on_retriever_end() — langchain Function Reference

Architecture documentation for the on_retriever_end() function in base.py from the langchain codebase.

Function python Observability Tracers calls 3 called by 1

Entity Profile

Observability→ Tracers→ on_retriever_end() — langchain Function Reference

Dependency Diagram

graph TD
  79b77983_02f3_5ce1_e3b6_b81546f14738["on_retriever_end()"]
  b3ab8001_c14c_4191_ca53_2dbabc99917f["AsyncBaseTracer"]
  79b77983_02f3_5ce1_e3b6_b81546f14738 -->|defined in| b3ab8001_c14c_4191_ca53_2dbabc99917f
  dd74ebdd_0815_8034_9cc9_bd0477479388["on_retriever_end()"]
  dd74ebdd_0815_8034_9cc9_bd0477479388 -->|calls| 79b77983_02f3_5ce1_e3b6_b81546f14738
  a962822f_f5be_755c_cef6_a8eeb2b06eb5["_end_trace()"]
  79b77983_02f3_5ce1_e3b6_b81546f14738 -->|calls| a962822f_f5be_755c_cef6_a8eeb2b06eb5
  b4ff7b44_e60f_4f8a_171b_432106ae9621["_on_retriever_end()"]
  79b77983_02f3_5ce1_e3b6_b81546f14738 -->|calls| b4ff7b44_e60f_4f8a_171b_432106ae9621
  dd74ebdd_0815_8034_9cc9_bd0477479388["on_retriever_end()"]
  79b77983_02f3_5ce1_e3b6_b81546f14738 -->|calls| dd74ebdd_0815_8034_9cc9_bd0477479388
  style 79b77983_02f3_5ce1_e3b6_b81546f14738 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/tracers/base.py lines 851–865

    async def on_retriever_end(
        self,
        documents: Sequence[Document],
        *,
        run_id: UUID,
        parent_run_id: UUID | None = None,
        tags: list[str] | None = None,
        **kwargs: Any,
    ) -> None:
        retrieval_run = self._complete_retrieval_run(
            documents=documents,
            run_id=run_id,
        )
        tasks = [self._end_trace(retrieval_run), self._on_retriever_end(retrieval_run)]
        await asyncio.gather(*tasks)