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✨ 更新数据访问层，优化获取数据的方法并引入缓存机制
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HibiKier
parent
135c6d83bf
commit
172dab2dd3
@ -51,7 +51,7 @@ async def build_html_help():
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}
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},
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pages={
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"viewport": {"width": 1024, "height": 1024},
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"viewport": {"width": 824, "height": 10},
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"base_url": f"file://{TEMPLATE_PATH}",
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},
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wait=2,
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@ -147,10 +147,14 @@ class DataAccess(Generic[T]):
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return str(kwargs[self.key_field])
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return None
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async def safe_get_or_none(self, *args, **kwargs) -> T | None:
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"""安全的获取单条数据
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async def _get_with_cache(
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self, db_query_func, allow_not_exist: bool = True, *args, **kwargs
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) -> T | None:
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"""带缓存的通用获取方法
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参数:
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db_query_func: 数据库查询函数
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allow_not_exist: 是否允许数据不存在
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*args: 查询参数
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**kwargs: 查询参数
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@ -161,8 +165,8 @@ class DataAccess(Generic[T]):
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if not self.cache_type or cache_config.cache_mode == CacheMode.NONE:
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logger.debug(f"{self.model_cls.__name__} 直接从数据库获取数据: {kwargs}")
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return await with_db_timeout(
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self.model_cls.safe_get_or_none(*args, **kwargs),
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operation=f"{self.model_cls.__name__}.safe_get_or_none",
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db_query_func(*args, **kwargs),
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operation=f"{self.model_cls.__name__}.{db_query_func.__name__}",
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)
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# 尝试从缓存获取
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@ -184,6 +188,11 @@ class DataAccess(Generic[T]):
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logger.debug(
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f"{self.model_cls.__name__} 从缓存获取到空结果: {cache_key}"
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)
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if allow_not_exist:
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logger.debug(
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f"{self.model_cls.__name__} 从缓存获取"
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f"到空结果: {cache_key}, 允许数据不存在，返回None"
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)
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return None
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elif data:
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# 缓存命中
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@ -201,7 +210,7 @@ class DataAccess(Generic[T]):
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# 如果缓存中没有，从数据库获取
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logger.debug(f"{self.model_cls.__name__} 从数据库获取数据: {kwargs}")
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data = await self.model_cls.safe_get_or_none(*args, **kwargs)
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data = await db_query_func(*args, **kwargs)
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# 如果获取到数据，存入缓存
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if data:
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@ -238,92 +247,52 @@ class DataAccess(Generic[T]):
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return data
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async def get_or_none(self, *args, **kwargs) -> T | None:
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async def get_or_none(
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self, allow_not_exist: bool = True, *args, **kwargs
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) -> T | None:
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"""获取单条数据
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参数:
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allow_not_exist: 是否允许数据不存在
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*args: 查询参数
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**kwargs: 查询参数
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返回:
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Optional[T]: 查询结果，如果不存在返回None
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"""
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# 如果没有缓存类型，直接从数据库获取
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if not self.cache_type or cache_config.cache_mode == CacheMode.NONE:
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logger.debug(f"{self.model_cls.__name__} 直接从数据库获取数据: {kwargs}")
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return await with_db_timeout(
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self.model_cls.get_or_none(*args, **kwargs),
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operation=f"{self.model_cls.__name__}.get_or_none",
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return await self._get_with_cache(
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self.model_cls.get_or_none, allow_not_exist, *args, **kwargs
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)
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# 尝试从缓存获取
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cache_key = None
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try:
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# 尝试构建缓存键
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cache_key = self._build_cache_key_from_kwargs(**kwargs)
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async def safe_get_or_none(
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self, allow_not_exist: bool = True, *args, **kwargs
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) -> T | None:
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"""安全的获取单条数据
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# 如果成功构建缓存键，尝试从缓存获取
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if cache_key is not None:
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data = await self.cache.get(cache_key)
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if data == self._NULL_RESULT:
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# 空结果缓存命中
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self._cache_stats[self.cache_type]["null_hits"] += 1
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logger.debug(
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f"{self.model_cls.__name__} 从缓存获取到空结果: {cache_key}"
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)
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return None
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elif data:
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# 缓存命中
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self._cache_stats[self.cache_type]["hits"] += 1
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logger.debug(
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f"{self.model_cls.__name__} 从缓存获取数据成功: {cache_key}"
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)
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return cast(T, data)
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else:
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# 缓存未命中
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self._cache_stats[self.cache_type]["misses"] += 1
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logger.debug(f"{self.model_cls.__name__} 缓存未命中: {cache_key}")
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except Exception as e:
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logger.error(f"{self.model_cls.__name__} 从缓存获取数据失败: {kwargs}", e=e)
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参数:
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allow_not_exist: 是否允许数据不存在
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*args: 查询参数
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**kwargs: 查询参数
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# 如果缓存中没有，从数据库获取
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logger.debug(f"{self.model_cls.__name__} 从数据库获取数据: {kwargs}")
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data = await self.model_cls.get_or_none(*args, **kwargs)
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# 如果获取到数据，存入缓存
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if data:
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try:
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cache_key = self._build_cache_key_for_item(data)
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# 生成缓存键
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if cache_key is not None:
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# 存入缓存
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await self.cache.set(cache_key, data)
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self._cache_stats[self.cache_type]["sets"] += 1
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logger.debug(
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f"{self.model_cls.__name__} 数据已存入缓存: {cache_key}"
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)
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except Exception as e:
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logger.error(
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f"{self.model_cls.__name__} 存入缓存失败，参数: {kwargs}", e=e
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)
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elif cache_key is not None:
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# 如果没有获取到数据，缓存空结果
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try:
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# 存入空结果缓存，使用较短的过期时间
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await self.cache.set(
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cache_key, self._NULL_RESULT, expire=self._NULL_RESULT_TTL
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)
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self._cache_stats[self.cache_type]["null_sets"] += 1
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logger.debug(
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f"{self.model_cls.__name__} 空结果已存入缓存: {cache_key},"
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f" TTL={self._NULL_RESULT_TTL}秒"
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)
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except Exception as e:
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logger.error(
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f"{self.model_cls.__name__} 存入空结果缓存失败，参数: {kwargs}", e=e
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返回:
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Optional[T]: 查询结果，如果不存在返回None
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"""
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return await self._get_with_cache(
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self.model_cls.safe_get_or_none, allow_not_exist, *args, **kwargs
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)
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return data
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async def get_by_func_or_none(
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self, func, allow_not_exist: bool = True, *args, **kwargs
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) -> T | None:
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"""根据函数获取数据
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参数:
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func: 函数
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allow_not_exist: 是否允许数据不存在
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*args: 查询参数
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**kwargs: 查询参数
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"""
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return await self._get_with_cache(func, allow_not_exist, *args, **kwargs)
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async def clear_cache(self, **kwargs) -> bool:
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"""只清除缓存，不影响数据库数据
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