123 lines
3.5 KiB
Python
123 lines
3.5 KiB
Python
"""
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Interest Distribution Cache
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兴趣分布缓存模块
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用于缓存用户的兴趣分布标签数据，避免重复调用模型生成
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"""
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import json
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import logging
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from typing import Optional, List, Dict, Any
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from datetime import datetime
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from app.aioRedis import aio_redis
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logger = logging.getLogger(__name__)
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# 缓存过期时间：24小时
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INTEREST_CACHE_EXPIRE = 86400
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class InterestMemoryCache:
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"""兴趣分布缓存类"""
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PREFIX = "cache:memory:interest_distribution"
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@classmethod
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def _get_key(cls, end_user_id: str, language: str) -> str:
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"""生成 Redis key
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Args:
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end_user_id: 用户ID
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language: 语言类型
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Returns:
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完整的 Redis key
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"""
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return f"{cls.PREFIX}:by_user:{end_user_id}:{language}"
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@classmethod
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async def set_interest_distribution(
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cls,
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end_user_id: str,
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language: str,
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data: List[Dict[str, Any]],
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expire: int = INTEREST_CACHE_EXPIRE,
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) -> bool:
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"""设置用户兴趣分布缓存
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Args:
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end_user_id: 用户ID
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language: 语言类型
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data: 兴趣分布列表，格式 [{"name": "...", "frequency": ...}, ...]
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expire: 过期时间（秒），默认24小时
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Returns:
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是否设置成功
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"""
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try:
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key = cls._get_key(end_user_id, language)
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payload = {
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"data": data,
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"generated_at": datetime.now().isoformat(),
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"cached": True,
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}
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value = json.dumps(payload, ensure_ascii=False)
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await aio_redis.set(key, value, ex=expire)
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logger.info(f"设置兴趣分布缓存成功: {key}, 过期时间: {expire}秒")
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return True
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except Exception as e:
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logger.error(f"设置兴趣分布缓存失败: {e}", exc_info=True)
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return False
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@classmethod
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async def get_interest_distribution(
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cls,
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end_user_id: str,
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language: str,
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) -> Optional[List[Dict[str, Any]]]:
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"""获取用户兴趣分布缓存
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Args:
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end_user_id: 用户ID
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language: 语言类型
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Returns:
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兴趣分布列表，缓存不存在或已过期返回 None
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"""
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try:
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key = cls._get_key(end_user_id, language)
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value = await aio_redis.get(key)
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if value:
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payload = json.loads(value)
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logger.info(f"命中兴趣分布缓存: {key}")
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return payload.get("data")
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logger.info(f"兴趣分布缓存不存在或已过期: {key}")
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return None
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except Exception as e:
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logger.error(f"获取兴趣分布缓存失败: {e}", exc_info=True)
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return None
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@classmethod
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async def delete_interest_distribution(
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cls,
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end_user_id: str,
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language: str,
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) -> bool:
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"""删除用户兴趣分布缓存
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Args:
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end_user_id: 用户ID
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language: 语言类型
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Returns:
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是否删除成功
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"""
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try:
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key = cls._get_key(end_user_id, language)
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result = await aio_redis.delete(key)
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logger.info(f"删除兴趣分布缓存: {key}, 结果: {result}")
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return result > 0
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except Exception as e:
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logger.error(f"删除兴趣分布缓存失败: {e}", exc_info=True)
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return False
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