feat: Add option to deactivate tracing in service settings (langflow-…

…ai#4527)

* Add option to deactivate tracing in service settings

* Add fixture to automatically deactivate tracing in tests using monkeypatch

src/backend/base/langflow/services/settings/base.py

@@ -171,6 +171,8 @@ class Settings(BaseSettings):
     """The maximum number of retries for the health check."""
     max_file_size_upload: int = 100
     """The maximum file size for the upload in MB."""
+    deactivate_tracing: bool = False
+    """If set to True, tracing will be deactivated."""
 
     @field_validator("dev")
     @classmethod

src/backend/base/langflow/services/tracing/service.py

@@ -58,6 +58,7 @@ def __init__(self, settings_service: SettingsService):
         self.running = False
         self.worker_task: asyncio.Task | None = None
         self.end_trace_tasks: set[asyncio.Task] = set()
+        self.deactivated = self.settings_service.settings.deactivate_tracing
 
     async def log_worker(self) -> None:
         while self.running or not self.logs_queue.empty():
@@ -70,7 +71,7 @@ async def log_worker(self) -> None:
                 self.logs_queue.task_done()
 
     async def start(self) -> None:
-        if self.running:
+        if self.running or self.deactivated:
             return
         try:
             self.running = True
@@ -208,6 +209,9 @@ async def trace_context(
         inputs: dict[str, Any],
         metadata: dict[str, Any] | None = None,
     ):
+        if self.deactivated:
+            yield self
+            return
         trace_id = trace_name
         if component._vertex:
             trace_id = component._vertex.id
@@ -251,6 +255,8 @@ def _cleanup_inputs(self, inputs: dict[str, Any]):
         return inputs
 
     def get_langchain_callbacks(self) -> list[BaseCallbackHandler]:
+        if self.deactivated:
+            return []
         callbacks = []
         for tracer in self._tracers.values():
             if not tracer.ready:  # type: ignore[truthy-function]

src/backend/tests/conftest.py

@@ -277,6 +277,13 @@ def json_memory_chatbot_no_llm():
     return pytest.MEMORY_CHATBOT_NO_LLM.read_text(encoding="utf-8")
 
 
+@pytest.fixture(autouse=True)
+def deactivate_tracing(monkeypatch):
+    monkeypatch.setenv("LANGFLOW_DEACTIVATE_TRACING", "true")
+    yield
+    monkeypatch.undo()
+
+
 @pytest.fixture(name="client")
 async def client_fixture(
     session: Session,  # noqa: ARG001