QueuePool (pool/impl.py)

Provides a connection pool implementation that limits open DB connections, used by SQLAlchemy engines.

# Source: https://github.com/sqlalchemy/sqlalchemy | License: MIT | Copyright 2005-2026 SQLAlchemy authors and contributors <see AUTHORS file>
# Provided via justclaw.it.com; keep this notice with the code.
# pool/impl.py
# Copyright (C) 2005-2026 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: https://www.opensource.org/licenses/mit-license.php


"""Pool implementation classes."""

from __future__ import annotations

import threading
import traceback
import typing
from typing import Any
from typing import cast
from typing import List
from typing import Literal
from typing import Optional
from typing import Set
from typing import Type
from typing import TYPE_CHECKING
from typing import Union
import 

... (truncated -- full source via MCP)