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https://github.com/Hestia-Homes/Model.git
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e778d1fb97
Slice 4a. The Modelling stage reads the Scenario + Product catalogue and writes the Plan + its Plan Measures on one session, committed once (ADR-0012/0017). Adds uow.scenario / uow.product / uow.plan to the UnitOfWork port and constructs them in PostgresUnitOfWork.__enter__. Additive — existing stages and the bare-stub Modelling wiring are unaffected. Wiring test asserts the unit exposes the three ports. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
66 lines
2.3 KiB
Python
66 lines
2.3 KiB
Python
from __future__ import annotations
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from collections.abc import Callable
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from types import TracebackType
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from typing import Optional
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from sqlmodel import Session
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from repositories.property_baseline.property_baseline_postgres_repository import (
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PropertyBaselinePostgresRepository,
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)
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from repositories.epc.epc_postgres_repository import EpcPostgresRepository
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from repositories.plan.plan_postgres_repository import PlanPostgresRepository
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from repositories.product.product_postgres_repository import (
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ProductPostgresRepository,
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)
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from repositories.property.property_postgres_repository import (
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PropertyPostgresRepository,
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)
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from repositories.scenario.scenario_postgres_repository import (
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ScenarioPostgresRepository,
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)
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from repositories.solar.solar_postgres_repository import SolarPostgresRepository
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from repositories.unit_of_work import UnitOfWork
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class PostgresUnitOfWork(UnitOfWork):
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"""Postgres-backed Unit of Work: one ``Session``, all repos bound to it.
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Built from a session factory (a module-scoped engine + sessionmaker in
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production, ADR-0012) so the connection pool is reused across warm Lambda
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invocations. The session is opened on ``__enter__`` and closed on
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``__exit__``; a fresh instance is one single-use unit.
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"""
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def __init__(self, session_factory: Callable[[], Session]) -> None:
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self._session_factory = session_factory
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def __enter__(self) -> "PostgresUnitOfWork":
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self._session = self._session_factory()
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epc_repo = EpcPostgresRepository(self._session)
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self.property = PropertyPostgresRepository(self._session, epc_repo)
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self.epc = epc_repo
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self.solar = SolarPostgresRepository(self._session)
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self.property_baseline = PropertyBaselinePostgresRepository(self._session)
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self.scenario = ScenarioPostgresRepository(self._session)
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self.product = ProductPostgresRepository(self._session)
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self.plan = PlanPostgresRepository(self._session)
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return self
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def __exit__(
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self,
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exc_type: Optional[type[BaseException]],
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exc: Optional[BaseException],
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tb: Optional[TracebackType],
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) -> None:
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try:
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self._session.rollback()
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finally:
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self._session.close()
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def commit(self) -> None:
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self._session.commit()
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def rollback(self) -> None:
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self._session.rollback()
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