PK jLƽ11aiojobs/__init__.py"""Jobs scheduler for managing background task (asyncio). The library gives controlled way for scheduling background tasks for asyncio applications. """ __version__ = '0.2.0' import asyncio from ._scheduler import Scheduler async def create_scheduler(*, close_timeout=0.1, limit=100, pending_limit=10000, exception_handler=None): if exception_handler is not None and not callable(exception_handler): raise TypeError('A callable object or None is expected, ' 'got {!r}'.format(exception_handler)) loop = asyncio.get_event_loop() return Scheduler(loop=loop, close_timeout=close_timeout, limit=limit, pending_limit=pending_limit, exception_handler=exception_handler) __all__ = ('create_scheduler',) PK jL,ݞ((aiojobs/_job.pyimport asyncio import sys import traceback import async_timeout class Job: _source_traceback = None _closed = False _explicit = False _task = None def __init__(self, coro, scheduler, loop): self._loop = loop 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 '>'.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): 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): self._explicit = True if timeout is None: timeout = self._scheduler.close_timeout await self._close(timeout) async def _close(self, timeout): if self._closed: return 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) PK jL,@@aiojobs/_scheduler.pyimport asyncio from ._job import Job try: from collections.abc import Collection except ImportError: # pragma: no cover # Python 3.5 has no Collection ABC class from collections.abc import Sized, Iterable, Container bases = Sized, Iterable, Container else: # pragma: no cover bases = (Collection,) class Scheduler(*bases): def __init__(self, *, close_timeout, limit, pending_limit, exception_handler, loop): self._loop = loop self._jobs = set() self._close_timeout = close_timeout self._limit = limit self._exception_handler = exception_handler self._failed_tasks = asyncio.Queue(loop=loop) self._failed_task = loop.create_task(self._wait_failed()) self._pending = asyncio.Queue(maxsize=pending_limit, loop=loop) self._closed = False def __iter__(self): return iter(list(self._jobs)) def __len__(self): return len(self._jobs) def __contains__(self, job): return job in self._jobs def __repr__(self): info = [] if self._closed: info.append('closed') info = ' '.join(info) if info: info += ' ' return ''.format(info, len(self)) @property def limit(self): return self._limit @property def pending_limit(self): return self._pending.maxsize @property def close_timeout(self): return self._close_timeout @property def active_count(self): return len(self._jobs) - self._pending.qsize() @property def pending_count(self): return self._pending.qsize() @property def closed(self): return self._closed async def spawn(self, coro): # The method is not a coroutine # but let's keep it async for sake of future changes # Migration from function to coroutine is a pain if self._closed: raise RuntimeError("Scheduling a new job after closing") job = Job(coro, self, self._loop) should_start = (self._limit is None or self.active_count < self._limit) self._jobs.add(job) if should_start: job._start() else: # wait for free slot in queue await self._pending.put(job) return job async def close(self): if self._closed: return self._closed = True # prevent adding new jobs jobs = self._jobs if jobs: # cleanup pending queue # all job will be started on closing while not self._pending.empty(): self._pending.get_nowait() await asyncio.gather( *[job._close(self._close_timeout) for job in jobs], loop=self._loop, return_exceptions=True) self._jobs.clear() self._failed_tasks.put_nowait(None) await self._failed_task def call_exception_handler(self, context): handler = self._exception_handler if handler is None: handler = self._loop.call_exception_handler(context) else: handler(self, context) @property def exception_handler(self): return self._exception_handler def _done(self, job): self._jobs.discard(job) if not self.pending_count: return # No pending jobs when limit is None # Safe to subtract. ntodo = self._limit - self.active_count i = 0 while i < ntodo: if not self.pending_count: return new_job = self._pending.get_nowait() if new_job.closed: continue new_job._start() i += 1 async def _wait_failed(self): # a coroutine for waiting failed tasks # without awaiting for failed tasks async raises a warning while True: task = await self._failed_tasks.get() if task is None: return # closing try: await task # should raise exception except Exception as exc: # Cleanup a warning # self.call_exception_handler() is already called # by Job._add_done_callback # Thus we caught an task exception and we are good citizens pass PK jLJ.||aiojobs/aiohttp.pyfrom functools import wraps from aiohttp.web import View from . import create_scheduler __all__ = ('setup', 'spawn', 'get_scheduler', 'get_scheduler_from_app', 'atomic') def get_scheduler(request): scheduler = get_scheduler_from_app(request.app) if scheduler is None: raise RuntimeError( "Call aiojobs.aiohttp.setup() on application initialization") return scheduler def get_scheduler_from_app(app): return app.get('AIOJOBS_SCHEDULER') async def spawn(request, coro): return await get_scheduler(request).spawn(coro) def atomic(coro): @wraps(coro) async def wrapper(request): if isinstance(request, View): # Class Based View decorated. request = request.request job = await spawn(request, coro(request)) return await job.wait() return wrapper def setup(app, **kwargs): async def on_startup(app): app['AIOJOBS_SCHEDULER'] = await create_scheduler(**kwargs) async def on_cleanup(app): await app['AIOJOBS_SCHEDULER'].close() app.on_startup.append(on_startup) app.on_cleanup.append(on_cleanup) PK jL;U],],aiojobs-0.2.0.dist-info/LICENSE Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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PK!HxQPaiojobs-0.2.0.dist-info/WHEEL1 0 RZq+D-Dv;_[*7Fp 8MRq%_:==ߘPT PK!H2f aiojobs-0.2.0.dist-info/METADATARMS0WQ-3:VG~v)&߻DInI{o0~#cV)$hR@?F{n{)ѬSgl1d` HTX UEeW%8 8BVIt% V0wiS 7Ӥвæq->)x>2ڤ %Z/w1I5}&v ^U5ԏ C6~Z3'gM֊ .s4I>i^RY/zVhڒhIn$)CmPB v:TTɥ3_ Rs[[CYi#9OFW̑!sāmj8?E7>_Am ۬f>/PK!H8cRaiojobs-0.2.0.dist-info/RECORDu̻0@~CHP KI(Q|a9Ѧnňu½gビ<^aٴVk6/S0WߘNgP( ex?Q(EiݾkPæeˊ`Cno<~yZ$j K@l ?mUeZE|k3zy 9u1j -F@5JFHazoEz94߾;nkM Y>q}NpISB׺*!yXVMNR3>&hw؞I;nry,DvZ!}4ۡn,Ӽ#|]\qT~Bs$@p |PK jLƽ11aiojobs/__init__.pyPK jL,ݞ((baiojobs/_job.pyPK jL,@@aiojobs/_scheduler.pyPK jLJ.||*%aiojobs/aiohttp.pyPK jL;U],],)aiojobs-0.2.0.dist-info/LICENSEPK!HxQPpVaiojobs-0.2.0.dist-info/WHEELPK!H2f Vaiojobs-0.2.0.dist-info/METADATAPK!H8cRXaiojobs-0.2.0.dist-info/RECORDPK3^Z