AsyncCustomCallbackHandler Class — langchain Architecture

Architecture documentation for the AsyncCustomCallbackHandler class in test_dispatch_custom_event.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  980727a2_4f48_4083_8d2f_4c1b5e1c3bf3["AsyncCustomCallbackHandler"]
  e108f394_9734_a4fd_0bef_19ef9b674d50["AsyncCallbackHandler"]
  980727a2_4f48_4083_8d2f_4c1b5e1c3bf3 -->|extends| e108f394_9734_a4fd_0bef_19ef9b674d50
  f4cde4a2_4706_d7d1_26f9_82085d97a270["test_dispatch_custom_event.py"]
  980727a2_4f48_4083_8d2f_4c1b5e1c3bf3 -->|defined in| f4cde4a2_4706_d7d1_26f9_82085d97a270
  5b65e450_d256_4c88_03c8_b3596bbab615["__init__()"]
  980727a2_4f48_4083_8d2f_4c1b5e1c3bf3 -->|method| 5b65e450_d256_4c88_03c8_b3596bbab615
  9b745a1e_f367_e320_df74_570d69da92b0["on_custom_event()"]
  980727a2_4f48_4083_8d2f_4c1b5e1c3bf3 -->|method| 9b745a1e_f367_e320_df74_570d69da92b0

Relationship Graph

Source Code

libs/core/tests/unit_tests/callbacks/test_dispatch_custom_event.py lines 17–40

class AsyncCustomCallbackHandler(AsyncCallbackHandler):
    def __init__(self) -> None:
        self.events: list[Any] = []

    async def on_custom_event(
        self,
        name: str,
        data: Any,
        *,
        run_id: UUID,
        tags: list[str] | None = None,
        metadata: dict[str, Any] | None = None,
        **kwargs: Any,
    ) -> None:
        assert kwargs == {}
        self.events.append(
            (
                name,
                data,
                run_id,
                tags,
                metadata,
            )
        )