Rene Nochebuena
4b58f8e3d9
Introduces code.nochebuena.dev/einherjar/db-postgres — the PostgreSQL database starter for the Einherjar framework. Absorbs the postgres package from micro-lib, replacing fmt.Errorf wrapping with core/xerrors and migrating from pgx v4 to pgx v5. Interfaces (CT-6: one TypeSpec per file): - Executor — Exec, Query, QueryRow (pgx-native types) - Tx — Executor + Commit(ctx), Rollback(ctx) - Provider — GetExecutor, Begin, BeginTx, Ping, HandleError - Component — lifecycle.Component + observability.Checkable + Provider + Stats() - UnitOfWork — Do(ctx, fn) Implementation: - New(logger, cfg) Component — pool not created until OnInit - OnInit: pgxpool.NewWithConfig with duration parsing; 30s timeout - OnStart: PING with 5s timeout; logs "postgres: connected" - OnStop: pool.Close(); logs "postgres: closing pool" - GetExecutor: returns active Tx from context (ctxTxKey) or pool; nil-safe - Begin/BeginTx: wraps pgx.TxOptions; wrapped in xerrors on error - HealthCheck: delegates to Ping; Priority LevelCritical - Stats() *pgxpool.Stat — zero value when pool uninitialized - NewUnitOfWork(logger, provider) UnitOfWork — Begin+inject+commit/rollback - HandleError: UniqueViolation→ErrAlreadyExists, ForeignKey/Check→ErrInvalidInput, pgx.ErrNoRows→ErrNotFound, all others→ErrInternal Config (EINHERJAR_PG_* env vars): Host, Port(5432), User, Password, Name, SSLMode(disable), Timezone(UTC), MaxConns(5), MinConns(2), MaxConnLifetime(1h), MaxConnIdleTime(30m), HealthCheckPeriod(1m) - Component interface embeds observability.Identifiable; identifiable.go implements ModulePath and ModuleVersion via runtime/debug.ReadBuildInfo() — prints in launcher banner
54 lines
1.9 KiB
Go
54 lines
1.9 KiB
Go
package postgres
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import (
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"fmt"
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"net/url"
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)
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// Config holds PostgreSQL connection settings. Required fields must be supplied
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// by the caller; optional fields have production-safe defaults via [DefaultConfig].
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type Config struct {
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Host string `env:"EINHERJAR_PG_HOST,required"`
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Port int `env:"EINHERJAR_PG_PORT" envDefault:"5432"`
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User string `env:"EINHERJAR_PG_USER,required"`
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Password string `env:"EINHERJAR_PG_PASSWORD,required"`
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Name string `env:"EINHERJAR_PG_NAME,required"`
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SSLMode string `env:"EINHERJAR_PG_SSL_MODE" envDefault:"disable"`
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Timezone string `env:"EINHERJAR_PG_TIMEZONE" envDefault:"UTC"`
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MaxConns int `env:"EINHERJAR_PG_MAX_CONNS" envDefault:"5"`
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MinConns int `env:"EINHERJAR_PG_MIN_CONNS" envDefault:"2"`
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MaxConnLifetime string `env:"EINHERJAR_PG_MAX_CONN_LIFETIME" envDefault:"1h"`
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MaxConnIdleTime string `env:"EINHERJAR_PG_MAX_CONN_IDLE_TIME" envDefault:"30m"`
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HealthCheckPeriod string `env:"EINHERJAR_PG_HEALTH_CHECK_PERIOD" envDefault:"1m"`
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}
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// DefaultConfig returns a Config with all optional fields set to production-safe
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// defaults. Callers must supply Host, Port, User, Password, and Name.
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func DefaultConfig() Config {
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return Config{
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Port: 5432,
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SSLMode: "disable",
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Timezone: "UTC",
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MaxConns: 5,
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MinConns: 2,
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MaxConnLifetime: "1h",
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MaxConnIdleTime: "30m",
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HealthCheckPeriod: "1m",
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}
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}
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// DSN constructs a PostgreSQL connection string from the configuration.
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func (c Config) DSN() string {
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u := &url.URL{
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Scheme: "postgres",
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User: url.UserPassword(c.User, c.Password),
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Host: fmt.Sprintf("%s:%d", c.Host, c.Port),
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Path: "/" + c.Name,
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}
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q := u.Query()
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q.Set("sslmode", c.SSLMode)
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q.Set("timezone", c.Timezone)
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u.RawQuery = q.Encode()
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return u.String()
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}
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