nurse/protocols/sql/select.go
Peter Kurfer 0faff1d481
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chore: cleanup, add docs, refactor some quirks and prepare release
2023-12-04 16:59:10 +01:00

69 lines
1.5 KiB
Go

package sql
import (
"context"
"database/sql"
"errors"
"log/slog"
"code.icb4dc0.de/prskr/nurse/check"
"code.icb4dc0.de/prskr/nurse/config"
"code.icb4dc0.de/prskr/nurse/grammar"
"code.icb4dc0.de/prskr/nurse/internal/retry"
"code.icb4dc0.de/prskr/nurse/validation"
)
var _ check.SystemChecker = (*SelectCheck)(nil)
type SelectCheck struct {
*sql.DB
validators validation.Validator[*sql.Rows]
Query string
}
func (s *SelectCheck) UnmarshalCheck(c grammar.Check, lookup config.ServerLookup) error {
const serverAndKeyArgsNumber = 2
inst := c.Initiator
if err := grammar.ValidateParameterCount(inst.Params, serverAndKeyArgsNumber); err != nil {
return err
}
var err error
if s.DB, err = dbFromParam(inst.Params[0], lookup); err != nil {
return err
}
if s.Query, err = inst.Params[1].AsString(); err != nil {
return err
}
if s.validators, err = registry.ValidatorsForFilters(c.Validators); err != nil {
return err
}
return nil
}
func (s *SelectCheck) Execute(ctx check.Context) error {
logger := slog.Default().With(
slog.String("check", "sql.SELECT"),
slog.String("query", s.Query),
)
return retry.Retry(ctx, ctx.AttemptCount(), ctx.AttemptTimeout(), func(ctx context.Context, attempt int) error {
logger.Debug("Execute check", slog.Int("attempt", attempt))
logger.Debug("")
rows, err := s.QueryContext(ctx, s.Query)
if err != nil {
return err
}
defer func() {
err = errors.Join(rows.Close(), rows.Err())
}()
return s.validators.Validate(rows)
})
}