public int StoreSnapshot(
IReadOnlyCollection <Blob> blobs,
Fuzzy scanFuzzy,
DateTime creationTimeUtc,
Func <string, Stream> openRead)
{
var newSnapshot = new Snapshot(
_currentSnapshotId == null
? 0
: _currentSnapshotId.Value + 1,
creationTimeUtc,
WriteBlobs(blobs, scanFuzzy, openRead));
using var memoryStream = new MemoryStream(
DataConvert.ObjectToBytes(newSnapshot));
var newSnapshotReference = new SnapshotReference(
_salt,
_iterations,
WriteContent(AesGcmCrypto.GenerateNonce(), memoryStream));
_intRepository.StoreValue(
newSnapshot.SnapshotId,
DataConvert.ObjectToBytes(newSnapshotReference));
_currentSnapshotId = newSnapshot.SnapshotId;
_probe.StoredSnapshot(newSnapshot.SnapshotId);
return(newSnapshot.SnapshotId);
}
private Snapshot GetSnapshot(
int snapshotId,
SnapshotReference snapshotReference)
{
try
{
using var memoryStream = new MemoryStream();
RetrieveContent(
snapshotReference.ContentUris,
memoryStream);
return(DataConvert.BytesToObject <Snapshot>(
memoryStream.ToArray()));
}
catch (ChunkyardException)
{
throw;
}
catch (Exception e)
{
throw new ChunkyardException(
$"Could not read snapshot: #{snapshotId}",
e);
}
}