Source code for fennel.client.aio.results

from typing import Any, Dict

from fennel.client.aio.actions import result
from fennel.client.aio.state import get_status
from fennel.exceptions import ResultsDisabled, TaskFailed
from fennel.job import Job
from fennel.utils import EMPTY

[docs]class AsyncResult: def __init__(self, job: Job, app): """ A handle for a task that is being processed by workers via the task queue. Conceptually similar to the AsyncResult from the mutliprocessing library. """ self.job = job = app self._result: Dict = None
[docs] async def status(self): """ Return the status of the task execution. Examples -------- >>> @app.task >>> async def bar(x) ... await asyncio.sleep(x) ... return x ... >>> x = await bar.delay(5) >>> await x.status() SENT >>> await x.status() # After roughly 5 seconds... SUCCESS """ return await get_status(, self.job.uuid)
[docs] async def get(self, timeout: int = EMPTY) -> Any: """ Wait for the result to become available and return it. Raises ------ :exc:`fennel.exceptions.TaskFailed` If the original function raised an exception. :exc:`fennel.exceptions.Timeout` If > `timeout` seconds elapse before a result is available. Examples -------- >>> @app.task(retries=0) >>> def foo(x): ... return x ... >>> x = await foo.delay(7) >>> await x.get() # Wait for the result. 7 Warning ------- You must have results storage enabled (:attr:`fennel.settings.Settings.results_enabled`) If you have retries enabled, they may be rescheduled many times, so you may prefer to use retries=0 for tasks whose result you intend to wait for. """ if not raise ResultsDisabled if timeout is EMPTY: timeout = if self._result is None: self._result = await result(, self.job, timeout) # Raises Timeout exc, val = self._result["exception"], self._result["return_value"] if exc: raise TaskFailed(**exc) else: return val
def __repr__(self) -> str: return f"AsyncResult(uuid={self.job.uuid})"