SecondMiddleware Class — langchain Architecture

Architecture documentation for the SecondMiddleware class in test_wrap_model_call.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  fbc25a15_a4f4_5af8_ad7c_c2b7e11dec7f["SecondMiddleware"]
  949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e["AgentMiddleware"]
  fbc25a15_a4f4_5af8_ad7c_c2b7e11dec7f -->|extends| 949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e
  573473e5_eb93_a7d7_84ba_c975071c09af["test_wrap_model_call.py"]
  fbc25a15_a4f4_5af8_ad7c_c2b7e11dec7f -->|defined in| 573473e5_eb93_a7d7_84ba_c975071c09af
  e58efe94_271d_b76a_624a_d252c3a54aca["wrap_model_call()"]
  fbc25a15_a4f4_5af8_ad7c_c2b7e11dec7f -->|method| e58efe94_271d_b76a_624a_d252c3a54aca

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call.py lines 735–744

        class SecondMiddleware(AgentMiddleware):
            def wrap_model_call(
                self,
                request: ModelRequest,
                handler: Callable[[ModelRequest], ModelResponse],
            ) -> ModelCallResult:
                execution_order.append("second-before")
                response = handler(request)
                execution_order.append("second-after")
                return response