feat(batch16): port outbound and parser-facing client core features
This commit is contained in:
Joseph Doherty
@@ -122,8 +122,8 @@ public sealed partial class ClientConnection
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internal bool Headers; // mirrors c.headers
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// Limits (int32 allows atomic access).
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private int _mpay; // mirrors c.mpay — max payload (signed, jwt.NoLimit = -1)
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private int _msubs; // mirrors c.msubs — max subscriptions
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private int _mpay = -1; // mirrors c.mpay — max payload (signed, jwt.NoLimit = -1)
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private int _msubs = -1; // mirrors c.msubs — max subscriptions
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private int _mcl; // mirrors c.mcl — max control line
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// Subscriptions.
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@@ -136,6 +136,9 @@ public sealed partial class ClientConnection
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internal long OutPb; // pending bytes
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internal long OutMp; // max pending snapshot
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internal TimeSpan OutWdl; // write deadline snapshot
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internal WriteTimeoutPolicy OutWtp = WriteTimeoutPolicy.Close;
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internal List<OutboundChunk> OutNb = [];
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internal List<OutboundChunk> OutWnb = [];
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// Timing.
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internal DateTime Start;
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@@ -1474,6 +1477,206 @@ public sealed partial class ClientConnection
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internal static ClosedState ClosedStateForErr(Exception err) =>
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err is EndOfStreamException ? ClosedState.ClientClosed : ClosedState.ReadError;
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internal (List<OutboundChunk> chunks, long attempted) CollapsePtoNB()
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{
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long attempted = 0;
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foreach (var chunk in OutNb)
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attempted += chunk.Count;
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return (OutNb, attempted);
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}
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internal bool FlushOutbound()
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{
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if (Flags.IsSet(ClientFlags.FlushOutbound))
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return false;
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Flags = Flags.Set(ClientFlags.FlushOutbound);
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try
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{
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if (_nc is null || Server is null || OutPb == 0)
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return true;
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var (collapsed, attempted) = CollapsePtoNB();
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OutNb = [];
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if (collapsed.Count > 0)
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OutWnb.AddRange(collapsed);
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long written = 0;
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try
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{
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foreach (var chunk in OutWnb)
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{
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_nc.Write(chunk.Buffer, 0, chunk.Count);
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written += chunk.Count;
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}
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_nc.Flush();
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}
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catch (IOException ioEx) when (ioEx.InnerException is SocketException se &&
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(se.SocketErrorCode == SocketError.TimedOut ||
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se.SocketErrorCode == SocketError.WouldBlock))
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{
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if (HandleWriteTimeout(written, attempted, OutWnb.Count))
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return true;
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}
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catch (Exception ex)
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{
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Debugf("Error flushing: {0}", ex.Message);
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MarkConnAsClosed(ClosedState.WriteError);
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return true;
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}
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if (written > 0)
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{
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OutPb = Math.Max(0, OutPb - written);
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if (OutPb == 0)
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OutWnb.Clear();
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}
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return true;
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}
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finally
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{
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Flags = Flags.Clear(ClientFlags.FlushOutbound);
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}
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}
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internal bool HandleWriteTimeout(long written, long attempted, int numChunks)
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{
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if (Flags.IsSet(ClientFlags.ExpectConnect) && !Flags.IsSet(ClientFlags.ConnectReceived))
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{
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MarkConnAsClosed(ClosedState.SlowConsumerWriteDeadline);
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return true;
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}
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if (OutWtp == WriteTimeoutPolicy.Close || written == 0)
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{
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MarkConnAsClosed(ClosedState.SlowConsumerWriteDeadline);
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return true;
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}
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Flags = Flags.Set(ClientFlags.IsSlowConsumer);
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Noticef("Slow Consumer State: WriteDeadline exceeded with {0} chunks of {1} bytes.", numChunks, attempted);
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return false;
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}
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internal void MarkConnAsClosed(ClosedState reason)
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{
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if (reason is ClosedState.ReadError or ClosedState.WriteError or ClosedState.SlowConsumerPendingBytes
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or ClosedState.SlowConsumerWriteDeadline or ClosedState.TlsHandshakeError)
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{
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Flags = Flags.Set(ClientFlags.SkipFlushOnClose);
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}
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if (Flags.IsSet(ClientFlags.ConnMarkedClosed))
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return;
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Flags = Flags.Set(ClientFlags.ConnMarkedClosed);
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CloseConnection(reason);
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}
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internal void QueueOutbound(byte[] data)
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{
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if (IsClosed())
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return;
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OutPb += data.Length;
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var remaining = data;
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while (remaining.Length > 0)
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{
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var rented = NbPool.Get(remaining.Length);
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var count = Math.Min(rented.Length, remaining.Length);
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Buffer.BlockCopy(remaining, 0, rented, 0, count);
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OutNb.Add(new OutboundChunk(rented, count));
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remaining = remaining[count..];
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}
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if (Kind == ClientKind.Client && OutMp > 0 && OutPb > OutMp)
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{
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OutPb -= data.Length;
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Noticef("Slow Consumer Detected: MaxPending of {0} exceeded", OutMp);
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MarkConnAsClosed(ClosedState.SlowConsumerPendingBytes);
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}
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}
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internal Exception? ProcessHeaderPub(byte[] arg, byte[]? remaining)
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{
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ParseCtx.Kind = Kind;
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ParseCtx.HasHeaders = Headers;
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ParseCtx.MaxPayload = _mpay == 0 ? -1 : _mpay;
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return ProtocolParser.ProcessHeaderPub(ParseCtx, arg, remaining);
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}
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internal Exception? ProcessPub(byte[] arg)
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{
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ParseCtx.Kind = Kind;
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ParseCtx.MaxPayload = _mpay == 0 ? -1 : _mpay;
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return ProtocolParser.ProcessPub(ParseCtx, arg);
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}
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internal static List<byte[]> SplitArg(byte[] arg) => ProtocolParser.SplitArgs(arg);
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internal Exception? ParseSub(byte[] arg, bool noForward)
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{
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var copied = arg.ToArray();
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var args = SplitArg(copied);
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byte[] subject;
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byte[]? queue;
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byte[] sid;
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switch (args.Count)
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{
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case 2:
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subject = args[0];
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queue = null;
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sid = args[1];
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break;
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case 3:
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subject = args[0];
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queue = args[1];
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sid = args[2];
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break;
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default:
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return new FormatException($"processSub Parse Error: {Encoding.ASCII.GetString(arg)}");
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}
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ProcessSub(subject, queue, sid, noForward);
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return null;
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}
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internal (Subscription? sub, Exception? err) ProcessSub(byte[] subject, byte[]? queue, byte[] sid, bool noForward)
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{
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return ProcessSubEx(subject, queue, sid, noForward, false, false);
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}
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internal (Subscription? sub, Exception? err) ProcessSubEx(
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byte[] subject, byte[]? queue, byte[] sid, bool noForward, bool si, bool rsi)
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{
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lock (_mu)
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{
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_in.Subs++;
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if ((IsClosed() && !ClientKindHelpers.IsInternalClient(Kind)) || Subs is null)
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return (null, new InvalidOperationException("connection closed"));
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if (SubsAtLimit())
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return (null, new InvalidOperationException("too many subs"));
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var sidText = Encoding.ASCII.GetString(sid);
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if (Subs.TryGetValue(sidText, out var existing))
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return (existing, null);
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var sub = new Subscription
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{
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Subject = subject,
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Queue = queue,
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Sid = sid,
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};
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Subs[sidText] = sub;
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return (sub, null);
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}
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}
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// features 440-441: processInfo, processErr
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internal void ProcessInfo(string info)
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{
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