晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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import asyncio
import collections
import contextlib
import os
from logging import getLogger
from defence360agent.contracts.messages import MessageType
from defence360agent.contracts.plugins import (
MessageSink,
MessageSource,
expect,
)
from defence360agent.utils import recurring_check
logger = getLogger(__name__)
class Accumulate(MessageSink, MessageSource):
PROCESSING_ORDER = MessageSink.ProcessingOrder.POST_PROCESS_MESSAGE
DEFAULT_AGGREGATE_TIMEOUT = int(
os.environ.get("IMUNIFY360_AGGREGATE_MESSAGES_TIMEOUT", 60)
)
def __init__(self, period=DEFAULT_AGGREGATE_TIMEOUT, **kwargs):
super().__init__(**kwargs)
self._period = period
async def create_source(self, loop, sink):
self._loop = loop
self._sink = sink
self._task = loop.create_task(
recurring_check(self._period)(self._flush)()
)
self._data = collections.defaultdict(list)
async def create_sink(self, loop):
self._loop = loop
async def shutdown(self):
if self._task is not None:
self._task.cancel()
with contextlib.suppress(asyncio.CancelledError):
await self._task
@expect(MessageType.Accumulatable)
async def collect(self, message):
list_type = message.LIST_CLASS
if message.do_accumulate():
self._data[list_type].append(message)
async def _flush(self):
copy_data = self._data
self._data = collections.defaultdict(list)
for list_type, messages in copy_data.items():
try:
# FIXME: remove this try..except block after we have forbidden
# to create Accumulatable class without LIST_CLASS.
await self._sink.process_message(list_type(items=messages))
except TypeError:
logger.error("%s, %s", list_type, messages)
raise