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perf: 添加多层缓存优化减少数据库查询
- 新增 ProviderCacheService 缓存 Provider 和 ProviderAPIKey 数据 - SystemConfigService 添加进程内缓存(TTL 60秒) - API Key last_used_at 更新添加节流策略(60秒间隔) - HTTP 连接池配置改为可配置,支持根据 Worker 数量自动计算 - 前端优先级管理改用 health_score 显示健康度
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171
src/services/cache/provider_cache.py
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171
src/services/cache/provider_cache.py
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"""
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Provider 缓存服务 - 减少 Provider 和 ProviderAPIKey 查询
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用于缓存 Provider 的 billing_type 和 ProviderAPIKey 的 rate_multiplier,
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这些数据在 UsageService.record_usage() 中被频繁查询但变化不频繁。
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"""
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from typing import Optional, Tuple
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from sqlalchemy.orm import Session
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from src.config.constants import CacheTTL
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from src.core.cache_service import CacheService
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from src.core.enums import ProviderBillingType
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from src.core.logger import logger
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from src.models.database import Provider, ProviderAPIKey
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class ProviderCacheService:
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"""Provider 缓存服务
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提供 Provider 和 ProviderAPIKey 的缓存查询功能,减少数据库访问。
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主要用于 UsageService 中获取费率倍数和计费类型。
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"""
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CACHE_TTL = CacheTTL.PROVIDER # 5 分钟
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@staticmethod
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async def get_provider_api_key_rate_multiplier(
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db: Session, provider_api_key_id: str
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) -> Optional[float]:
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"""
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获取 ProviderAPIKey 的 rate_multiplier(带缓存)
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Args:
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db: 数据库会话
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provider_api_key_id: ProviderAPIKey ID
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Returns:
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rate_multiplier 或 None(如果找不到)
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"""
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cache_key = f"provider_api_key:rate_multiplier:{provider_api_key_id}"
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# 1. 尝试从缓存获取
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cached_data = await CacheService.get(cache_key)
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if cached_data is not None:
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logger.debug(f"ProviderAPIKey rate_multiplier 缓存命中: {provider_api_key_id[:8]}...")
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# 缓存的 "NOT_FOUND" 表示数据库中不存在
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if cached_data == "NOT_FOUND":
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return None
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return float(cached_data)
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# 2. 缓存未命中,查询数据库
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provider_key = (
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db.query(ProviderAPIKey.rate_multiplier)
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.filter(ProviderAPIKey.id == provider_api_key_id)
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.first()
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)
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# 3. 写入缓存
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if provider_key:
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rate_multiplier = provider_key.rate_multiplier or 1.0
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await CacheService.set(
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cache_key, rate_multiplier, ttl_seconds=ProviderCacheService.CACHE_TTL
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)
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logger.debug(f"ProviderAPIKey rate_multiplier 已缓存: {provider_api_key_id[:8]}...")
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return rate_multiplier
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else:
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# 缓存负结果
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await CacheService.set(
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cache_key, "NOT_FOUND", ttl_seconds=ProviderCacheService.CACHE_TTL
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)
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return None
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@staticmethod
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async def get_provider_billing_type(
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db: Session, provider_id: str
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) -> Optional[ProviderBillingType]:
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"""
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获取 Provider 的 billing_type(带缓存)
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Args:
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db: 数据库会话
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provider_id: Provider ID
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Returns:
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billing_type 或 None(如果找不到)
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"""
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cache_key = f"provider:billing_type:{provider_id}"
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# 1. 尝试从缓存获取
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cached_data = await CacheService.get(cache_key)
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if cached_data is not None:
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logger.debug(f"Provider billing_type 缓存命中: {provider_id[:8]}...")
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if cached_data == "NOT_FOUND":
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return None
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try:
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return ProviderBillingType(cached_data)
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except ValueError:
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# 缓存值无效,删除并重新查询
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await CacheService.delete(cache_key)
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# 2. 缓存未命中,查询数据库
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provider = (
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db.query(Provider.billing_type).filter(Provider.id == provider_id).first()
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)
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# 3. 写入缓存
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if provider:
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billing_type = provider.billing_type
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await CacheService.set(
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cache_key, billing_type.value, ttl_seconds=ProviderCacheService.CACHE_TTL
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)
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logger.debug(f"Provider billing_type 已缓存: {provider_id[:8]}...")
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return billing_type
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else:
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# 缓存负结果
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await CacheService.set(
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cache_key, "NOT_FOUND", ttl_seconds=ProviderCacheService.CACHE_TTL
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)
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return None
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@staticmethod
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async def get_rate_multiplier_and_free_tier(
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db: Session,
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provider_api_key_id: Optional[str],
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provider_id: Optional[str],
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) -> Tuple[float, bool]:
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"""
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获取费率倍数和是否免费套餐(带缓存)
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这是 UsageService._get_rate_multiplier_and_free_tier 的缓存版本。
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Args:
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db: 数据库会话
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provider_api_key_id: ProviderAPIKey ID(可选)
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provider_id: Provider ID(可选)
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Returns:
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(rate_multiplier, is_free_tier) 元组
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"""
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actual_rate_multiplier = 1.0
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is_free_tier = False
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# 获取费率倍数
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if provider_api_key_id:
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rate_multiplier = await ProviderCacheService.get_provider_api_key_rate_multiplier(
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db, provider_api_key_id
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)
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if rate_multiplier is not None:
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actual_rate_multiplier = rate_multiplier
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# 获取计费类型
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if provider_id:
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billing_type = await ProviderCacheService.get_provider_billing_type(db, provider_id)
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if billing_type == ProviderBillingType.FREE_TIER:
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is_free_tier = True
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return actual_rate_multiplier, is_free_tier
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@staticmethod
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async def invalidate_provider_api_key_cache(provider_api_key_id: str) -> None:
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"""清除 ProviderAPIKey 缓存"""
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await CacheService.delete(f"provider_api_key:rate_multiplier:{provider_api_key_id}")
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logger.debug(f"ProviderAPIKey 缓存已清除: {provider_api_key_id[:8]}...")
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@staticmethod
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async def invalidate_provider_cache(provider_id: str) -> None:
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"""清除 Provider 缓存"""
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await CacheService.delete(f"provider:billing_type:{provider_id}")
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logger.debug(f"Provider 缓存已清除: {provider_id[:8]}...")
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