75 lines
2.6 KiB
Python
75 lines
2.6 KiB
Python
from sqlalchemy import create_engine, select, update, insert, delete, and_, or_, text
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from sqlalchemy.orm import Session, sessionmaker
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from sqlalchemy.exc import SQLAlchemyError
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from loguru import logger
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from typing import List, Dict, Optional, Any
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import json
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from config.database import DATABASE_CONFIG, SQLALCHEMY_CONFIG
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from models.orm_models import Base, StrategyPosition, StrategyOrder, StrategyKX
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class DatabaseManager:
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"""数据库管理器"""
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_instance = None
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def __new__(cls):
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if cls._instance is None:
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cls._instance = super().__new__(cls)
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cls._instance._initialized = False
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return cls._instance
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def __init__(self):
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if not self._initialized:
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self._engine = None
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self._session_factory = None
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self._initialized = True
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self._init_engine()
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def _init_engine(self):
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"""初始化数据库引擎"""
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try:
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# 构建数据库URL
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db_url = (
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f"mysql+pymysql://{DATABASE_CONFIG['user']}:{DATABASE_CONFIG['password']}"
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f"@{DATABASE_CONFIG['host']}:{DATABASE_CONFIG['port']}"
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f"/{DATABASE_CONFIG['database']}?charset={DATABASE_CONFIG['charset']}"
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)
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# 创建引擎
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self._engine = create_engine(
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db_url,
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echo=SQLALCHEMY_CONFIG['echo'],
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echo_pool=SQLALCHEMY_CONFIG['echo_pool'],
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pool_size=DATABASE_CONFIG['pool_size'],
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max_overflow=DATABASE_CONFIG['max_overflow'],
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pool_recycle=DATABASE_CONFIG['pool_recycle'],
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pool_pre_ping=SQLALCHEMY_CONFIG['pool_pre_ping']
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)
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# 创建会话工厂
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self._session_factory = sessionmaker(
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bind=self._engine,
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expire_on_commit=False
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)
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# 创建表（如果不存在）
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Base.metadata.create_all(self._engine)
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# logger.info("SQLAlchemy数据库引擎初始化成功")
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except Exception as e:
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logger.error(f"数据库引擎初始化失败: {e}")
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raise
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def get_session(self) -> Session:
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"""获取数据库会话"""
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if self._session_factory is None:
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self._init_engine()
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return self._session_factory()
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def close(self):
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"""关闭数据库连接"""
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if self._engine:
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self._engine.dispose()
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logger.info("数据库连接已关闭") |