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OldStyleAsyncMiddleware Class — langchain Architecture

Architecture documentation for the OldStyleAsyncMiddleware class in test_middleware_backwards_compat.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  eea86baf_3982_b598_bf6c_bb3a6f1d43a6["OldStyleAsyncMiddleware"]
  74d2d22f_07ae_c5bb_33c3_7da58e2da5a0["test_middleware_backwards_compat.py"]
  eea86baf_3982_b598_bf6c_bb3a6f1d43a6 -->|defined in| 74d2d22f_07ae_c5bb_33c3_7da58e2da5a0
  47dc9e21_f0bf_5466_2308_34c1d2685a53["awrap_model_call()"]
  eea86baf_3982_b598_bf6c_bb3a6f1d43a6 -->|method| 47dc9e21_f0bf_5466_2308_34c1d2685a53

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_backwards_compat.py lines 115–123

class OldStyleAsyncMiddleware(AgentMiddleware[AgentState[Any], ContextT]):
    """Async middleware with old 2-param pattern."""

    async def awrap_model_call(
        self,
        request: ModelRequest[ContextT],
        handler: Callable[[ModelRequest[ContextT]], Awaitable[ModelResponse]],
    ) -> ModelResponse:
        return await handler(request)

Defined In

Source

Frequently Asked Questions

What is the OldStyleAsyncMiddleware class?
OldStyleAsyncMiddleware is a class in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_backwards_compat.py.
Where is OldStyleAsyncMiddleware defined?
OldStyleAsyncMiddleware is defined in libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_backwards_compat.py at line 115.

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