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Published 2 hours ago • verified publisherglenfordwilliams.com
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Postgres broker, result backend, and scheduler utilities for Stem.

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Changelog #

0.3.0 #

  • Require Dart >=3.13.0 <4.0.0.
  • Use shared journal argument validation and replace per-record rewind cleanup with one parameterized journal deletion.
  • Join same-data-source transactions without nested queue deadlocks. Drain admitted operations before commit and make any admitted failure rollback-only, including caught failures. Bind outbox publications to their originating transaction scope and reject retained or escaped writes after it closes.
  • Add workflow journal persistence with run-row locking, record revision CAS, atomic checkpoint/compensation writes, and ordered cleanup recovery.
  • Add atomic first-terminal-wins completion/cancellation and prevent ordinary workflow mutations from resurrecting terminal runs.
  • Resolve event watchers only while their locked run is still suspended on the requested topic, preventing stale resolutions from reviving failed or replaced waits.
  • Classify fenced workflow failure outcomes inside the same row-locked transaction as the mutation. Verify competing terminal failures across independently opened stores have one applied outcome.
  • Add the additive workflow execution-fencing migration (execution_id) and fenced lease/failure operations. Apply the migration before using mixed workers or relying on stale-execution protection; terminal: false records error metadata without ending the run, while terminal failure is conditional on the captured execution identity.
  • Require Stem >=0.5.0 <1.0.0 and the shared adapter contract >=0.3.0 <1.0.0, allowing later pre-1.0 releases.

0.2.1 #

  • Widened Stem compatibility to include the 0.4 portable runtime line.
  • Raised the minimum Dart SDK to 3.12.0 and the Ormed dependencies to 0.3.0.
  • Retained generated model definitions for Stem's internal typed repositories; Ormed's codegen-free database facade remains available for application-side ad-hoc access.
  • Datasource logger injection now uses Stem's dependency-neutral StemLogger facade; the Ormed contextual logger remains an adapter implementation detail.
  • Added conditional terminal-result updates so late completion attempts cannot overwrite an existing terminal state.
  • Updated the Postgres adapter for Stem 0.3.0 and the capability-aware broker contract.
  • Added the transactional outbox, distributed rate limiter, migration registry, and historical upgrade coverage.
  • Added durable PostgreSQL lock fencing tokens with an additive migration and row-locked acquisition semantics.
  • Historical upgrade coverage verifies that current lock acquisition respects active legacy-schema locks before taking over only after expiry.

0.1.3 #

  • Removed the prerelease core dependency range from the published-package manifest.
  • Added a PostgreSQL-backed distributed token-bucket PostgresRateLimiter with server-clock refill and transactional row locking.
  • Transactional outbox wrapping and relay now accept the narrow QueueBroker contract, so queue-only adapters do not need to implement legacy inspection and dead-letter methods.

0.1.2 #

  • Added a PostgreSQL transactional outbox for atomic application writes and task publication records, with leased at-least-once dispatch.

0.1.1 #

  • Updated Ormed dependencies to 0.2.0 for the Postgres adapter stack.
  • Simplified explicit Postgres URL datasource bootstrapping to use the new Ormed code-first datasource helper path.
  • Removed explicit ensurePostgresDriverRegistration() calls from Stem Postgres runtime and seed paths by routing config-driven datasource creation through the new helper-based bootstrap code.
  • Updated Postgres workflow stores to honor caller-provided run ids, keeping adapter behavior aligned with workflow runtime metadata/manifests and the shared workflow-store contract suite.

0.1.0 #

  • Normalized postgresResultBackendFactory to accept a positional uri argument, matching the adapter factory style used across packages.
  • Updated Postgres adapter wiring to use the new factory signature.
  • Added workflow run lease tracking and claim/renew helpers to distribute workflow execution safely across workers.
  • Fixed worker heartbeat lookups by restoring soft-deleted heartbeat rows on upsert.
  • Added DataSource-based initialization that runs migrations before use, and introduced async fromDataSource helpers across Postgres adapters (including workflow stores).
  • Migrated the Postgres adapter to Ormed with generated registry/migrations for schema management.
  • Added a local seed runtime to run Postgres seeders without requiring ormed_cli.
  • Hardened lock-store timing/TTL evaluation for more reliable coordination.
  • Updated Ormed dependencies to 0.1.0.
  • Added workflow run lease migrations plus runnable discovery and metadata paging updates in the workflow store.
  • Migrated IDs to UUID v7 and simplified datasource/connection handling.
  • Added workflow store contract coverage and refreshed adapter docs/tests.
  • Updated dependencies.
  • Wired DataSource and seed runtime initialization to use the shared stemLogger by default, while still allowing explicit logger injection.
  • Hardened datasource/seed configuration overrides to safely merge nullable driver options.

0.1.0-alpha.4 #

  • Added durable watcher persistence and atomic event resolution so Durable Workflows resume with stored payloads and metadata.
  • Refreshed workflow run bookkeeping: saveStep now acts as a heartbeat, rewind/auto-version checkpoints are persisted with accurate ordering, and suspension records track resumeAt/deadline.
  • Implemented chord-claiming improvements and claim-timer cleanup to keep Postgres queues healthy during purges and consumer shutdown.
  • Shipped postgresWorkflowStoreFactory so CLI tooling and integration tests can bootstrap Postgres-backed Durable Workflows with a single helper.
  • Added lock-store contract coverage for PostgresLockStore, ensuring the semantics required by TaskOptions.unique and scheduler coordination stay portable across adapters.

0.1.0-alpha.3 #

  • Initial release containing Postgres broker, result backend, scheduler stores, and adapter contract tests extracted from the core stem package.

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Postgres broker, result backend, and scheduler utilities for Stem.

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artisanal, contextual, ormed, ormed_postgres, stem, uuid

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