38 lines
1.1 KiB
Python
38 lines
1.1 KiB
Python
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from abc import ABC, abstractmethod
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from typing import Dict, Any, Optional
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from datetime import datetime, timedelta
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class BaseService(ABC):
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"""基础服务类，为扩展提供统一接口"""
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def __init__(self):
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self.cache = {}
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self.cache_timeout = timedelta(seconds=30)
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@abstractmethod
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def get_data(self, **kwargs) -> Optional[Dict[str, Any]]:
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"""获取数据的抽象方法"""
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pass
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def get_cached_data(self, cache_key: str, **kwargs) -> Optional[Dict[str, Any]]:
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"""带缓存的数据获取"""
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# 检查缓存
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if cache_key in self.cache:
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cached_item = self.cache[cache_key]
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if datetime.now() - cached_item['timestamp'] < self.cache_timeout:
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return cached_item['data']
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# 获取新数据
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data = self.get_data(**kwargs)
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if data:
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# 更新缓存
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self.cache[cache_key] = {
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'data': data,
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'timestamp': datetime.now()
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}
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return data
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def clear_cache(self):
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"""清理缓存"""
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self.cache.clear()
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