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feat(ipc): negotiate worker frame max, add gRPC headroom, bound DrainEvents (IPC-02/03/04 gateway half)

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Proto foundation + gateway-side of the size/backpressure pass:

- IPC-02: add GatewayHello.max_frame_bytes (regen Generated/); gateway sends
  its negotiated worker-frame max in the handshake so the worker can adopt it
  instead of a hard-coded default. Worker read-half lands separately.
- IPC-03: give the pipe frame max envelope-overhead headroom above the public
  gRPC cap (WorkerFrameProtocolOptions.EnvelopeOverheadReserveBytes = 64 KiB;
  default Worker.MaxMessageBytes bumped to 16 MiB + reserve), cross-validate the
  headroom at startup, and pre-check command envelope size in WorkerClient so an
  oversized command fails only that correlation (ResourceExhausted) instead of
  faulting the whole session.
- IPC-04: reject DrainEvents max_events above a public ceiling in the request
  validator (worker per-reply cap lands with the worker half).

Docs: GatewayConfiguration, WorkerFrameProtocol, gateway.md.
Tests: headroom validation, DrainEvents bound, oversized-command per-command
failure (pipe-harness, verified on windev).
This commit is contained in:
Joseph Doherty
2026-07-09 08:49:59 -04:00
parent e1a505d662
commit c8b3a2281a
16 changed files with 362 additions and 65 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/ZB.MOM.WW.MxGateway.Contracts/Generated/MxaccessWorker.cs
+97 -52
View File
@@ -44,63 +44,64 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
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descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
new pbr::FileDescriptor[] { global::Google.Protobuf.WellKnownTypes.DurationReflection.Descriptor, global::Google.Protobuf.WellKnownTypes.TimestampReflection.Descriptor, global::ZB.MOM.WW.MxGateway.Contracts.Proto.MxaccessGatewayReflection.Descriptor, },
new pbr::GeneratedClrTypeInfo(new[] {typeof(global::ZB.MOM.WW.MxGateway.Contracts.Proto.WorkerState), typeof(global::ZB.MOM.WW.MxGateway.Contracts.Proto.WorkerFaultCategory), }, null, new pbr::GeneratedClrTypeInfo[] {
new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.MxGateway.Contracts.Proto.WorkerEnvelope), global::ZB.MOM.WW.MxGateway.Contracts.Proto.WorkerEnvelope.Parser, new[]{ "ProtocolVersion", "SessionId", "Sequence", "CorrelationId", "GatewayHello", "WorkerHello", "WorkerReady", "WorkerCommand", "WorkerCommandReply", "WorkerCancel", "WorkerShutdown", "WorkerShutdownAck", "WorkerEvent", "WorkerHeartbeat", "WorkerFault" }, new[]{ "Body" }, null, null, null),
new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.MxGateway.Contracts.Proto.GatewayHello), global::ZB.MOM.WW.MxGateway.Contracts.Proto.GatewayHello.Parser, new[]{ "SupportedProtocolVersion", "Nonce", "GatewayVersion" }, null, null, null, null),
new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.MxGateway.Contracts.Proto.GatewayHello), global::ZB.MOM.WW.MxGateway.Contracts.Proto.GatewayHello.Parser, new[]{ "SupportedProtocolVersion", "Nonce", "GatewayVersion", "MaxFrameBytes" }, null, null, null, null),
new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.MxGateway.Contracts.Proto.WorkerHello), global::ZB.MOM.WW.MxGateway.Contracts.Proto.WorkerHello.Parser, new[]{ "ProtocolVersion", "Nonce", "WorkerProcessId", "WorkerVersion" }, null, null, null, null),
new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.MxGateway.Contracts.Proto.WorkerReady), global::ZB.MOM.WW.MxGateway.Contracts.Proto.WorkerReady.Parser, new[]{ "WorkerProcessId", "MxaccessProgid", "MxaccessClsid", "ReadyTimestamp" }, null, null, null, null),
new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.MxGateway.Contracts.Proto.WorkerCommand), global::ZB.MOM.WW.MxGateway.Contracts.Proto.WorkerCommand.Parser, new[]{ "Command", "EnqueueTimestamp" }, null, null, null, null),
@@ -1108,6 +1109,7 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
supportedProtocolVersion_ = other.supportedProtocolVersion_;
nonce_ = other.nonce_;
gatewayVersion_ = other.gatewayVersion_;
maxFrameBytes_ = other.maxFrameBytes_;
_unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
}
@@ -1153,6 +1155,25 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
}
}
/// <summary>Field number for the "max_frame_bytes" field.</summary>
public const int MaxFrameBytesFieldNumber = 4;
private uint maxFrameBytes_;
/// <summary>
/// Maximum worker-frame payload size, in bytes, negotiated by the gateway from its
/// configured pipe limit. The worker adopts this as its frame-protocol MaxMessageBytes
/// instead of a hard-coded default; 0 (an older gateway that never set the field) means
/// "use the worker's built-in default". Sits above the public gRPC cap by an
/// envelope-overhead margin so an accepted gRPC payload always fits one worker frame.
/// </summary>
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
[global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
public uint MaxFrameBytes {
get { return maxFrameBytes_; }
set {
maxFrameBytes_ = value;
}
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
[global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
public override bool Equals(object other) {
@@ -1171,6 +1192,7 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
if (SupportedProtocolVersion != other.SupportedProtocolVersion) return false;
if (Nonce != other.Nonce) return false;
if (GatewayVersion != other.GatewayVersion) return false;
if (MaxFrameBytes != other.MaxFrameBytes) return false;
return Equals(_unknownFields, other._unknownFields);
}
@@ -1181,6 +1203,7 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
if (SupportedProtocolVersion != 0) hash ^= SupportedProtocolVersion.GetHashCode();
if (Nonce.Length != 0) hash ^= Nonce.GetHashCode();
if (GatewayVersion.Length != 0) hash ^= GatewayVersion.GetHashCode();
if (MaxFrameBytes != 0) hash ^= MaxFrameBytes.GetHashCode();
if (_unknownFields != null) {
hash ^= _unknownFields.GetHashCode();
}
@@ -1211,6 +1234,10 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
output.WriteRawTag(26);
output.WriteString(GatewayVersion);
}
if (MaxFrameBytes != 0) {
output.WriteRawTag(32);
output.WriteUInt32(MaxFrameBytes);
}
if (_unknownFields != null) {
_unknownFields.WriteTo(output);
}
@@ -1233,6 +1260,10 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
output.WriteRawTag(26);
output.WriteString(GatewayVersion);
}
if (MaxFrameBytes != 0) {
output.WriteRawTag(32);
output.WriteUInt32(MaxFrameBytes);
}
if (_unknownFields != null) {
_unknownFields.WriteTo(ref output);
}
@@ -1252,6 +1283,9 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
if (GatewayVersion.Length != 0) {
size += 1 + pb::CodedOutputStream.ComputeStringSize(GatewayVersion);
}
if (MaxFrameBytes != 0) {
size += 1 + pb::CodedOutputStream.ComputeUInt32Size(MaxFrameBytes);
}
if (_unknownFields != null) {
size += _unknownFields.CalculateSize();
}
@@ -1273,6 +1307,9 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
if (other.GatewayVersion.Length != 0) {
GatewayVersion = other.GatewayVersion;
}
if (other.MaxFrameBytes != 0) {
MaxFrameBytes = other.MaxFrameBytes;
}
_unknownFields = pb::UnknownFieldSet.MergeFrom(_unknownFields, other._unknownFields);
}
@@ -1304,6 +1341,10 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
GatewayVersion = input.ReadString();
break;
}
case 32: {
MaxFrameBytes = input.ReadUInt32();
break;
}
}
}
#endif
@@ -1335,6 +1376,10 @@ namespace ZB.MOM.WW.MxGateway.Contracts.Proto {
GatewayVersion = input.ReadString();
break;
}
case 32: {
MaxFrameBytes = input.ReadUInt32();
break;
}
}
}
}
src/ZB.MOM.WW.MxGateway.Contracts/Protos/mxaccess_worker.proto
+6
View File
@@ -42,6 +42,12 @@ message GatewayHello {
uint32 supported_protocol_version = 1;
string nonce = 2;
string gateway_version = 3;
// Maximum worker-frame payload size, in bytes, negotiated by the gateway from its
// configured pipe limit. The worker adopts this as its frame-protocol MaxMessageBytes
// instead of a hard-coded default; 0 (an older gateway that never set the field) means
// "use the worker's built-in default". Sits above the public gRPC cap by an
// envelope-overhead margin so an accepted gRPC payload always fits one worker frame.
uint32 max_frame_bytes = 4;
}
message WorkerHello {