48 lines
2.0 KiB
Python
48 lines
2.0 KiB
Python
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"""核心计算模块的惰性装载器（原 advanced_router._get_cached_import，D1 拆分时上提共用）。
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- 惰性导入：避免路由模块级加载核心包（含 OCC 重模块）的导入开销与循环依赖
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- 装载失败返回 None 且不缓存失败（与原实现一致，端点统一 503「服务不可用」）
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- 实例缓存：设计/加工模块为纯 Python 计算（构造后无 self 突变，方法仅读入参），
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可安全地被 asyncio.to_thread 并发调用；OCC 相关的 side_action_designer
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必须经 processing_service.run_occ 的单线程 executor 使用
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"""
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import threading
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from typing import Optional
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from shared.utils.logger import get_logger
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logger = get_logger(__name__)
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_lock = threading.Lock()
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_instances: dict = {}
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_LOADERS = {
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"side_action_designer": ("moldinsight.core.side_action_designer", "SideActionDesigner"),
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"cavity_layout_optimizer": ("moldinsight.core.cavity_layout_optimizer", "CavityLayoutOptimizer"),
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"mold_system_designer": ("moldinsight.core.mold_system_designer", "MoldSystemDesigner"),
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"mold_cam_designer": ("moldinsight.core.mold_cam", "MoldCAMDesigner"),
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"collision_detector": ("moldinsight.core.mold_machining", "CollisionDetector"),
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"toolpath_optimizer": ("moldinsight.core.mold_machining", "ToolpathOptimizer"),
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"edm_designer": ("moldinsight.core.mold_machining", "EDMElectrodeDesigner"),
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"machining_simulator": ("moldinsight.core.mold_machining", "MachiningSimulator"),
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}
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def get_core_module(key: str):
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if key in _instances:
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return _instances[key]
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if key not in _LOADERS:
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return None
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with _lock:
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if key in _instances:
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return _instances[key]
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module_path, class_name = _LOADERS[key]
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try:
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module = __import__(module_path, fromlist=[class_name])
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instance = getattr(module, class_name)()
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except Exception as e:
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logger.warning(f"核心模块 {key} 加载失败: {e}")
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return None
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_instances[key] = instance
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return instance
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