back out a2a changes

Author: marcusmotill

src/google/adk/a2a/converters/event_converter.py

@@ -22,8 +22,7 @@
 from typing import Dict
 from typing import List
 from typing import Optional
-
-from google.adk.platform import uuid as platform_uuid
+import uuid
 
 from a2a.server.events import Event as A2AEvent
 from a2a.types import DataPart
@@ -255,7 +254,7 @@ def convert_a2a_task_to_event(
         invocation_id=(
             invocation_context.invocation_id
             if invocation_context
-            else platform_uuid.new_uuid()
+            else str(uuid.uuid4())
         ),
         author=author or "a2a agent",
         branch=invocation_context.branch if invocation_context else None,
@@ -300,7 +299,7 @@ def convert_a2a_message_to_event(
         invocation_id=(
             invocation_context.invocation_id
             if invocation_context
-            else platform_uuid.new_uuid()
+            else str(uuid.uuid4())
         ),
         author=author or "a2a agent",
         branch=invocation_context.branch if invocation_context else None,
@@ -350,7 +349,7 @@ def convert_a2a_message_to_event(
         invocation_id=(
             invocation_context.invocation_id
             if invocation_context
-            else platform_uuid.new_uuid()
+            else str(uuid.uuid4())
         ),
         author=author or "a2a agent",
         branch=invocation_context.branch if invocation_context else None,
@@ -409,7 +408,7 @@ def convert_event_to_a2a_message(
 
     if output_parts:
       return Message(
-          message_id=platform_uuid.new_uuid(), role=role, parts=output_parts
+          message_id=str(uuid.uuid4()), role=role, parts=output_parts
       )
 
   except Exception as e:
@@ -450,7 +449,7 @@ def _create_error_status_event(
       status=TaskStatus(
           state=TaskState.failed,
           message=Message(
-              message_id=platform_uuid.new_uuid(),
+              message_id=str(uuid.uuid4()),
               role=Role.agent,
               parts=[TextPart(text=error_message)],
               metadata={

tests/unittests/a2a/converters/test_event_converter.py

@@ -742,7 +742,7 @@ def test_convert_a2a_task_to_event_no_message(self):
     assert result.branch == "test-branch"
     assert result.invocation_id == "test-invocation-id"
 
-  @patch("google.adk.a2a.converters.event_converter.platform_uuid.new_uuid")
+  @patch("google.adk.a2a.converters.event_converter.uuid.uuid4")
   def test_convert_a2a_task_to_event_default_author(self, mock_uuid):
     """Test converting A2A task with default author and no invocation context."""
     from google.adk.a2a.converters.event_converter import convert_a2a_task_to_event
@@ -974,7 +974,7 @@ def test_convert_a2a_message_to_event_missing_tool_id(self):
     # Parts will be empty since conversion returned None
     assert len(result.content.parts) == 0
 
-  @patch("google.adk.a2a.converters.event_converter.platform_uuid.new_uuid")
+  @patch("google.adk.a2a.converters.event_converter.uuid.uuid4")
   def test_convert_a2a_message_to_event_default_author(self, mock_uuid):
     """Test conversion with default author and no invocation context."""
     from google.adk.a2a.converters.event_converter import convert_a2a_message_to_event