mirror of https://github.com/OpenVidu/openvidu.git
81 lines
4.9 KiB
Markdown
81 lines
4.9 KiB
Markdown
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# @openvidu-dashboard/typings
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Contracts shared by the dashboard backend and frontend, including the analytics data model that the OpenVidu server
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(`openvidu-livekit`, `openvidu/analytics/`) writes and the dashboard reads.
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## Analytics data model contract
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| Path | Content |
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| ----------------------------- | --------------------------------------------------------------------------------------- |
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| `src/schema-version.ts` | `SCHEMA_VERSION` and `MIN_SUPPORTED_SCHEMA_VERSION` |
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| `src/data-model/` | Document types, enums, collection names, retention defaults |
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| `schema/*.schema.json` | One MongoDB `$jsonSchema` validator per collection |
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| `schema/indexes.json` | Every index the writer creates (keys, options, TTL as fixed seconds or retention class) |
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| `schema/collections.json` | Collections in creation order, validator file, retention class, time-series options |
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| `schema/contract_version.txt` | `SCHEMA_VERSION` as text, read by the writer's contract test |
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| `fixtures/*.json` | Canonical documents per collection, in Extended JSON with explicit BSON number types |
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| `contract/` | Sources of `schema/` and `fixtures/` (schema builder, index list, fixture scenario) |
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`schema/` and `fixtures/` are generated: edit `contract/` and run `pnpm --filter @openvidu-dashboard/typings contract`.
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The tests fail when a generated file is out of date.
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### Conventions
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- Dates are UTC `Date`; durations integer milliseconds (`…Ms`); sizes integer bytes; `jitter` in milliseconds as a
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double; `score` is the LiveKit MOS (1.0–4.5).
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- Counters are int32 (int64 accepted); milliseconds and bytes are int64 (int32 accepted); ratios and scores are double.
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- An optional field is absent while unknown, never `null`. Exception: `expiresAt` is `null` while an entity is open.
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- Rollup counters are created by their first increment: an absent counter is zero.
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- Protocol enums keep the protocol name without prefix (`API_DELETE`, `CLIENT_INITIATED`); model statuses are lower
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case. Rollup map keys are enum names or fixed vocabularies, never user input.
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- `internal` holds writer bookkeeping (id sets behind counters); the dashboard never reads it.
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- Validators reject unknown fields; the writer applies them with `validationAction: warn` in production and `error` in
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tests. Time-series collections do not accept validators, so `track_stats` is validated only in the plain-collection
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fallback.
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### Reconciler closures
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The writer's reconciler closes rooms, participant sessions, egress and ingress sessions whose end event never arrived
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(node crash, unflushed shutdown, lost event):
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- Closed documents carry `closedBy: "reconciler"`; entities closed by their own event carry `closedBy: "event"`.
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- Rooms get `endReason: "RECONCILED"`, participants `disconnectReason: "RECONCILED"` (`left`, or `aborted` when the
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session never became active), egress `status: "failed"` with `error: "egress lost (reconciled)"`, ingress sessions
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`status: "error"`.
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- The end time is estimated from the last signal of the entity, `max(lastStatsAt, lastEventAt)` (at most one stats
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interval early); tracks and subscriptions closed with a participant inherit its end time.
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- Every closure has one raw event of the matching close type with `synthetic: true` and `_id: "AE_SYN_<entity id>"`;
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its payload adds `reconciler.reason` (`node-dead`, `absent-live`, `cascade`, `room-closed-node-dead`).
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- Counters and rollups count a closure once. A real close event that arrives later replaces the end time, the reason
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and `closedBy`, and is not counted again.
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- `schema_meta` `_id: "reconciler"` records the last run.
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### When to bump `SCHEMA_VERSION`
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Once a version has shipped in a release, bump it in the same coordinated change on both sides when the other side must
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know about the change:
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- a collection, field or index is added, removed or renamed;
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- a field changes type, unit or meaning, or an enum gains or loses a value;
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- a retention class or the shape of a `schema_meta` document changes.
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Descriptions, fixture values and tests do not need a bump. Until the first release that ships a version, that version
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may still change without a bump. Raise `MIN_SUPPORTED_SCHEMA_VERSION` only when the dashboard depends on the new
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contract.
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### Sharing the contract with the writer
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The writer vendors `schema/` and `fixtures/` under `openvidu-livekit/openvidu/analytics/schema/contract/` and fails its
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tests when `contract_version.txt` differs from its own schema version constant:
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```sh
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dashboard-ce/typings/contract/vendor.sh ../openvidu-livekit
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```
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## Commands
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```sh
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pnpm --filter @openvidu-dashboard/typings test # contract tests (Vitest)
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pnpm --filter @openvidu-dashboard/typings contract # regenerate schema/ and fixtures/
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```
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