73 lines
2.4 KiB
Python
73 lines
2.4 KiB
Python
"""四库统一注册表：异步生命周期编排。
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启动：逐库 init，失败按指数退避重试；DB_STRICT_STARTUP=true 时重试耗尽直接抛错阻止启动。
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关闭：逆序 dispose。健康：check_ready_detail 返回带耗时明细，供 /health 与监控面板使用。
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"""
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import asyncio
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import logging
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import time
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from . import milvus, mysql, neo4j, redis
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from config.settings import settings
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logger = logging.getLogger("config.database")
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# 关闭顺序与设计一致：mysql → redis → neo4j → milvus
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_DB_MODULES = (mysql, redis, neo4j, milvus)
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def _name(m) -> str:
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return m.__name__.rsplit(".", 1)[-1]
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async def _init_with_retry(m, strict: bool) -> bool:
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name = _name(m)
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retries = settings.db.conn_retries
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for attempt in range(retries):
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try:
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await m.init_db()
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return True
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except Exception as e:
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logger.warning(
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"[%s] init failed (attempt %d/%d): %s: %s",
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name, attempt + 1, retries, type(e).__name__, e,
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)
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if attempt < retries - 1:
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await asyncio.sleep(settings.db.retry_backoff_sec * (2**attempt))
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if strict:
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raise RuntimeError(f"[{name}] 初始化失败（{retries} 次尝试后）")
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return False
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async def init_db() -> None:
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"""手动预热（应用启动不自动调用，会话懒创建）：asyncio.run(database.init_db())"""
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for m in _DB_MODULES:
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await _init_with_retry(m, settings.db.strict_startup)
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async def dispose() -> None:
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for m in _DB_MODULES:
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try:
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await m.dispose()
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except Exception as e:
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logger.warning("[%s] dispose failed: %s: %s", _name(m), type(e).__name__, e)
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async def check_ready_detail() -> dict[str, dict]:
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"""含耗时明细：{db: {status, ms}}。任一失败不影响其它库探测。"""
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out: dict[str, dict] = {}
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for m in _DB_MODULES:
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name = _name(m)
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t0 = time.perf_counter()
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try:
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await m.check_health()
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status = "ok"
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except Exception as e:
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status = f"down: {type(e).__name__}"
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out[name] = {"status": status, "ms": round((time.perf_counter() - t0) * 1000, 1)}
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return out
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async def check_ready() -> dict[str, str]:
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"""兼容旧契约：{db: status_str}。"""
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return {k: v["status"] for k, v in (await check_ready_detail()).items()} |