mirror of
https://github.com/PiBrewing/craftbeerpi4.git
synced 2024-11-25 08:28:23 +01:00
137 lines
No EOL
4.2 KiB
Python
137 lines
No EOL
4.2 KiB
Python
import asyncio
|
|
import sys
|
|
import traceback
|
|
|
|
import async_timeout
|
|
import time
|
|
|
|
|
|
class Job:
|
|
_source_traceback = None
|
|
_closed = False
|
|
_explicit = False
|
|
_task = None
|
|
|
|
def __init__(self, coro, name, type, scheduler, loop):
|
|
self._loop = loop
|
|
self.name = name
|
|
self.type = type
|
|
self.start_time = time.time()
|
|
self._coro = coro
|
|
self._scheduler = scheduler
|
|
self._started = loop.create_future()
|
|
|
|
if loop.get_debug():
|
|
self._source_traceback = traceback.extract_stack(sys._getframe(2))
|
|
|
|
def __repr__(self):
|
|
info = []
|
|
if self._closed:
|
|
info.append('closed')
|
|
elif self._task is None:
|
|
info.append('pending')
|
|
info = ' '.join(info)
|
|
if info:
|
|
info += ' '
|
|
return '<Job {}coro=<{}>>'.format(info, self._coro)
|
|
|
|
@property
|
|
def active(self):
|
|
return not self.closed and not self.pending
|
|
|
|
@property
|
|
def pending(self):
|
|
return self._task is None and not self.closed
|
|
|
|
@property
|
|
def closed(self):
|
|
return self._closed
|
|
|
|
async def _do_wait(self, timeout):
|
|
with async_timeout.timeout(timeout=timeout, loop=self._loop):
|
|
# TODO: add a test for waiting for a pending coro
|
|
await self._started
|
|
return await self._task
|
|
|
|
async def wait(self, *, timeout=None):
|
|
if self._closed:
|
|
return
|
|
self._explicit = True
|
|
scheduler = self._scheduler
|
|
try:
|
|
return await asyncio.shield(self._do_wait(timeout),
|
|
loop=self._loop)
|
|
except asyncio.CancelledError:
|
|
# Don't stop inner coroutine on explicit cancel
|
|
raise
|
|
except Exception:
|
|
await self._close(scheduler.close_timeout)
|
|
raise
|
|
|
|
async def close(self, *, timeout=None):
|
|
if self._closed:
|
|
return
|
|
self._explicit = True
|
|
if timeout is None:
|
|
timeout = self._scheduler.close_timeout
|
|
await self._close(timeout)
|
|
|
|
async def _close(self, timeout):
|
|
self._closed = True
|
|
if self._task is None:
|
|
# the task is closed immediately without actual execution
|
|
# it prevents a warning like
|
|
# RuntimeWarning: coroutine 'coro' was never awaited
|
|
self._start()
|
|
if not self._task.done():
|
|
self._task.cancel()
|
|
# self._scheduler is None after _done_callback()
|
|
scheduler = self._scheduler
|
|
try:
|
|
with async_timeout.timeout(timeout=timeout,
|
|
loop=self._loop):
|
|
await self._task
|
|
except asyncio.CancelledError:
|
|
pass
|
|
except asyncio.TimeoutError as exc:
|
|
if self._explicit:
|
|
raise
|
|
context = {'message': "Job closing timed out",
|
|
'job': self,
|
|
'exception': exc}
|
|
if self._source_traceback is not None:
|
|
context['source_traceback'] = self._source_traceback
|
|
scheduler.call_exception_handler(context)
|
|
except Exception as exc:
|
|
if self._explicit:
|
|
raise
|
|
self._report_exception(exc)
|
|
|
|
def _start(self):
|
|
assert self._task is None
|
|
self._task = self._loop.create_task(self._coro)
|
|
self._task.add_done_callback(self._done_callback)
|
|
self._started.set_result(None)
|
|
|
|
def _done_callback(self, task):
|
|
|
|
scheduler = self._scheduler
|
|
scheduler._done(self)
|
|
try:
|
|
exc = task.exception()
|
|
except asyncio.CancelledError:
|
|
pass
|
|
else:
|
|
if exc is not None and not self._explicit:
|
|
self._report_exception(exc)
|
|
scheduler._failed_tasks.put_nowait(task)
|
|
self._scheduler = None # drop backref
|
|
self._closed = True
|
|
|
|
def _report_exception(self, exc):
|
|
context = {'message': "Job processing failed",
|
|
'job': self,
|
|
'exception': exc}
|
|
if self._source_traceback is not None:
|
|
context['source_traceback'] = self._source_traceback
|
|
self._scheduler.call_exception_handler(context) |