Function load_static_artifacts

sdk/python/feast/feature_server.py:257–300

Load static artifacts (models, lookup tables, etc.) into app.state. This function can be extended to load various types of static artifacts: - Small ML models (scikit-learn, small neural networks) - Lookup tables and reference data - Configuration parameters - Pre-computed

(app: FastAPI, store)

async def load_static_artifacts(app: FastAPI, store):
    """
    Load static artifacts (models, lookup tables, etc.) into app.state.

    This function can be extended to load various types of static artifacts:
    - Small ML models (scikit-learn, small neural networks)
    - Lookup tables and reference data
    - Configuration parameters
    - Pre-computed embeddings

    Note: Not recommended for large language models - use dedicated
    model serving solutions (vLLM, TGI, etc.) for those.
    """
    try:
        # Import here to avoid loading heavy dependencies unless needed
        import importlib.util
        import inspect
        from pathlib import Path

        # Look for static artifacts loading in the feature repository
        # This allows templates and users to define their own artifact loading
        repo_path = Path(store.repo_path) if store.repo_path else Path.cwd()
        artifacts_file = repo_path / "static_artifacts.py"

        if artifacts_file.exists():
            # Load and execute custom static artifacts loading
            spec = importlib.util.spec_from_file_location(
                "static_artifacts", artifacts_file
            )
            if spec and spec.loader:
                artifacts_module = importlib.util.module_from_spec(spec)
                spec.loader.exec_module(artifacts_module)

                # Look for load_artifacts function
                if hasattr(artifacts_module, "load_artifacts"):
                    load_func = artifacts_module.load_artifacts
                    if inspect.iscoroutinefunction(load_func):
                        await load_func(app)
                    else:
                        load_func(app)
                    logger.info("Loaded static artifacts from static_artifacts.py")
    except Exception as e:
        # Non-fatal error - feature server should still start
        logger.warning(f"Failed to load static artifacts: {e}")


def get_app(