97 lines
2.6 KiB
Python
97 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
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# @Author : relakkes@gmail.com
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# @Time : 2024/4/6 14:54
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# @Desc : mediacrawler db 管理
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import asyncio
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from typing import Dict
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from urllib.parse import urlparse
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import aiofiles
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import aiomysql
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import config
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from async_db import AsyncMysqlDB
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from tools import utils
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from var import db_conn_pool_var, media_crawler_db_var
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def parse_mysql_url(mysql_url) -> Dict:
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"""
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从配置文件中解析db链接url，给到aiomysql用，因为aiomysql不支持直接以URL的方式传递链接信息。
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Args:
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mysql_url: mysql://root:{RELATION_DB_PWD}@localhost:3306/media_crawler
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Returns:
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"""
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parsed_url = urlparse(mysql_url)
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db_params = {
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'host': parsed_url.hostname,
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'port': parsed_url.port or 3306,
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'user': parsed_url.username,
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'password': parsed_url.password,
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'db': parsed_url.path.lstrip('/')
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}
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return db_params
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async def init_mediacrawler_db():
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"""
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初始化数据库链接池对象，并将该对象塞给media_crawler_db_var上下文变量
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Returns:
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"""
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db_conn_params = parse_mysql_url(config.RELATION_DB_URL)
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pool = await aiomysql.create_pool(
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autocommit=True,
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**db_conn_params
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)
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async_db_obj = AsyncMysqlDB(pool)
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# 将连接池对象和封装的CRUD sql接口对象放到上下文变量中
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db_conn_pool_var.set(pool)
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media_crawler_db_var.set(async_db_obj)
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async def init_db():
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"""
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初始化db连接池
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Returns:
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"""
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utils.logger.info("[init_db] start init mediacrawler db connect object")
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await init_mediacrawler_db()
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utils.logger.info("[init_db] end init mediacrawler db connect object")
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async def close():
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"""
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关闭连接池
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Returns:
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"""
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utils.logger.info("[close] close mediacrawler db pool")
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db_pool: aiomysql.Pool = db_conn_pool_var.get()
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if db_pool is not None:
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db_pool.close()
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async def init_table_schema():
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"""
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用来初始化数据库表结构，请在第一次需要创建表结构的时候使用，多次执行该函数会将已有的表以及数据全部删除
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Returns:
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"""
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utils.logger.info("[init_table_schema] begin init mysql table schema ...")
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await init_mediacrawler_db()
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async_db_obj: AsyncMysqlDB = media_crawler_db_var.get()
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async with aiofiles.open("schema/tables.sql", mode="r", encoding="utf-8") as f:
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schema_sql = await f.read()
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await async_db_obj.execute(schema_sql)
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utils.logger.info("[init_table_schema] mediacrawler table schema init successful")
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await close()
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if __name__ == '__main__':
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asyncio.get_event_loop().run_until_complete(init_table_schema())
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