From 8b7bccc4adcaa712caa8b834024fe7e0e574d03a Mon Sep 17 00:00:00 2001
From: Eric <xplzv@126.com>
Date: Fri, 10 Feb 2023 14:21:24 +0800
Subject: [PATCH] =?UTF-8?q?perf:=20=E4=BD=BF=E7=94=A8=20asyncio=20?=
 =?UTF-8?q?=E5=BB=B6=E8=BF=9F=E5=B9=B6=E5=8F=91=E6=89=A7=E8=A1=8C?=
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---
 apps/common/decorators.py | 65 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 63 insertions(+), 2 deletions(-)

diff --git a/apps/common/decorators.py b/apps/common/decorators.py
index 04e27219b..8dc6ed4de 100644
--- a/apps/common/decorators.py
+++ b/apps/common/decorators.py
@@ -1,7 +1,9 @@
 # -*- coding: utf-8 -*-
 #
+import asyncio
 import functools
 import inspect
+import threading
 import time
 import uuid
 from concurrent.futures import ThreadPoolExecutor
@@ -65,7 +67,50 @@ def _run_func_if_is_last(ttl, suffix_key, org, func, *args, **kwargs):
         logger.error('delay run error: %s' % e)
 
 
-executor = ThreadPoolExecutor(10)
+class LoopThread(threading.Thread):
+    def __init__(self, loop, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.loop = loop
+
+    def run(self) -> None:
+        asyncio.set_event_loop(loop)
+        self.loop.run_forever()
+        print('loop stopped')
+
+
+loop = asyncio.get_event_loop()
+loop_thread = LoopThread(loop)
+loop_thread.daemon = True
+loop_thread.start()
+executor = ThreadPoolExecutor(max_workers=5, thread_name_prefix='debouncer')
+
+
+class Debouncer(object):
+    def __init__(self, callback, check, delay, *args, **kwargs):
+        self.callback = callback
+        self.check = check
+        self.delay = delay
+
+    async def __call__(self, *args, **kwargs):
+        await asyncio.sleep(self.delay)
+        ok = await self._check(*args, **kwargs)
+        if ok:
+            await loop.run_in_executor(executor, self.callback, *args)
+
+    async def _check(self, *args, **kwargs):
+        if asyncio.iscoroutinefunction(self.check):
+            return await self.check(*args, **kwargs)
+        return await loop.run_in_executor(executor, self.check)
+
+
+def _run_func_with_org(org, func, *args, **kwargs):
+    from orgs.utils import set_current_org
+
+    try:
+        set_current_org(org)
+        func(*args, **kwargs)
+    except Exception as e:
+        logger.error('delay run error: %s' % e)
 
 
 def delay_run(ttl=5, key=None):
@@ -81,7 +126,23 @@ def delay_run(ttl=5, key=None):
         def wrapper(*args, **kwargs):
             from orgs.utils import get_current_org
             org = get_current_org()
-            executor.submit(_run_func_if_is_last, ttl, key, org, func, *args, **kwargs)
+            suffix_key_func = key if key else default_suffix_key
+            uid = uuid.uuid4().__str__()
+            func_name = f'{func.__module__}_{func.__name__}'
+            key_suffix = suffix_key_func(*args, **kwargs)
+            cache_key = f'DELAY_RUN_{func_name}_{key_suffix}'
+            # 延迟两倍时间，防止缓存过期，导致校验失败
+            cache.set(cache_key, uid, ttl * 2)
+
+            def _check_func(key_id, key_value):
+                ret = cache.get(key_id, None)
+                return key_value == ret
+
+            check_func_partial = functools.partial(_check_func, cache_key, uid)
+            run_func_partial = functools.partial(_run_func_with_org, org, func)
+            asyncio.run_coroutine_threadsafe(
+                Debouncer(run_func_partial, check_func_partial, ttl)(*args, **kwargs),
+                loop=loop)
 
         return wrapper