refactor: Update logs to outputs in CustomComponent and TracingService classes

src/backend/base/langflow/custom/custom_component/custom_component.py

@@ -16,6 +16,7 @@ from langflow.schema.message import Message
 from langflow.schema.schema import OutputLog
 from langflow.services.deps import get_storage_service, get_variable_service, session_scope
 from langflow.services.storage.service import StorageService
+from langflow.services.tracing.schema import Log
 from langflow.type_extraction.type_extraction import (
     extract_inner_type_from_generic_alias,
     extract_union_types_from_generic_alias,
@@ -82,7 +83,8 @@ class CustomComponent(BaseComponent):
     status: Optional[Any] = None
     """The status of the component. This is displayed on the frontend. Defaults to None."""
     _flows_data: Optional[List[Data]] = None
-    _logs: List[OutputLog] = []
+    _outputs: List[OutputLog] = []
+    _logs: List[Log] = []
     tracing_service: Optional["TracingService"] = None
 
     def update_state(self, name: str, value: Any):
@@ -481,12 +483,15 @@ class CustomComponent(BaseComponent):
         """
         raise NotImplementedError
 
-    def log(self, message: LoggableType | list[LoggableType]):
+    def log(self, message: LoggableType | list[LoggableType], name: str | None = None):
         """
         Logs a message.
 
         Args:
             message (LoggableType | list[LoggableType]): The message to log.
         """
-        log = OutputLog(message=message, type=get_artifact_type(message))
+        if name is None:
+            name = self.display_name
+        log = Log(message=message, type=get_artifact_type(message), name=name)
         self._logs.append(log)
+        self.tracing_service.add_log(trace_name=self.vertex.id, log=log)

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

@@ -0,0 +1,7 @@
+from typing_extensions import TypedDict
+
+
+class Log(TypedDict):
+    name: str
+    message: list | dict | str
+    type: str

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

@@ -1,6 +1,7 @@
 import os
 import traceback
 from contextlib import contextmanager
+from datetime import datetime, timezone
 from typing import TYPE_CHECKING, Any, Dict
 
 from langchain.callbacks.tracers.langchain import wait_for_all_tracers
@@ -8,6 +9,7 @@ from loguru import logger
 
 from langflow.schema.data import Data
 from langflow.services.base import Service
+from langflow.services.tracing.schema import Log
 
 if TYPE_CHECKING:
     from langflow.services.monitor.service import MonitorService
@@ -79,6 +81,15 @@ class TracingService(Service):
         self._end_all_traces(outputs, error)
         self._reset_io()
 
+    async def add_log(self, trace_name: str, log: Log):
+        for tracer in self._tracers.values():
+            if not tracer.ready:
+                continue
+            try:
+                tracer.add_log(trace_name, log)
+            except Exception as e:
+                logger.error(f"Error adding log to trace {trace_name}: {e}")
+
     @contextmanager
     def trace_context(
         self, trace_name: str, trace_type: str, inputs: Dict[str, Any] = None, metadata: Dict[str, Any] = None
@@ -189,6 +200,11 @@ class LangSmithTracer:
             child.patch()
         else:
             child.post()
+        self._child_link[trace_name] = child.get_url()
+
+    def add_log(self, trace_name: str, log: Log):
+        log_dict = {"name": log.name, "time": datetime.now(timezone.utc).isoformat(), "message": log.message}
+        self._children[trace_name].add_event(log_dict)
 
     def end(self, outputs: Dict[str, Any], error: str | None = None):
         self._run_tree.end(outputs=outputs, error=error)