BBIT-Kai
69 lines
1.9 KiB
Python
69 lines
1.9 KiB
Python
import logging
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import time
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from contextlib import contextmanager
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from typing import Optional
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import psycopg
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from psycopg_pool import ConnectionPool
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logger = logging.getLogger("PGPool")
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logger.setLevel(logging.INFO)
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class PGPool:
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"""
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PostgreSQL 连接池封装
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"""
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def __init__(
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self,
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uri: str,
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min_size: int = 1,
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max_size: int = 20,
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max_idle: int = 30,
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max_lifetime: int = 300,
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timeout: int = 10,
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check: bool = False,
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):
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"""
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:param uri: PostgreSQL 连接 URI
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"""
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self.uri = uri
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self.pool = ConnectionPool(
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self.uri,
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min_size=min_size,
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max_size=max_size,
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max_idle=max_idle,
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max_lifetime=max_lifetime,
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timeout=timeout,
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check=check,
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)
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@contextmanager
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def getConn(self, retries: int = 2, delay: float = 1.0):
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"""
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获取数据库连接，带重试机制，自动健康检查。
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使用方式：
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with pg_pool.get_conn() as conn:
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with conn.cursor() as cur:
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cur.execute(...)
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"""
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attempt = 0
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while attempt <= retries:
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try:
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with self.pool.connection() as conn:
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conn.autocommit = True
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yield conn
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return
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except psycopg.OperationalError as e:
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logger.warning(f"数据库连接异常: {e}. 尝试重试 ({attempt+1}/{retries})")
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self.pool.check() # 丢掉坏连接，重新建
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attempt += 1
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time.sleep(delay)
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except Exception as e:
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logger.error(f"SQL执行异常: {e}")
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raise
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raise psycopg.OperationalError("无法获取数据库连接，多次重试失败")
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pg_pool = PGPool(
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uri="postgresql://postgres:123456@10.10.10.9/ktor2",
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min_size=1,
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max_size=20,
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) |