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d856ae8573
The inner ring of the schedule slice, added on its own so it can be read as domain modelling rather than as a diff against the old implementation: two aggregates with their state machines, the policy value object, the output ports the service depends on, and the errors it raises. Nothing wires it up yet -- no existing code path changes. The service is exercised end to end against in-memory fakes, which is what makes the rules (overlap policy, lease handling, which write owns which timestamp) assertable without a database at all. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
68 lines
2.2 KiB
Python
68 lines
2.2 KiB
Python
"""The known errors of the schedule context.
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One family under one base class, so the primary adapter can map the whole
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family onto protocol codes in a single table. Class names keep the PEP 8
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``Error`` suffix; the module is named ``exceptions`` after the AWS
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hexagonal guidance's domain folder of the same name.
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"""
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from __future__ import annotations
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class ScheduleError(Exception):
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"""Base error for the schedule domain."""
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class InvalidScheduleError(ScheduleError):
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"""Timezone, cron expression, or run_at is not usable."""
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class InvalidContextModeError(ScheduleError):
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"""context_mode is unknown, or reuse_thread is missing its thread_id."""
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class TaskNotFoundError(ScheduleError):
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"""The task does not exist or does not belong to the user."""
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class TaskNotMutableError(ScheduleError):
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"""The task is currently running and cannot be edited."""
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class ThreadNotFoundError(ScheduleError):
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"""reuse_thread points at a thread the user cannot access."""
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class CorruptStoredScheduleError(ScheduleError):
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"""A stored task row can no longer be rebuilt into a valid aggregate.
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Raised by the persistence adapter, never by the aggregate: it means the
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*storage* is damaged, not that a client submitted something invalid --
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which is why it is deliberately absent from the router's status table and
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falls through to the unclassified-500 branch instead of riding
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``InvalidScheduleError``'s 422.
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"""
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class ActiveRunConflictError(ScheduleError):
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"""The task already holds its single active run slot.
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Raised by the run repository when the partial unique index
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``uq_scheduled_task_run_active`` rejects a second active row. Moved here
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from ``persistence/scheduled_task_runs/sql.py`` (was
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``ActiveScheduledRunConflict``) so the domain owns its own vocabulary.
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"""
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class ThreadBusyError(ScheduleError):
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"""The execution thread already has an in-flight run.
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Translated by the RunLauncher adapter from ConflictError / HTTP 409.
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This is what removes `from fastapi import HTTPException` from the
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orchestration layer.
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"""
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class LaunchFailedError(ScheduleError):
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"""The run could not be launched for any non-conflict reason."""
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