51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
"""MySQL 业务库数据源（同步）"""
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from typing import Optional
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from sqlalchemy import Engine, create_engine
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from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
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from app.config import settings
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from app.core.logger import log
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# ──────────── 内部变量 ────────────
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_mysql_engine: Optional[Engine] = None
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_mysql_session_factory: Optional[sessionmaker[Session]] = None
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class MysqlBase(DeclarativeBase):
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"""MySQL ORM 声明基类"""
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pass
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def init_db() -> None:
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"""初始化 MySQL 数据源"""
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global _mysql_engine, _mysql_session_factory
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_mysql_engine = create_engine(
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settings.mysql_url,
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pool_size=settings.mysql_pool_size,
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max_overflow=settings.mysql_max_overflow,
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pool_timeout=settings.db_pool_timeout,
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pool_recycle=3600,
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pool_pre_ping=True,
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echo=False,
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)
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_mysql_session_factory = sessionmaker(_mysql_engine, expire_on_commit=False)
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log.info("MySQL 数据源初始化完成: {}", settings.db_host)
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def close_db() -> None:
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"""关闭 MySQL 数据源"""
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if _mysql_engine:
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_mysql_engine.dispose()
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log.info("MySQL 数据源已关闭")
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def MysqlSession() -> Session:
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"""获取 MySQL 会话（用作 with MysqlSession() as session）"""
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if _mysql_session_factory is None:
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raise RuntimeError("数据库未初始化，请先调用 init_db()")
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return _mysql_session_factory()
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