tag/v1.0.0/component.go

package sqlite

import (
	"code.nochebuena.dev/einherjar/contracts/lifecycle"
	"code.nochebuena.dev/einherjar/contracts/observability"
)

// Component bundles the full sqlite capability: lifecycle management,
// health reporting, and the database [Provider] interface.
// Register with launcher and health before starting.
type Component interface {
	lifecycle.Component
	observability.Checkable
	observability.Identifiable
	Provider
}
feat(db-sqlite): initial implementation — database/sql SQLite with lifecycle and UnitOfWork (v1.0.0) Introduces code.nochebuena.dev/einherjar/db-sqlite — the SQLite database starter for the Einherjar framework. Absorbs the sqlite package from micro-lib using the pure-Go modernc.org/sqlite driver (no CGO, cross-compilation compatible). Interfaces (CT-6: one TypeSpec per file): - Executor — ExecContext, QueryContext, QueryRowContext (database/sql types) - Tx — Executor + Commit(), Rollback() — no ctx; honest database/sql contract - Provider — GetExecutor, Begin, Ping, HandleError - Component — lifecycle.Component + observability.Checkable + Provider - UnitOfWork — Do(ctx, fn) Implementation: - New(logger, cfg) Component — pool not created until OnInit - OnInit: sql.Open with DSN (Path + Pragmas); sets MaxOpenConns, MaxIdleConns - OnStart: Ping with 5s timeout; logs "sqlite: connected" - OnStop: db.Close(); logs "sqlite: closing pool" - GetExecutor: returns active Tx from context (ctxTxKey) or sql.DB; explicit nil return when db uninitialized to avoid typed-nil interface pitfall - Begin: wraps db.BeginTx; wrapped in xerrors on error - HealthCheck: delegates to Ping; Priority LevelDegraded (file DB; absence is non-fatal on a server restart — file always present if configured) - NewUnitOfWork(logger, provider) UnitOfWork — acquires writeMu before Begin to prevent SQLITE_BUSY under concurrent goroutines (SQLite single-writer model) - writeMu: extracted from sqliteImpl via type assertion in NewUnitOfWork; gracefully skipped when provider is a mock (nil mu) - HandleError: sql.ErrNoRows→ErrNotFound, unique/pk constraint→ErrAlreadyExists, foreign key→ErrInvalidInput, all others→ErrInternal Config (EINHERJAR_SQLITE_* env vars): Path(required), MaxOpenConns(1), MaxIdleConns(1), Pragmas(?_journal=WAL&_timeout=5000&_fk=true) - Component interface embeds observability.Identifiable; identifiable.go implements ModulePath and ModuleVersion via runtime/debug.ReadBuildInfo() — prints in launcher banner 2026-05-29 15:56:45 +00:00			`package sqlite`

			`import (`
			`"code.nochebuena.dev/einherjar/contracts/lifecycle"`
			`"code.nochebuena.dev/einherjar/contracts/observability"`
			`)`

			`// Component bundles the full sqlite capability: lifecycle management,`
			`// health reporting, and the database [Provider] interface.`
			`// Register with launcher and health before starting.`
			`type Component interface {`
			`lifecycle.Component`
			`observability.Checkable`
			`observability.Identifiable`
			`Provider`
			`}`