Use official cloud event proto schema

dotnet/src/Microsoft.AutoGen/Abstractions/IAgentWorker.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // IAgentWorker.cs
-
 namespace Microsoft.AutoGen.Abstractions;
 
 public interface IAgentWorker

dotnet/src/Microsoft.AutoGen/Abstractions/MessageExtensions.cs

@@ -17,6 +17,7 @@ public static CloudEvent ToCloudEvent<T>(this T message, string source) where T
             Type = message.Descriptor.FullName,
             Source = source,
             Id = Guid.NewGuid().ToString(),
+            SpecVersion = "1.0",
             Attributes = { { "datacontenttype", new CloudEvent.Types.CloudEventAttributeValue { CeString = PROTO_DATA_CONTENT_TYPE } } }
         };
     }

dotnet/src/Microsoft.AutoGen/Agents/AgentBase.cs

@@ -131,7 +131,7 @@ protected internal async Task HandleRpcMessage(Message msg, CancellationToken ca
         {
             case Message.MessageOneofCase.CloudEvent:
                 {
-                    var activity = this.ExtractActivity(msg.CloudEvent.Type, msg.CloudEvent.Metadata);
+                    var activity = this.ExtractActivity(msg.CloudEvent.Type, msg.CloudEvent.Attributes);
                     await this.InvokeWithActivityAsync(
                         static ((AgentBase Agent, CloudEvent Item) state, CancellationToken _) => state.Agent.CallHandler(state.Item),
                         (this, msg.CloudEvent),

dotnet/src/Microsoft.AutoGen/Agents/AgentBaseExtensions.cs

@@ -2,6 +2,8 @@
 // AgentBaseExtensions.cs
 
 using System.Diagnostics;
+using Google.Protobuf.Collections;
+using static Microsoft.AutoGen.Abstractions.CloudEvent.Types;
 
 namespace Microsoft.AutoGen.Agents;
 
@@ -57,6 +59,11 @@ public static class AgentBaseExtensions
         return activity;
     }
 
+    public static Activity? ExtractActivity(this AgentBase agent, string activityName, MapField<string, CloudEventAttributeValue> metadata)
+    {
+        return ExtractActivity(agent, activityName, metadata.ToDictionary(kvp => kvp.Key, kvp => kvp.Value.CeString));
+    }
+
     /// <summary>
     /// Invokes a function asynchronously within the context of an <see cref="Activity"/>.
     /// </summary>

dotnet/src/Microsoft.AutoGen/Agents/AgentRuntime.cs

@@ -2,8 +2,10 @@
 // AgentRuntime.cs
 
 using System.Diagnostics;
+using Google.Protobuf.Collections;
 using Microsoft.AutoGen.Abstractions;
 using Microsoft.Extensions.Logging;
+using static Microsoft.AutoGen.Abstractions.CloudEvent.Types;
 
 namespace Microsoft.AutoGen.Agents;
 
@@ -28,13 +30,38 @@ internal sealed class AgentRuntime(AgentId agentId, IAgentWorker worker, ILogger
             out var traceState);
         return (traceParent, traceState);
     }
+    public (string?, string?) GetTraceIdAndState(MapField<string, CloudEventAttributeValue> metadata)
+    {
+        DistributedContextPropagator.ExtractTraceIdAndState(metadata,
+            static (object? carrier, string fieldName, out string? fieldValue, out IEnumerable<string>? fieldValues) =>
+            {
+                var metadata = (MapField<string, CloudEventAttributeValue>)carrier!;
+                fieldValues = null;
+                metadata.TryGetValue(fieldName, out var ceValue);
+                fieldValue = ceValue?.CeString;
+            },
+            out var traceParent,
+            out var traceState);
+        return (traceParent, traceState);
+    }
     public void Update(RpcRequest request, Activity? activity = null)
     {
         DistributedContextPropagator.Inject(activity, request.Metadata, static (carrier, key, value) => ((IDictionary<string, string>)carrier!)[key] = value);
     }
     public void Update(CloudEvent cloudEvent, Activity? activity = null)
     {
-        DistributedContextPropagator.Inject(activity, cloudEvent.Metadata, static (carrier, key, value) => ((IDictionary<string, string>)carrier!)[key] = value);
+        DistributedContextPropagator.Inject(activity, cloudEvent.Attributes, static (carrier, key, value) =>
+        {
+            var mapField = (MapField<string, CloudEventAttributeValue>)carrier!;
+            if (mapField.TryGetValue(key, out var ceValue))
+            {
+                mapField[key] = new CloudEventAttributeValue { CeString = value };
+            }
+            else
+            {
+                mapField.Add(key, new CloudEventAttributeValue { CeString = value });
+            }
+        });
     }
     public async ValueTask SendResponseAsync(RpcRequest request, RpcResponse response, CancellationToken cancellationToken = default)
     {
@@ -73,4 +100,17 @@ public IDictionary<string, string> ExtractMetadata(IDictionary<string, string> m
 
         return baggage as IDictionary<string, string> ?? new Dictionary<string, string>();
     }
+
+    public IDictionary<string, string> ExtractMetadata(MapField<string, CloudEventAttributeValue> metadata)
+    {
+        var baggage = DistributedContextPropagator.ExtractBaggage(metadata, static (object? carrier, string fieldName, out string? fieldValue, out IEnumerable<string>? fieldValues) =>
+        {
+            var metadata = (MapField<string, CloudEventAttributeValue>)carrier!;
+            fieldValues = null;
+            metadata.TryGetValue(fieldName, out var ceValue);
+            fieldValue = ceValue?.CeString;
+        });
+
+        return baggage as IDictionary<string, string> ?? new Dictionary<string, string>();
+    }
 }

protos/agent_worker.proto

@@ -117,7 +117,7 @@ message Message {
     oneof message {
         RpcRequest request = 1;
         RpcResponse response = 2;
-        cloudevent.CloudEvent cloudEvent = 3;
+        io.cloudevents.v1.CloudEvent cloudEvent = 3;
         RegisterAgentTypeRequest registerAgentTypeRequest = 4;
         RegisterAgentTypeResponse registerAgentTypeResponse = 5;
         AddSubscriptionRequest addSubscriptionRequest = 6;

protos/cloudevent.proto

@@ -1,6 +1,16 @@
+// https://github.com/cloudevents/spec/blob/main/cloudevents/formats/cloudevents.proto
+
+/**
+ * CloudEvent Protobuf Format
+ *
+ * - Required context attributes are explicitly represented.
+ * - Optional and Extension context attributes are carried in a map structure.
+ * - Data may be represented as binary, text, or protobuf messages.
+ */
+
 syntax = "proto3";
 
-package cloudevent;
+package io.cloudevents.v1;
 
 import "google/protobuf/any.proto";
 import "google/protobuf/timestamp.proto";
@@ -20,12 +30,12 @@ message CloudEvent {
 
   // Optional & Extension Attributes
   map<string, CloudEventAttributeValue> attributes = 5;
-  map<string, string> metadata = 6;
+
   // -- CloudEvent Data (Bytes, Text, or Proto)
   oneof  data {
-    bytes binary_data = 7;
-    string text_data = 8;
-    google.protobuf.Any proto_data = 9;
+    bytes binary_data = 6;
+    string text_data = 7;
+    google.protobuf.Any proto_data = 8;
   }
 
   /**
@@ -45,4 +55,4 @@ message CloudEvent {
       google.protobuf.Timestamp ce_timestamp = 7;
     }
   }
-}
+}

python/packages/autogen-ext/src/autogen_ext/runtimes/grpc/_worker_runtime.py

@@ -626,11 +626,38 @@ async def _process_event(self, event: cloudevent_pb2.CloudEvent) -> None:
             agent = await self._get_agent(agent_id)
             with MessageHandlerContext.populate_context(agent.id):
 
+                def stringify_attributes(
+                    attributes: Mapping[str, cloudevent_pb2.CloudEvent.CloudEventAttributeValue],
+                ) -> Mapping[str, str]:
+                    result: Dict[str, str] = {}
+                    for key, value in attributes.items():
+                        item = None
+                        match value.WhichOneof("attr"):
+                            case "ce_boolean":
+                                item = str(value.ce_boolean)
+                            case "ce_integer":
+                                item = str(value.ce_integer)
+                            case "ce_string":
+                                item = value.ce_string
+                            case "ce_bytes":
+                                item = str(value.ce_bytes)
+                            case "ce_uri":
+                                item = value.ce_uri
+                            case "ce_uri_ref":
+                                item = value.ce_uri_ref
+                            case "ce_timestamp":
+                                item = str(value.ce_timestamp)
+                            case _:
+                                raise ValueError("Unknown attribute kind")
+                        result[key] = item
+
+                    return result
+
                 async def send_message(agent: Agent, message_context: MessageContext) -> Any:
                     with self._trace_helper.trace_block(
                         "process",
                         agent.id,
-                        parent=event.metadata,
+                        parent=stringify_attributes(event.attributes),
                         extraAttributes={"message_type": message_type},
                     ):
                         await agent.on_message(message, ctx=message_context)