creat

Signed-off-by: TIANHE <TIANHE@GMAIL.COM>

backend_api_python/app/services/kline.py

@@ -0,0 +1,73 @@
+"""
+K线数据服务
+"""
+from typing import Dict, List, Any, Optional
+
+from app.data_sources import DataSourceFactory
+from app.utils.cache import CacheManager
+from app.utils.logger import get_logger
+from app.config import CacheConfig
+
+logger = get_logger(__name__)
+
+
+class KlineService:
+    """K线数据服务"""
+    
+    def __init__(self):
+        self.cache = CacheManager()
+        self.cache_ttl = CacheConfig.KLINE_CACHE_TTL
+    
+    def get_kline(
+        self,
+        market: str,
+        symbol: str,
+        timeframe: str,
+        limit: int = 300,
+        before_time: Optional[int] = None
+    ) -> List[Dict[str, Any]]:
+        """
+        获取K线数据
+        
+        Args:
+            market: 市场类型 (Crypto, USStock, AShare, HShare, Forex, Futures)
+            symbol: 交易对/股票代码
+            timeframe: 时间周期
+            limit: 数据条数
+            before_time: 获取此时间之前的数据
+            
+        Returns:
+            K线数据列表
+        """
+        # 构建缓存键（历史数据不缓存）
+        if not before_time:
+            cache_key = f"kline:{market}:{symbol}:{timeframe}:{limit}"
+            cached = self.cache.get(cache_key)
+            if cached:
+                # logger.info(f"命中缓存: {cache_key}")
+                return cached
+        
+        # 获取数据
+        klines = DataSourceFactory.get_kline(
+            market=market,
+            symbol=symbol,
+            timeframe=timeframe,
+            limit=limit,
+            before_time=before_time
+        )
+        
+        # 设置缓存（仅最新数据）
+        if klines and not before_time:
+            ttl = self.cache_ttl.get(timeframe, 300)
+            self.cache.set(cache_key, klines, ttl)
+            # logger.info(f"缓存设置: {cache_key}, TTL: {ttl}s")
+        
+        return klines
+    
+    def get_latest_price(self, market: str, symbol: str) -> Optional[Dict[str, Any]]:
+        """获取最新价格"""
+        klines = self.get_kline(market, symbol, '1m', 1)
+        if klines:
+            return klines[-1]
+        return None
+