generated from coulomb/repo-seed
tegwick
0a49798699
src/artifactstore/events/:
- model.py: Event frozen dataclass (event_type, subject_kind, subject_id,
actor, payload, payload_digest; sequence + created_at populated by the
DB on write). make_event() helper computes payload_digest as raw BLAKE3
(32 bytes) of payload. ViewWriter Protocol with reset() + apply().
- log.py:
* write(connection, event) — inserts one row in the caller's transaction
and returns Event with sequence + created_at populated via RETURNING.
* fetch_since(connection, since_sequence, limit) — read events after a
cursor in order.
* tail(engine, since_sequence) — async-iterator long-poll over the log;
SQLite uses interval polling, PG LISTEN/NOTIFY is a future workplan.
* replay(engine, view_writer, reset=True) — drains the event log through
a ViewWriter inside one transaction; returns the highest sequence
applied.
- views.py: RegistryViewWriter — canonical event handlers shared by direct
write and replay paths. Ships handlers for v1.package.created (inserts
artifact_packages + retention_state) and v1.package.finalized (updates
status, finalized_at, manifest_digest). Unknown event types tolerated;
additional handlers register here as later tasks land.
src/artifactstore/db/schema.py: events.sequence type is now
BigInteger().with_variant(Integer(), 'sqlite') so SQLite's autoincrement
(INTEGER PRIMARY KEY rowid alias) works while PostgreSQL keeps BIGSERIAL.
tests/integration/test_event_log.py (6 cases):
- write() assigns monotonic sequence numbers (1, 2, ...) and a created_at.
- fetch_since(since_sequence=2) returns the ordered tail.
- tail() yields events and exits cleanly on consumer break.
- Direct write path (write + apply) and replay path produce byte-identical
materialised state — the key ADR-0002 invariant.
- Replay handles multiple event types (package.created -> finalized).
- Unknown event types are tolerated (no-op apply).
- payload_digest equals BLAKE3 of payload.
Gates: ruff clean, mypy --strict clean on 36 files, 45 tests pass.
make migrate-fresh end-to-end ok.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>