StrongFingerprint(weak, casElement, hashElement, Cache.CacheId);
var existRecordCheck = await m_metadataSession.GetCacheEntryAsync(testStrongFingerprint, urgencyHint, eventing.Id);
if (existRecordCheck.Succeeded)
{
// There's an existing record, so we need the rules for determinism upgrade / downgrade. Which are complicated by the existance
// (or lack there of) of the associated content.
// First we'll check for determinism upgrades or other situations that don't require content probes.
var existingRecord = existRecordCheck.Result;
// If the determinsim is going from no determinism to some determinism OR the record is going from a non-tool
// determinism to a tool determinism, replace
if ((existingRecord.Determinism.IsNone && hashes.Determinism.IsDeterministic) ||
(hashes.Determinism.IsDeterministicTool && !existingRecord.Determinism.IsDeterministicTool))
{
return(eventing.Returns(await m_metadataSession.AddOrGetAsync(weak, casElement, hashElement, hashes, urgencyHint, eventing.Id)));
}
// Before trying to probe for files, see if the entries are identical.
// If so, tell the caller we stored their record.
if (hashes == existingRecord && hashes.Determinism.EffectiveGuid == existingRecord.Determinism.EffectiveGuid)
{
return(eventing.Returns(new FullCacheRecordWithDeterminism(CacheDeterminism.None)));
}
// The rest of the determinism moves depend on if the files exist or not.
bool foundAllFiles = true;
var pinCheck = await m_casSession.PinToCasAsync(existRecordCheck.Result, urgencyHint, eventing.Id);
foreach (var oneOutput in pinCheck)
{
if (!oneOutput.Succeeded)
{
foundAllFiles = false;
}
}
// Ok, so now with the knowledge of file existance, if we're missing files, allow the call through no matter what.
if (!foundAllFiles)
{
return(eventing.Returns(await m_metadataSession.AddOrGetAsync(weak, casElement, hashElement, hashes, urgencyHint, eventing.Id)));
}
// If the existing entry is more deterministic than what we're being given or
// the records are the same level, unless tool deterministic or single phase.
if ((existingRecord.Determinism.IsDeterministic && !hashes.Determinism.IsDeterministic) ||
(existingRecord.Determinism.IsDeterministicTool && !hashes.Determinism.IsDeterministicTool) ||
(existingRecord.Determinism.EffectiveGuid == hashes.Determinism.EffectiveGuid && !existingRecord.Determinism.IsDeterministicTool && !existingRecord.Determinism.IsSinglePhaseNonDeterministic))
{
// If the records are identical except for determinsim, return null.
if (existingRecord == hashes)
{
return(eventing.Returns(new FullCacheRecordWithDeterminism(CacheDeterminism.None)));
}
return(eventing.Returns(new FullCacheRecordWithDeterminism(new FullCacheRecord(testStrongFingerprint, existingRecord))));
}
// And now the error conditions.
// If a tool determinism collection, or an attempt to go from deterministic to not deterministic.
if (existingRecord.Determinism.IsDeterministicTool && hashes.Determinism.IsDeterministicTool)
{
return(eventing.StopFailure(new NotDeterministicFailure(Cache.CacheId, new FullCacheRecord(testStrongFingerprint, existingRecord), new FullCacheRecord(testStrongFingerprint, hashes))));
}
}
return(eventing.Returns(await m_metadataSession.AddOrGetAsync(weak, casElement, hashElement, hashes, urgencyHint, eventing.Id)));
}
}
