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from __future__ import annotations
from uuid import UUID
class TaskLookupError(LookupError):
"""Raised by a data store when it cannot find the requested task."""
def __init__(self, task_id: str):
super().__init__(f'No task by the id of {task_id!r} was found')
class JobLookupError(KeyError):
"""Raised when the job store cannot find a job for update or removal."""
def __init__(self, job_id: UUID):
super().__init__(f'No job by the id of {job_id} was found')
class JobResultNotReady(KeyError):
"""Raised by ``get_job_result()`` if the job result is not ready."""
def __init__(self, job_id: UUID):
super().__init__(f'No job by the id of {job_id} was found')
class JobCancelled(Exception):
"""Raised by ``run_job()`` if the job was cancelled."""
class JobDeadlineMissed(Exception):
"""Raised by ``run_job()`` if the job failed to start within the allotted time."""
class ConflictingIdError(KeyError):
"""
Raised when trying to add a schedule to a store that already contains a schedule by that ID,
and the conflict policy of ``exception`` is used.
"""
def __init__(self, schedule_id):
super().__init__(
f'This data store already contains a schedule with the identifier {schedule_id!r}')
class TransientJobError(ValueError):
"""
Raised when an attempt to add transient (with no func_ref) job to a persistent job store is
detected.
"""
def __init__(self, job_id):
super().__init__(
f'Job ({job_id}) cannot be added to this job store because a reference to the '
f'callable could not be determined.')
class SerializationError(Exception):
"""Raised when a serializer fails to serialize the given object."""
class DeserializationError(Exception):
"""Raised when a serializer fails to deserialize the given object."""
class MaxIterationsReached(Exception):
"""
Raised when a trigger has reached its maximum number of allowed computation iterations when
trying to calculate the next fire time.
"""
class SchedulerAlreadyRunningError(Exception):
"""Raised when attempting to start or configure the scheduler when it's already running."""
def __str__(self):
return 'Scheduler is already running'
class SchedulerNotRunningError(Exception):
"""Raised when attempting to shutdown the scheduler when it's not running."""
def __str__(self):
return 'Scheduler is not running'
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