232 lines
7.4 KiB
Python
232 lines
7.4 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import os
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import logging
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from typing import Dict, Any, List, Optional, Union
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from datetime import datetime
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker
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from sqlalchemy.pool import QueuePool
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from cryptoai.utils.config_loader import ConfigLoader
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from cryptoai.models.base import Base
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from cryptoai.models.token import TokenManager
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from cryptoai.models.analysis_result import AnalysisResultManager
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from cryptoai.models.user import UserManager
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from cryptoai.models.user_question import UserQuestionManager
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from cryptoai.models.astock import AStockManager
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from cryptoai.models.analysis_history import AnalysisHistoryManager
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# 配置日志
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logging.basicConfig(
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level=logging.INFO,
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format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
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)
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logger = logging.getLogger('db_manager')
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class DBManager:
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"""
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数据库管理工具，用于连接MySQL数据库并提供各个模型的管理器
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使用方法:
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- 调用 get_db_manager() 获取数据库管理器实例
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- 使用 db_manager.token_manager.xxx() 直接访问各个模型管理器的方法
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- 使用 db_manager.get_session() 可以获取一个新的数据库会话
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"""
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def __init__(self, host: str, port: int, user: str, password: str, db_name: str):
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"""
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初始化数据库管理器
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Args:
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host: 数据库主机地址
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port: 数据库端口
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user: 用户名
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password: 密码
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db_name: 数据库名
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"""
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self.host = host
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self.port = port
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self.user = user
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self.password = password
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self.db_name = db_name
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self.engine = None
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self.Session = None
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# 初始化数据库连接
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self._init_db()
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# 初始化各个管理器
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self._init_managers()
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def _init_db(self) -> None:
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"""初始化数据库连接和表"""
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try:
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# 创建数据库连接
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connection_string = f"mysql+pymysql://{self.user}:{self.password}@{self.host}:{self.port}/{self.db_name}?charset=utf8mb4"
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# 创建引擎，设置连接池
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self.engine = create_engine(
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connection_string,
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echo=False, # 设置为True可以输出SQL语句（调试用）
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pool_size=5, # 连接池大小
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max_overflow=10, # 最大溢出连接数
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pool_timeout=30, # 连接超时时间
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pool_recycle=1800, # 连接回收时间（秒）
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pool_pre_ping=True, # 在使用连接前先ping一下，确保连接有效
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connect_args={'charset': 'utf8mb4'}
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)
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# 创建会话工厂
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self.Session = sessionmaker(bind=self.engine)
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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(f"成功连接到数据库 {self.db_name}")
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except Exception as e:
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logger.error(f"数据库初始化失败: {e}")
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self.engine = None
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def _init_managers(self) -> None:
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"""初始化各个模型的管理器"""
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if not self.engine:
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logger.error("引擎未初始化，无法创建管理器")
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return
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try:
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session = self.Session()
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# 初始化各个模型的管理器
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self.token_manager = TokenManager(session)
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self.analysis_result_manager = AnalysisResultManager(session)
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self.user_manager = UserManager(session)
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self.user_question_manager = UserQuestionManager(session)
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self.astock_manager = AStockManager(session)
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self.analysis_history_manager = AnalysisHistoryManager(session)
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logger.info("成功初始化所有模型管理器")
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except Exception as e:
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logger.error(f"管理器初始化失败: {e}")
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if session:
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session.close()
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def get_session(self):
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"""
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获取新的数据库会话
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Returns:
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SQLAlchemy session对象，如果初始化失败则返回None
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"""
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if not self.Session:
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try:
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self._init_db()
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except Exception as e:
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logger.error(f"重新初始化数据库失败: {e}")
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return None
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return self.Session()
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def refresh_managers(self) -> bool:
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"""
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刷新所有管理器，重新建立会话
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Returns:
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刷新是否成功
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"""
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try:
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# 关闭旧会话(如果有)
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self.close()
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# 重新初始化数据库连接
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self._init_db()
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# 重新初始化管理器
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self._init_managers()
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return self.engine is not None
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except Exception as e:
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logger.error(f"刷新管理器失败: {e}")
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return False
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def close(self) -> None:
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"""关闭数据库连接（如果存在）"""
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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")
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self.engine = None
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self.Session = None
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# 单例模式
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_db_instance = None
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def get_db_manager(host: Optional[str] = None,
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port: Optional[int] = None,
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user: Optional[str] = None,
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password: Optional[str] = None,
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db_name: Optional[str] = None) -> DBManager:
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"""
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获取数据库管理器实例（单例模式）
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Args:
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host: 数据库主机地址
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port: 数据库端口
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user: 用户名
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password: 密码
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db_name: 数据库名
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Returns:
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数据库管理器实例
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使用示例:
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```python
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# 获取数据库管理器
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db_manager = get_db_manager()
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# 使用Token管理器
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tokens = db_manager.token_manager.search_token("BTC")
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# 使用用户管理器
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user = db_manager.user_manager.get_user_by_mail("example@test.com")
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```
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"""
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global _db_instance
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# 如果已经初始化过，直接返回
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if _db_instance is not None:
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return _db_instance
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# 如果未指定参数，从配置加载器获取数据库配置
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if host is None or port is None or user is None or password is None or db_name is None:
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config_loader = ConfigLoader()
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db_config = config_loader.get_database_config()
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# 使用配置中的值或默认值
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db_host = host or db_config.get('host')
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db_port = port or db_config.get('port')
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db_user = user or db_config.get('user')
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db_password = password or db_config.get('password')
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db_name = db_name or db_config.get('db_name')
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logger.info(f"从配置加载数据库连接信息: {db_host}:{db_port}/{db_name}")
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else:
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db_host = host
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db_port = port
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db_user = user
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db_password = password
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db_name = db_name
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# 创建实例
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_db_instance = DBManager(
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host=db_host,
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port=db_port,
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user=db_user,
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password=db_password,
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db_name=db_name
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)
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return _db_instance |