nurse/protocols/sql/select.go
Peter Kurfer c52912c5aa
Some checks failed
agola/nurse/Test and lint The run failed
refactor: migrate to new Gitea URL
2022-09-22 11:46:36 +02:00

73 lines
1.5 KiB
Go

package sql
import (
"context"
"database/sql"
"go.uber.org/multierr"
"code.icb4dc0.de/prskr/nurse/check"
"code.icb4dc0.de/prskr/nurse/config"
"code.icb4dc0.de/prskr/nurse/grammar"
"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 {
for {
select {
case <-ctx.Done():
return ctx.Err()
default:
attemptCtx, cancel := ctx.AttemptContext()
err := s.executeAttempt(attemptCtx)
cancel()
if err == nil {
return nil
}
}
}
}
func (s *SelectCheck) executeAttempt(ctx context.Context) (err error) {
var rows *sql.Rows
rows, err = s.QueryContext(ctx, s.Query)
if err != nil {
return err
}
defer multierr.AppendInvoke(&err, multierr.Close(rows))
defer multierr.AppendInvoke(&err, multierr.Invoke(rows.Err))
return s.validators.Validate(rows)
}