73 lines
1.5 KiB
Go
73 lines
1.5 KiB
Go
package sql
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import (
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"context"
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"database/sql"
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"go.uber.org/multierr"
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"code.1533b4dc0.de/prskr/nurse/check"
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"code.1533b4dc0.de/prskr/nurse/config"
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"code.1533b4dc0.de/prskr/nurse/grammar"
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"code.1533b4dc0.de/prskr/nurse/validation"
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)
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var _ check.SystemChecker = (*SelectCheck)(nil)
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type SelectCheck struct {
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*sql.DB
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validators validation.Validator[*sql.Rows]
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Query string
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}
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func (s *SelectCheck) UnmarshalCheck(c grammar.Check, lookup config.ServerLookup) error {
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const serverAndKeyArgsNumber = 2
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inst := c.Initiator
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if err := grammar.ValidateParameterCount(inst.Params, serverAndKeyArgsNumber); err != nil {
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return err
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}
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var err error
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if s.DB, err = dbFromParam(inst.Params[0], lookup); err != nil {
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return err
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}
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if s.Query, err = inst.Params[1].AsString(); err != nil {
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return err
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}
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if s.validators, err = registry.ValidatorsForFilters(c.Validators); err != nil {
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return err
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}
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return nil
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}
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func (s *SelectCheck) Execute(ctx check.Context) error {
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for {
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select {
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case <-ctx.Done():
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return ctx.Err()
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default:
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attemptCtx, cancel := ctx.AttemptContext()
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err := s.executeAttempt(attemptCtx)
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cancel()
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if err == nil {
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return nil
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}
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}
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}
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}
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func (s *SelectCheck) executeAttempt(ctx context.Context) (err error) {
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var rows *sql.Rows
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rows, err = s.QueryContext(ctx, s.Query)
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if err != nil {
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return err
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}
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defer multierr.AppendInvoke(&err, multierr.Close(rows))
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defer multierr.AppendInvoke(&err, multierr.Invoke(rows.Err))
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return s.validators.Validate(rows)
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}
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