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SessionContextMiddleware Class — langchain Architecture

Architecture documentation for the SessionContextMiddleware class in test_middleware_typing.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  4e091ec1_acac_fc6c_1a58_721a8f5a8144["SessionContextMiddleware"]
  689eac1f_5845_440c_f60b_988968e02ee6["test_middleware_typing.py"]
  4e091ec1_acac_fc6c_1a58_721a8f5a8144 -->|defined in| 689eac1f_5845_440c_f60b_988968e02ee6
  49656a4f_63df_ab8c_f944_ca02d501578d["wrap_model_call()"]
  4e091ec1_acac_fc6c_1a58_721a8f5a8144 -->|method| 49656a4f_63df_ab8c_f944_ca02d501578d

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_typing.py lines 137–147

class SessionContextMiddleware(AgentMiddleware[AgentState[Any], SessionContext, Any]):
    """Middleware with correctly specified SessionContext."""

    def wrap_model_call(
        self,
        request: ModelRequest[SessionContext],
        handler: Callable[[ModelRequest[SessionContext]], ModelResponse[Any]],
    ) -> ModelResponse[Any]:
        _session_id: str = request.runtime.context["session_id"]
        _expires: int = request.runtime.context["expires_at"]
        return handler(request)

Defined In

Source

Frequently Asked Questions

What is the SessionContextMiddleware class?
SessionContextMiddleware is a class in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_typing.py.
Where is SessionContextMiddleware defined?
SessionContextMiddleware is defined in libs/langchain_v1/tests/unit_tests/agents/middleware_typing/test_middleware_typing.py at line 137.

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