private void GossipTo(Address address)
{
var to = Replica(address);
if (_dataEntries.Count <= _settings.MaxDeltaElements)
{
var status = new Internal.Status(_dataEntries.Select(x => new KeyValuePair <string, ByteString>(x.Key, GetDigest(x.Key))).ToImmutableDictionary(), 0, 1);
to.Tell(status);
}
else
{
var totChunks = _dataEntries.Count / _settings.MaxDeltaElements;
for (var i = 1; i <= Math.Min(totChunks, 10); i++)
{
if (totChunks == _statusTotChunks)
{
_statusCount++;
}
else
{
_statusCount = ThreadLocalRandom.Current.Next(0, totChunks);
_statusTotChunks = totChunks;
}
var chunk = (int)(_statusCount % totChunks);
var entries = _dataEntries.Where(x => Math.Abs(x.Key.GetHashCode()) % totChunks == chunk)
.Select(x => new KeyValuePair <string, ByteString>(x.Key, GetDigest(x.Key)))
.ToImmutableDictionary();
var status = new Internal.Status(entries, chunk, totChunks);
to.Tell(status);
}
}
}
private Proto.Msg.Status StatusToProto(Status status)
{
var proto = new Proto.Msg.Status
{
Chunk = (uint)status.Chunk,
TotChunks = (uint)status.TotalChunks
};
foreach (var entry in status.Digests)
{
proto.Entries.Add(new Proto.Msg.Status.Types.Entry
{
Key = entry.Key,
Digest = ByteString.CopyFrom(entry.Value.ToByteArray())
});
}
if (status.ToSystemUid.HasValue)
{
proto.HasToSystemUid = true;
proto.ToSystemUid = status.ToSystemUid.Value;
}
if (status.FromSystemUid.HasValue)
{
proto.HasFromSystemUid = true;
proto.FromSystemUid = status.FromSystemUid.Value;
}
return(proto);
}
private void ReceiveStatus(IImmutableDictionary <string, ByteString> otherDigests, int chunk, int totChunks)
{
if (_log.IsDebugEnabled)
{
_log.Debug("Received gossip status from {0}, chunk {1} of {2} containing {3}", Sender.Path.Address, chunk, totChunks, string.Join(", ", otherDigests.Keys));
}
var otherDifferentKeys = otherDigests
.Where(x => IsOtherDifferent(x.Key, x.Value))
.Select(x => x.Key)
.ToArray();
var otherKeys = otherDigests.Keys.ToImmutableHashSet();
var myKeys = (totChunks == 1
? _dataEntries.Keys
: _dataEntries.Keys.Where(x => x.GetHashCode() % totChunks == chunk))
.ToImmutableHashSet();
var otherMissingKeys = myKeys.Except(otherKeys);
var keys = otherDifferentKeys
.Union(otherMissingKeys)
.Take(_settings.MaxDeltaElements)
.ToArray();
if (keys.Length != 0)
{
if (_log.IsDebugEnabled)
{
_log.Debug("Sending gossip to {0}, containing {1}", Sender.Path.Address, string.Join(", ", keys));
}
var g = new Gossip(keys.Select(k => new KeyValuePair <string, DataEnvelope>(k, GetData(k))).ToImmutableDictionary(), otherDifferentKeys.Any());
Sender.Tell(g);
}
var myMissingKeys = otherKeys.Except(myKeys);
if (!myMissingKeys.IsEmpty)
{
if (Context.System.Log.IsDebugEnabled)
{
Context.System.Log.Debug("Sending gossip status to {0}, requesting missing {1}", Sender.Path.Address, string.Join(", ", myMissingKeys));
}
var status = new Internal.Status(myMissingKeys.Select(x => new KeyValuePair <string, ByteString>(x, NotFoundDigest)).ToImmutableDictionary(), chunk, totChunks);
Sender.Tell(status);
}
}