/// <summary>
/// Create a subscriptionId that is unique per grainId, grainType, namespace combination.
/// </summary>
/// <param name="grainIdTypeCode"></param>
/// <param name="streamId"></param>
/// <returns></returns>
private Guid MakeSubscriptionGuid(int grainIdTypeCode, StreamId streamId)
{
// next 2 shorts ing guid are from namespace hash
uint namespaceHash = JenkinsHash.ComputeHash(streamId.Namespace);
byte[] namespaceHashByes = BitConverter.GetBytes(namespaceHash);
short s1 = BitConverter.ToInt16(namespaceHashByes, 0);
short s2 = BitConverter.ToInt16(namespaceHashByes, 2);
// Tailing 8 bytes of the guid are from the hash of the streamId Guid and a hash of the provider name.
// get streamId guid hash code
uint streamIdGuidHash = JenkinsHash.ComputeHash(streamId.Guid.ToByteArray());
// get provider name hash code
uint providerHash = JenkinsHash.ComputeHash(streamId.ProviderName);
// build guid tailing 8 bytes from grainIdHash and the hash of the provider name.
var tail = new List <byte>();
tail.AddRange(BitConverter.GetBytes(streamIdGuidHash));
tail.AddRange(BitConverter.GetBytes(providerHash));
// make guid.
// - First int is grain type
// - Two shorts from namespace hash
// - 8 byte tail from streamId Guid and provider name hash.
return(SubscriptionMarker.MarkAsImplictSubscriptionId(new Guid(grainIdTypeCode, s1, s2, tail.ToArray())));
}
/// <summary>
/// Create a subscriptionId that is unique per grainId, grainType, namespace combination.
/// </summary>
private Guid MakeSubscriptionGuid(GrainType grainType, InternalStreamId streamId)
{
// next 2 shorts inc guid are from namespace hash
uint namespaceHash = JenkinsHash.ComputeHash(streamId.GetNamespace());
byte[] namespaceHashByes = BitConverter.GetBytes(namespaceHash);
short s1 = BitConverter.ToInt16(namespaceHashByes, 0);
short s2 = BitConverter.ToInt16(namespaceHashByes, 2);
// Tailing 8 bytes of the guid are from the hash of the streamId Guid and a hash of the provider name.
// get streamId guid hash code
uint streamIdGuidHash = JenkinsHash.ComputeHash(streamId.StreamId.Key.Span);
// get provider name hash code
uint providerHash = JenkinsHash.ComputeHash(streamId.ProviderName);
// build guid tailing 8 bytes from grainIdHash and the hash of the provider name.
var tail = new List <byte>();
tail.AddRange(BitConverter.GetBytes(streamIdGuidHash));
tail.AddRange(BitConverter.GetBytes(providerHash));
// make guid.
// - First int is grain type
// - Two shorts from namespace hash
// - 8 byte tail from streamId Guid and provider name hash.
var id = new Guid((int)JenkinsHash.ComputeHash(grainType.ToString()), s1, s2, tail.ToArray());
var result = SubscriptionMarker.MarkAsImplictSubscriptionId(id);
return(result);
}