Revert "feat: add cache_sync module for cross-process cache invalidation"
This reverts commit 2d830a7b5c7e0c04a72ed9b2848ce6c10f0701a1.
This commit is contained in:
parent
2d830a7b5c
commit
9554e2a791
@ -1,243 +0,0 @@
|
||||
"""
|
||||
跨进程缓存同步模块 — Redis Pub/Sub 触发 + 本地进程缓存
|
||||
|
||||
每个 Sage 进程维护自己的本地缓存（零延迟读取），
|
||||
当某个进程执行数据变更后，通过 Redis Pub/Sub 广播失效消息，
|
||||
所有进程收到后清除对应本地缓存。
|
||||
|
||||
使用方式:
|
||||
# 1. 在进程初始化时启动
|
||||
from ahserver.cache_sync import get_cache_sync
|
||||
cache_sync = get_cache_sync()
|
||||
await cache_sync.start(redis_url)
|
||||
cache_sync.register("llm", callback=reload_llm_data)
|
||||
|
||||
# 2. 在执行 C/U/D 操作后发送失效
|
||||
await cache_sync.invalidate("llm")
|
||||
|
||||
# 3. 读取时检查缓存
|
||||
if cache_sync.has("llm"):
|
||||
return cache_sync.get("llm")
|
||||
data = await load_from_db()
|
||||
cache_sync.set("llm", data)
|
||||
"""
|
||||
|
||||
import asyncio
|
||||
import json
|
||||
import time
|
||||
import uuid
|
||||
from appPublic.log import debug, exception
|
||||
|
||||
|
||||
class CacheSync:
|
||||
"""跨进程缓存同步 — Redis Pub/Sub 触发 + 本地缓存"""
|
||||
|
||||
CHANNEL_PREFIX = "sage:cache:invalidate"
|
||||
|
||||
def __init__(self):
|
||||
self._redis = None
|
||||
self._pubsub_task = None
|
||||
self._running = False
|
||||
self._pid = str(uuid.uuid4())[:8]
|
||||
|
||||
# 本地缓存: {table_name: {"data": ..., "version": ..., "ts": ...}}
|
||||
self._local_cache = {}
|
||||
|
||||
# 失效回调: {table_name: [callback, ...]}
|
||||
self._callbacks = {}
|
||||
|
||||
async def start(self, redis_url: str):
|
||||
"""启动订阅 — 在进程初始化时调用
|
||||
|
||||
Args:
|
||||
redis_url: Redis 连接 URL，如 "redis://127.0.0.1:6379"
|
||||
"""
|
||||
if self._running:
|
||||
debug("CacheSync already running")
|
||||
return
|
||||
|
||||
import redis.asyncio as aioredis
|
||||
self._redis = aioredis.from_url(
|
||||
redis_url,
|
||||
decode_responses=True,
|
||||
socket_keepalive=True,
|
||||
)
|
||||
self._running = True
|
||||
self._pubsub_task = asyncio.create_task(self._listener())
|
||||
debug(f"CacheSync started [pid={self._pid}]")
|
||||
|
||||
async def stop(self):
|
||||
"""停止订阅 — 进程退出时调用"""
|
||||
self._running = False
|
||||
if self._pubsub_task:
|
||||
self._pubsub_task.cancel()
|
||||
try:
|
||||
await self._pubsub_task
|
||||
except asyncio.CancelledError:
|
||||
pass
|
||||
if self._redis:
|
||||
await self._redis.close()
|
||||
self._redis = None
|
||||
debug(f"CacheSync stopped [pid={self._pid}]")
|
||||
|
||||
async def _listener(self):
|
||||
"""后台订阅协程 — 持续监听失效消息"""
|
||||
pubsub = self._redis.pubsub()
|
||||
try:
|
||||
await pubsub.subscribe(self.CHANNEL_PREFIX)
|
||||
debug(f"CacheSync [pid={self._pid}] subscribed to {self.CHANNEL_PREFIX}")
|
||||
async for message in pubsub.listen():
|
||||
if message["type"] == "message":
|
||||
try:
|
||||
data = json.loads(message["data"])
|
||||
table = data.get("table")
|
||||
version = data.get("version", 0)
|
||||
sender_pid = data.get("pid", "?")
|
||||
if table:
|
||||
await self._on_invalidate(table, version, sender_pid)
|
||||
except Exception as e:
|
||||
exception(f"CacheSync: failed to parse message: {e}")
|
||||
except asyncio.CancelledError:
|
||||
pass
|
||||
except Exception as e:
|
||||
exception(f"CacheSync listener error: {e}")
|
||||
finally:
|
||||
try:
|
||||
await pubsub.unsubscribe(self.CHANNEL_PREFIX)
|
||||
await pubsub.close()
|
||||
except Exception:
|
||||
pass
|
||||
|
||||
async def _on_invalidate(self, table: str, version: float, sender_pid: str = "?"):
|
||||
"""收到失效消息后的处理
|
||||
|
||||
只清除比消息版本更新的本地缓存（避免误清旧消息）。
|
||||
"""
|
||||
if table not in self._local_cache:
|
||||
return
|
||||
|
||||
cached = self._local_cache[table]
|
||||
if version >= cached.get("version", 0):
|
||||
debug(f"CacheSync [pid={self._pid}] invalidating table={table} (from pid={sender_pid})")
|
||||
self._local_cache.pop(table, None)
|
||||
|
||||
# 调用注册的失效回调
|
||||
if table in self._callbacks:
|
||||
for cb in self._callbacks[table]:
|
||||
try:
|
||||
if asyncio.iscoroutinefunction(cb):
|
||||
await cb()
|
||||
else:
|
||||
cb()
|
||||
except Exception as e:
|
||||
exception(f"CacheSync callback error for table={table}: {e}")
|
||||
|
||||
async def invalidate(self, table: str, version: float = None):
|
||||
"""发送失效消息 — 在执行 C/U/D 操作后调用
|
||||
|
||||
同时清除自己的本地缓存并触发回调。
|
||||
"""
|
||||
msg_version = version or time.time()
|
||||
msg = json.dumps({
|
||||
"table": table,
|
||||
"version": msg_version,
|
||||
"pid": self._pid,
|
||||
})
|
||||
try:
|
||||
await self._redis.publish(self.CHANNEL_PREFIX, msg)
|
||||
debug(f"CacheSync [pid={self._pid}] published invalidate: table={table}")
|
||||
except Exception as e:
|
||||
exception(f"CacheSync publish error: {e}")
|
||||
|
||||
# 同时清除自己的本地缓存
|
||||
await self._on_invalidate(table, msg_version, sender_pid=self._pid)
|
||||
|
||||
def get(self, table: str):
|
||||
"""获取本地缓存数据"""
|
||||
entry = self._local_cache.get(table)
|
||||
if entry is None:
|
||||
return None
|
||||
return entry["data"]
|
||||
|
||||
def set(self, table: str, data, ttl: int = 300):
|
||||
"""设置本地缓存
|
||||
|
||||
Args:
|
||||
table: 缓存标识（通常用表名）
|
||||
data: 缓存数据
|
||||
ttl: 最大缓存时间（秒），超过此时间自动失效（兜底机制）
|
||||
"""
|
||||
self._local_cache[table] = {
|
||||
"data": data,
|
||||
"version": time.time(),
|
||||
"ts": time.time(),
|
||||
"ttl": ttl,
|
||||
}
|
||||
|
||||
def has(self, table: str, max_age: int = 300) -> bool:
|
||||
"""检查缓存是否有效（存在且未过期）
|
||||
|
||||
Args:
|
||||
table: 缓存标识
|
||||
max_age: 最大允许年龄（秒），超过视为过期
|
||||
|
||||
Returns:
|
||||
True 如果缓存有效
|
||||
"""
|
||||
entry = self._local_cache.get(table)
|
||||
if entry is None:
|
||||
return False
|
||||
if time.time() - entry["ts"] > max_age:
|
||||
self._local_cache.pop(table, None)
|
||||
return False
|
||||
return True
|
||||
|
||||
def clear(self, table: str = None):
|
||||
"""清除指定或全部本地缓存（不发送 Pub/Sub 消息）"""
|
||||
if table:
|
||||
self._local_cache.pop(table, None)
|
||||
else:
|
||||
self._local_cache.clear()
|
||||
|
||||
def register(self, table: str, callback):
|
||||
"""注册失效回调 — 收到失效消息时自动触发
|
||||
|
||||
Args:
|
||||
table: 缓存标识
|
||||
callback: 回调函数（可以是普通函数或 async 函数）
|
||||
"""
|
||||
if table not in self._callbacks:
|
||||
self._callbacks[table] = []
|
||||
self._callbacks[table].append(callback)
|
||||
|
||||
def unregister(self, table: str, callback=None):
|
||||
"""注销失效回调"""
|
||||
if table in self._callbacks:
|
||||
if callback:
|
||||
self._callbacks[table] = [
|
||||
cb for cb in self._callbacks[table] if cb != callback
|
||||
]
|
||||
else:
|
||||
self._callbacks.pop(table, None)
|
||||
|
||||
@property
|
||||
def is_running(self) -> bool:
|
||||
return self._running
|
||||
|
||||
|
||||
# 全局单例
|
||||
_cache_sync_instance = None
|
||||
|
||||
|
||||
def get_cache_sync() -> CacheSync:
|
||||
"""获取全局 CacheSync 单例"""
|
||||
global _cache_sync_instance
|
||||
if _cache_sync_instance is None:
|
||||
_cache_sync_instance = CacheSync()
|
||||
return _cache_sync_instance
|
||||
|
||||
|
||||
def reset_cache_sync():
|
||||
"""重置单例（主要用于测试）"""
|
||||
global _cache_sync_instance
|
||||
_cache_sync_instance = None
|
||||
Loading…
x
Reference in New Issue
Block a user