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Improve the send queue code a bit

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mathieui 2019-08-23 10:57:20 +02:00
parent d97efa0bd8
commit 110bbf8afc
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GPG key ID: C59F84CEEFD616E3
1 changed files with 28 additions and 8 deletions
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36
slixmpp/xmlstream/xmlstream.py
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@ -12,7 +12,7 @@
:license: MIT, see LICENSE for more details
"""
from typing import Optional
from typing import Optional, Set, Callable
import functools
import logging
@ -896,10 +896,18 @@ class XMLStream(asyncio.BaseProtocol):
"""
return xml
async def continue_slow_send(self, task, already_used):
log.debug('rescheduled task: %s', task)
async def _continue_slow_send(self,
task: asyncio.Task,
already_used: Set[Callable[[ElementBase], Optional[StanzaBase]]]
) -> None:
"""
Used when an item in the send queue has taken too long to process.
This is away from the send queue and can take as much time as needed.
:param asyncio.Task task: the Task wrapping the coroutine
:param set already_used: Filters already used on this outgoing stanza
"""
data = await task
log.debug('data for rescheduled task %s : %s', task, data)
for filter in self.__filters['out']:
if filter in already_used:
continue
@ -921,10 +929,12 @@ class XMLStream(asyncio.BaseProtocol):
else:
self.send_raw(data)
async def run_filters(self):
"""
Background loop that processes stanzas to send.
"""
class ContinueQueue(Exception): pass
while True:
(data, use_filters) = await self.waiting_queue.get()
try:
@ -935,9 +945,17 @@ class XMLStream(asyncio.BaseProtocol):
already_run_filters.add(filter)
if iscoroutinefunction(filter):
task = asyncio.create_task(filter(data))
completed, pending = await wait({task}, timeout=1)
completed, pending = await wait(
{task},
timeout=1,
)
if pending:
asyncio.ensure_future(self.continue_slow_send(task, already_run_filters))
asyncio.ensure_future(
self._continue_slow_send(
task,
already_run_filters
)
)
raise Exception("Slow coro, rescheduling")
data = task.result()
else:
@ -956,8 +974,10 @@ class XMLStream(asyncio.BaseProtocol):
self.send_raw(str_data)
else:
self.send_raw(data)
except:
log.error('Could not send stanza %s', data, exc_info=True)
except ContinueQueue as exc:
log.info('Stanza in send queue not sent: %s', exc)
except Exception:
log.error('Exception raised in send queue:', exc_info=True)
self.waiting_queue.task_done()
def send(self, data, use_filters=True):