support clean exit

This commit is contained in:
Lex Berezhny 2020-08-20 10:43:44 -04:00
parent 4dfbdcc2d7
commit c1803434aa
11 changed files with 76 additions and 35 deletions

View file

@ -51,7 +51,7 @@ class BlockchainDB:
self.executor: Optional[ThreadPoolExecutor] = None
async def run_in_executor(self, *args):
return await asyncio.get_event_loop().run_in_executor(self.executor, *args)
return await asyncio.get_running_loop().run_in_executor(self.executor, *args)
def sync_open(self):
self.connection = sqlite3.connect(

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@ -179,10 +179,11 @@ class Lbrycrd:
async def close(self):
await self.db.close()
await self.session.close()
if self.session is not None:
await self.session.close()
async def start(self, *args):
loop = asyncio.get_event_loop()
loop = asyncio.get_running_loop()
command = self.get_start_command(*args)
log.info(' '.join(command))
self.transport, self.protocol = await loop.subprocess_exec(Process, *command)

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@ -141,7 +141,7 @@ class Database:
db.execute(text(f"CREATE DATABASE {name}"))
async def create(self, name):
return await asyncio.get_event_loop().run_in_executor(None, self.sync_create, name)
return await asyncio.get_running_loop().run_in_executor(None, self.sync_create, name)
def sync_drop(self, name):
engine = create_engine(self.url)
@ -150,7 +150,7 @@ class Database:
db.execute(text(f"DROP DATABASE IF EXISTS {name}"))
async def drop(self, name):
return await asyncio.get_event_loop().run_in_executor(None, self.sync_drop, name)
return await asyncio.get_running_loop().run_in_executor(None, self.sync_drop, name)
async def open(self):
assert self.executor is None, "Database already open."
@ -175,11 +175,17 @@ class Database:
await self.run(uninitialize)
self.executor.shutdown()
self.executor = None
# fixes "OSError: handle is closed"
# seems to only happen when running in PyCharm
# https://github.com/python/cpython/pull/6084#issuecomment-564585446
# TODO: delete this in Python 3.8/3.9?
from concurrent.futures.process import _threads_wakeups
_threads_wakeups.clear()
async def run(self, func, *args, **kwargs):
if kwargs:
clean_wallet_account_ids(kwargs)
return await asyncio.get_event_loop().run_in_executor(
return await asyncio.get_running_loop().run_in_executor(
self.executor, partial(func, *args, **kwargs)
)

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@ -149,7 +149,7 @@ class EventStream:
@property
def first(self) -> asyncio.Future:
future = asyncio.get_event_loop().create_future()
future = asyncio.get_running_loop().create_future()
subscription = self.listen(
lambda value: not future.done() and self._cancel_and_callback(subscription, future, value),
lambda exception: not future.done() and self._cancel_and_error(subscription, future, exception)
@ -158,7 +158,7 @@ class EventStream:
@property
def last(self) -> asyncio.Future:
future = asyncio.get_event_loop().create_future()
future = asyncio.get_running_loop().create_future()
value = None
def update_value(_value):
@ -237,7 +237,8 @@ class EventQueuePublisher(threading.Thread):
def stop(self):
self.queue.put(self.STOP)
self.join()
if self.is_alive():
self.join()
def __enter__(self):
self.start()

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@ -54,11 +54,11 @@ class VideoFileAnalyzer:
# We work around that issue here by using run_in_executor. Check it again in Python 3.8.
async def _execute_ffmpeg(self, arguments):
arguments = self._which_ffmpeg + " " + arguments
return await asyncio.get_event_loop().run_in_executor(None, self._execute, arguments, self._env_copy)
return await asyncio.get_running_loop().run_in_executor(None, self._execute, arguments, self._env_copy)
async def _execute_ffprobe(self, arguments):
arguments = self._which_ffprobe + " " + arguments
return await asyncio.get_event_loop().run_in_executor(None, self._execute, arguments, self._env_copy)
return await asyncio.get_running_loop().run_in_executor(None, self._execute, arguments, self._env_copy)
async def _verify_executables(self):
try:

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@ -2922,7 +2922,7 @@ class API:
"""
blob = await download_blob(asyncio.get_event_loop(), self.conf, self.blob_manager, self.dht_node, blob_hash)
blob = await download_blob(asyncio.get_running_loop(), self.conf, self.blob_manager, self.dht_node, blob_hash)
if read:
with blob.reader_context() as handle:
return handle.read().decode()

View file

@ -1,9 +1,11 @@
import json
import signal
import asyncio
import logging
import signal
from weakref import WeakSet
from aiohttp.web import GracefulExit
from asyncio.runners import _cancel_all_tasks
from aiohttp.web import Application, AppRunner, WebSocketResponse, TCPSite, Response
from aiohttp.http_websocket import WSMsgType, WSCloseCode
@ -13,6 +15,9 @@ from lbry.service.api import API
from lbry.console import Console
log = logging.getLogger(__name__)
def jsonrpc_dumps_pretty(obj, **kwargs):
#if not isinstance(obj, dict):
# data = {"jsonrpc": "2.0", "error": obj.to_dict()}
@ -84,28 +89,21 @@ class Daemon:
self.runner = AppRunner(self.app)
def run(self):
loop = asyncio.get_event_loop()
def graceful_exit():
raise GracefulExit()
try:
loop.add_signal_handler(signal.SIGINT, graceful_exit)
loop.add_signal_handler(signal.SIGTERM, graceful_exit)
except NotImplementedError:
pass # Not implemented on Windows
loop = asyncio.new_event_loop()
for sig in (signal.SIGHUP, signal.SIGTERM, signal.SIGINT):
loop.add_signal_handler(sig, loop.stop)
try:
loop.run_until_complete(self.start())
loop.run_forever()
except (GracefulExit, KeyboardInterrupt, asyncio.CancelledError):
pass
finally:
loop.run_until_complete(self.stop())
logging.shutdown()
if hasattr(loop, 'shutdown_asyncgens'):
loop.run_until_complete(loop.shutdown_asyncgens())
try:
loop.run_until_complete(self.stop())
finally:
try:
_cancel_all_tasks(loop)
loop.run_until_complete(loop.shutdown_asyncgens())
finally:
loop.close()
async def start(self):
self.console.starting()

View file

@ -1,10 +1,10 @@
from asyncio import Event, get_event_loop
from asyncio import Event, get_running_loop
class TaskGroup:
def __init__(self, loop=None):
self._loop = loop or get_event_loop()
self._loop = loop or get_running_loop()
self._tasks = set()
self.done = Event()
self.started = Event()

View file

@ -478,7 +478,7 @@ class Account:
continue
if "-----BEGIN EC PRIVATE KEY-----" not in private_key_pem:
continue
public_key_der = await asyncio.get_event_loop().run_in_executor(None, to_der, private_key_pem)
public_key_der = await asyncio.get_running_loop().run_in_executor(None, to_der, private_key_pem)
channel_keys[self.ledger.public_key_to_address(public_key_der)] = private_key_pem
if self.channel_keys != channel_keys:
self.channel_keys = channel_keys

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View file

@ -0,0 +1,35 @@
import os
import time
import asyncio
import signal
from threading import Thread
from unittest import TestCase
from lbry import Daemon, FullNode
from lbry.console import Console
from lbry.blockchain.lbrycrd import Lbrycrd
class TestShutdown(TestCase):
def test_graceful_fail(self):
chain_loop = asyncio.new_event_loop()
asyncio.set_event_loop(chain_loop)
chain = Lbrycrd.temp_regtest()
self.addCleanup(lambda: chain_loop.run_until_complete(chain.stop()))
self.addCleanup(lambda: asyncio.set_event_loop(chain_loop))
chain_loop.run_until_complete(chain.ensure())
chain_loop.run_until_complete(chain.start())
chain_loop.run_until_complete(chain.generate(1))
chain.ledger.conf.set(workers=2)
service = FullNode(chain.ledger)
daemon = Daemon(service, Console(service))
def send_signal():
time.sleep(2)
os.kill(os.getpid(), signal.SIGTERM)
thread = Thread(target=send_signal)
thread.start()
daemon.run()