68 lines
3.2 KiB
Markdown
68 lines
3.2 KiB
Markdown
# corestack go
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Shared Go building blocks. Includes `docs`, a checker for architecture decision records (ADRs) and implementation plans; `page`, Bob keyset pagination; and `lifecycle`, a service and worker coordinator.
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## docs
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Install:
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```sh
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go install go.auvem.com/corestack/cmd/docs@latest
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```
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Use, from a repository root:
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```sh
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docs new adr "Use Example Queue for background jobs" # creates docs/adr/<id>.md
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docs new plan "Adopt Example Queue" # creates docs/plans/<id>.md
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docs check [--root DIR] # prints path:line: message; exit 1 on problems
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```
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The format is specified in [docs/docs-format.md](docs/docs-format.md); that document is the complete rule set. Exit status is `0` when every record is valid, `1` when problems are reported and `2` for usage errors.
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## page
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[`page`](page/page.go) provides transport-neutral Bob keyset pagination with typed
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items, mixed-direction sorts, opaque typed cursors, and a separate opt-in count.
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Pass a trusted Sort and a typed row key in the same column order; sort columns
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must be non-null and end in a unique column. See the [runnable example](page/example_test.go)
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and [cursor decision](docs/adr/20261027T184351001Z-preserve-typed-sort-values-in-versioned-page-cursors.md).
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SQLite runs in-process in the normal test suite (requires CGO). PostgreSQL runs in
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CI; locally set `PAGE_POSTGRES_DSN` to an isolated test database to run the same
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flow. Set `PAGE_REQUIRE_POSTGRES=1` to fail rather than skip when the DSN is absent.
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MySQL mod composition compiles; its runtime behavior has not been verified.
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## lifecycle
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`go.auvem.com/corestack/lifecycle` sets up modules in registration order, runs
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services concurrently, and tears down successful setups in reverse order.
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Construct an `App` with a required `*slog.Logger`, register `Module` callbacks,
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and call `Run(ctx)` once. See the [two-service example](lifecycle/example_test.go).
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Launch background work with `app.Go(ctx, name, fn)` using the callback's lifecycle
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context or a descendant, and handle admission errors. Run waits for every service
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and admitted worker; raw goroutines remain your responsibility. First failure or
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an injected signal cancels work before teardown. One shared shutdown deadline
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(default 30 seconds) covers hooks and callback completion; a second signal
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abandons shutdown. Callbacks must cooperate: abandonment cannot kill goroutines,
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and the caller owns process exit and any unreleased resources.
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During App-initiated shutdown, callback errors containing only the callback's
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context cancellation are omitted. Mixed cancellation and independent failures
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are retained intact to preserve wrapper types, identity and custom matching;
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these errors may still match cancellation through `errors.Is`.
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The caller owns signal subscription, SIGINT/SIGTERM filtering, a channel buffered
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for at least two signals, and subscription cleanup. Nil signals disable reception.
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There are no signal subscriptions, process exits, external dependencies or CLI
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integration in this package.
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## Status
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No support is guaranteed. Breaking changes, including to the format rules, may happen before 1.0 and are listed in the release notes.
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## License
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BSD-3-Clause, see [LICENSE](LICENSE).
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