chore!: Switch tracing APIs in preview AdkApp.

Currently AdkApp uses `cloudtrace.googleapis.com` for GCP tracing.
This change switches it to `telemetry.googleapis.com`.
It's a breaking change as users might need to enable the new API.

PiperOrigin-RevId: 825486202

Author: vertex-sdk-bot

setup.py

@@ -151,6 +151,7 @@
     "google-cloud-trace < 2",
     "opentelemetry-sdk < 2",
     "opentelemetry-exporter-gcp-trace < 2",
+    "opentelemetry-exporter-otlp-proto-http < 2",
     "pydantic >= 2.11.1, < 3",
     "typing_extensions",
 ]

tests/unit/vertex_adk/test_reasoning_engine_templates_adk.py

@@ -16,7 +16,6 @@
 import base64
 import importlib
 import json
-import dataclasses
 import os
 from unittest import mock
 from typing import Optional
@@ -112,27 +111,11 @@ def simple_span_processor_mock():
 
 
 @pytest.fixture
-def cloud_trace_exporter_mock():
-    import sys
-    import opentelemetry
-
-    mock_cloud_trace_exporter = mock.Mock()
-
-    opentelemetry.exporter = type(sys)("exporter")
-    opentelemetry.exporter.cloud_trace = type(sys)("cloud_trace")
-    opentelemetry.exporter.cloud_trace.CloudTraceSpanExporter = (
-        mock_cloud_trace_exporter
-    )
-
-    sys.modules["opentelemetry.exporter"] = opentelemetry.exporter
-    sys.modules["opentelemetry.exporter.cloud_trace"] = (
-        opentelemetry.exporter.cloud_trace
-    )
-
-    yield mock_cloud_trace_exporter
-
-    del sys.modules["opentelemetry.exporter.cloud_trace"]
-    del sys.modules["opentelemetry.exporter"]
+def otlp_span_exporter_mock():
+    with mock.patch(
+        "opentelemetry.exporter.otlp.proto.http.trace_exporter.OTLPSpanExporter"
+    ) as otlp_span_exporter_mock:
+        yield otlp_span_exporter_mock
 
 
 @pytest.fixture
@@ -619,9 +602,9 @@ def test_default_instrumentor_enablement(
     )
     def test_tracing_setup(
         self,
-        trace_provider_mock: mock.Mock,
-        cloud_trace_exporter_mock: mock.Mock,
         monkeypatch: pytest.MonkeyPatch,
+        trace_provider_mock: mock.Mock,
+        otlp_span_exporter_mock: mock.Mock,
     ):
         monkeypatch.setattr(
             "uuid.uuid4", lambda: uuid.UUID("12345678123456781234567812345678")
@@ -643,17 +626,9 @@ def test_tracing_setup(
             "some-attribute": "some-value",
         }
 
-        @dataclasses.dataclass
-        class RegexMatchingAll:
-            keys: set[str]
-
-            def __eq__(self, regex: object) -> bool:
-                return isinstance(regex, str) and set(regex.split("|")) == self.keys
-
-        cloud_trace_exporter_mock.assert_called_once_with(
-            project_id=_TEST_PROJECT,
-            client=mock.ANY,
-            resource_regex=RegexMatchingAll(keys=set(expected_attributes.keys())),
+        otlp_span_exporter_mock.assert_called_once_with(
+            session=mock.ANY,
+            endpoint="https://telemetry.googleapis.com/v1/traces",
         )
 
         assert (
@@ -685,7 +660,6 @@ def test_span_content_capture_enabled_with_tracing(self):
     def test_enable_tracing(
         self,
         caplog,
-        cloud_trace_exporter_mock,
         tracer_provider_mock,
         simple_span_processor_mock,
     ):

vertexai/preview/reasoning_engines/templates/adk.py

@@ -233,6 +233,28 @@ def _warn(msg: str):
     _warn._LOGGER.warning(msg)  # pyright: ignore[reportFunctionMemberAccess]
 
 
+def _force_flush_traces():
+    try:
+        import opentelemetry.trace
+    except (ImportError, AttributeError):
+        _warn(
+            "Could not force flush traces. opentelemetry-api is not installed. Please call  'pip install google-cloud-aiplatform[agent_engines]'."
+        )
+        return None
+
+    try:
+        import opentelemetry.sdk.trace
+    except (ImportError, AttributeError):
+        _warn(
+            "Could not force flush traces. opentelemetry-sdk is not installed. Please call  'pip install google-cloud-aiplatform[agent_engines]'."
+        )
+        return None
+
+    provider = opentelemetry.trace.get_tracer_provider()
+    if isinstance(provider, opentelemetry.sdk.trace.TracerProvider):
+        _ = provider.force_flush()
+
+
 def _default_instrumentor_builder(
     project_id: str,
     *,
@@ -313,28 +335,23 @@ def _detect_cloud_resource_id(project_id: str) -> Optional[str]:
 
     if enable_tracing:
         try:
-            import opentelemetry.exporter.cloud_trace
-        except (ImportError, AttributeError):
-            return _warn_missing_dependency(
-                "opentelemetry-exporter-gcp-trace", needed_for_tracing=True
-            )
-
-        try:
-            import google.cloud.trace_v2
+            import opentelemetry.exporter.otlp.proto.http.trace_exporter
+            import google.auth.transport.requests
         except (ImportError, AttributeError):
             return _warn_missing_dependency(
-                "google-cloud-trace", needed_for_tracing=True
+                "opentelemetry-exporter-otlp-proto-http", needed_for_tracing=True
             )
 
         import google.auth
 
         credentials, _ = google.auth.default()
-        span_exporter = opentelemetry.exporter.cloud_trace.CloudTraceSpanExporter(
-            project_id=project_id,
-            client=google.cloud.trace_v2.TraceServiceClient(
-                credentials=credentials.with_quota_project(project_id),
-            ),
-            resource_regex="|".join(resource.attributes.keys()),
+        span_exporter = (
+            opentelemetry.exporter.otlp.proto.http.trace_exporter.OTLPSpanExporter(
+                session=google.auth.transport.requests.AuthorizedSession(
+                    credentials=credentials
+                ),
+                endpoint="https://telemetry.googleapis.com/v1/traces",
+            )
         )
         span_processor = opentelemetry.sdk.trace.export.BatchSpanProcessor(
             span_exporter=span_exporter,
@@ -874,9 +891,14 @@ async def async_stream_query(
                 **kwargs,
             )
 
-        async for event in events_async:
-            # Yield the event data as a dictionary
-            yield _utils.dump_event_for_json(event)
+        try:
+            async for event in events_async:
+                # Yield the event data as a dictionary
+                yield _utils.dump_event_for_json(event)
+        finally:
+            # Avoid trace data loss having to do with CPU throttling on instance turndown
+            if self._tracing_enabled():
+                _force_flush_traces()
 
     def streaming_agent_run_with_events(self, request_json: str):
         import json
@@ -937,6 +959,9 @@ async def _invoke_agent_async():
                         user_id=request.user_id,
                         session_id=session.id,
                     )
+                # Avoid trace data loss having to do with CPU throttling on instance turndown
+                if self._tracing_enabled():
+                    _force_flush_traces()
 
         def _asyncio_thread_main():
             try: