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from __future__ import annotations
from datetime import datetime, timezone
from functools import partial
from uuid import UUID
import attrs
from attrs.converters import optional
from .converters import as_aware_datetime, as_uuid
from .enums import JobOutcome
@attrs.define(kw_only=True, frozen=True)
class Event:
timestamp: datetime = attrs.field(factory=partial(datetime.now, timezone.utc),
converter=as_aware_datetime)
#
# Data store events
#
@attrs.define(kw_only=True, frozen=True)
class DataStoreEvent(Event):
pass
@attrs.define(kw_only=True, frozen=True)
class TaskAdded(DataStoreEvent):
task_id: str
@attrs.define(kw_only=True, frozen=True)
class TaskUpdated(DataStoreEvent):
task_id: str
@attrs.define(kw_only=True, frozen=True)
class TaskRemoved(DataStoreEvent):
task_id: str
@attrs.define(kw_only=True, frozen=True)
class ScheduleAdded(DataStoreEvent):
schedule_id: str
next_fire_time: datetime | None = attrs.field(converter=optional(as_aware_datetime))
@attrs.define(kw_only=True, frozen=True)
class ScheduleUpdated(DataStoreEvent):
schedule_id: str
next_fire_time: datetime | None = attrs.field(converter=optional(as_aware_datetime))
@attrs.define(kw_only=True, frozen=True)
class ScheduleRemoved(DataStoreEvent):
schedule_id: str
@attrs.define(kw_only=True, frozen=True)
class JobAdded(DataStoreEvent):
job_id: UUID = attrs.field(converter=as_uuid)
task_id: str
schedule_id: str | None
tags: frozenset[str] = attrs.field(converter=frozenset)
@attrs.define(kw_only=True, frozen=True)
class JobRemoved(DataStoreEvent):
job_id: UUID = attrs.field(converter=as_uuid)
@attrs.define(kw_only=True, frozen=True)
class ScheduleDeserializationFailed(DataStoreEvent):
schedule_id: str
exception: BaseException
@attrs.define(kw_only=True, frozen=True)
class JobDeserializationFailed(DataStoreEvent):
job_id: UUID = attrs.field(converter=as_uuid)
exception: BaseException
#
# Scheduler events
#
@attrs.define(kw_only=True, frozen=True)
class SchedulerEvent(Event):
pass
@attrs.define(kw_only=True, frozen=True)
class SchedulerStarted(SchedulerEvent):
pass
@attrs.define(kw_only=True, frozen=True)
class SchedulerStopped(SchedulerEvent):
exception: BaseException | None = None
#
# Worker events
#
@attrs.define(kw_only=True, frozen=True)
class WorkerEvent(Event):
pass
@attrs.define(kw_only=True, frozen=True)
class WorkerStarted(WorkerEvent):
pass
@attrs.define(kw_only=True, frozen=True)
class WorkerStopped(WorkerEvent):
exception: BaseException | None = None
@attrs.define(kw_only=True, frozen=True)
class JobAcquired(WorkerEvent):
"""Signals that a worker has acquired a job for processing."""
job_id: UUID = attrs.field(converter=as_uuid)
worker_id: str
@attrs.define(kw_only=True, frozen=True)
class JobReleased(WorkerEvent):
"""Signals that a worker has finished processing of a job."""
job_id: UUID = attrs.field(converter=as_uuid)
worker_id: str
outcome: JobOutcome
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