0010_coordination_bus.py
python
sha256:a10adeeb7a0169cb9900f9806ed7a973047258abb6283724fe55e8eb68ff3f0a
init: musehub initial commit
Human
170 days ago
| 1 | """Add musehub_coord_records table for the coordination bus. |
| 2 | |
| 3 | Agents on different machines push local coordination records (reservations, |
| 4 | intents, releases, heartbeats, dependencies, tasks, claims) to this table so |
| 5 | that distributed agent swarms can share state without filesystem access. |
| 6 | |
| 7 | Key design choices: |
| 8 | - ``id`` is a monotonically increasing integer PK used as the SSE cursor — |
| 9 | more reliable than timestamps for ordering within the same millisecond. |
| 10 | - ``(repo_id, kind, record_uuid)`` unique constraint enforces write-once |
| 11 | semantics at the DB level (the service layer skips on IntegrityError). |
| 12 | - ``ix_coord_repo_id_cursor`` optimizes the primary pull query pattern: |
| 13 | "give me all records for repo X with id > Y in insertion order". |
| 14 | - ``ix_coord_repo_kind_id`` optimizes filtered pulls: |
| 15 | "give me all heartbeats for repo X with id > Y". |
| 16 | - ``ON DELETE CASCADE`` on the FK ensures coord records are removed when |
| 17 | their parent repo is deleted. |
| 18 | |
| 19 | Revision ID: 0010 |
| 20 | Revises: 0009 |
| 21 | """ |
| 22 | |
| 23 | from __future__ import annotations |
| 24 | |
| 25 | from alembic import op |
| 26 | import sqlalchemy as sa |
| 27 | |
| 28 | revision: str = "0010" |
| 29 | down_revision: str = "0009" |
| 30 | branch_labels = None |
| 31 | depends_on = None |
| 32 | |
| 33 | |
| 34 | def upgrade() -> None: |
| 35 | op.create_table( |
| 36 | "musehub_coord_records", |
| 37 | sa.Column("id", sa.Integer(), autoincrement=True, nullable=False), |
| 38 | sa.Column("repo_id", sa.String(36), nullable=False), |
| 39 | sa.Column("kind", sa.String(32), nullable=False), |
| 40 | sa.Column("record_uuid", sa.String(36), nullable=False), |
| 41 | sa.Column("run_id", sa.String(255), nullable=False, server_default=""), |
| 42 | sa.Column("payload", sa.JSON(), nullable=False), |
| 43 | sa.Column("created_at", sa.DateTime(timezone=True), nullable=False), |
| 44 | sa.Column("expires_at", sa.DateTime(timezone=True), nullable=True), |
| 45 | sa.ForeignKeyConstraint( |
| 46 | ["repo_id"], |
| 47 | ["musehub_repos.repo_id"], |
| 48 | name="fk_coord_repo_id", |
| 49 | ondelete="CASCADE", |
| 50 | ), |
| 51 | sa.PrimaryKeyConstraint("id"), |
| 52 | sa.UniqueConstraint( |
| 53 | "repo_id", "kind", "record_uuid", |
| 54 | name="uq_coord_repo_kind_uuid", |
| 55 | ), |
| 56 | ) |
| 57 | op.create_index( |
| 58 | "ix_coord_repo_id_cursor", |
| 59 | "musehub_coord_records", |
| 60 | ["repo_id", "id"], |
| 61 | ) |
| 62 | op.create_index( |
| 63 | "ix_coord_repo_kind_id", |
| 64 | "musehub_coord_records", |
| 65 | ["repo_id", "kind", "id"], |
| 66 | ) |
| 67 | # Index on repo_id alone for fast repo-scoped queries without kind filter. |
| 68 | op.create_index( |
| 69 | "ix_coord_records_repo_id", |
| 70 | "musehub_coord_records", |
| 71 | ["repo_id"], |
| 72 | ) |
| 73 | |
| 74 | |
| 75 | def downgrade() -> None: |
| 76 | op.drop_index("ix_coord_records_repo_id", table_name="musehub_coord_records") |
| 77 | op.drop_index("ix_coord_repo_kind_id", table_name="musehub_coord_records") |
| 78 | op.drop_index("ix_coord_repo_id_cursor", table_name="musehub_coord_records") |
| 79 | op.drop_table("musehub_coord_records") |
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sha256:a10adeeb7a0169cb9900f9806ed7a973047258abb6283724fe55e8eb68ff3f0a
init: musehub initial commit
Human
170 days ago