| 1 | package schedule |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "github.com/carlosframework/platform/internal/hostwrite" |
| 7 | "github.com/carlosframework/platform/internal/registry" |
| 8 | "os" |
| 9 | ) |
| 10 | |
| 11 | type timerMutator interface { |
| 12 | MutateTimer(context.Context, registry.Timer, string, bool) (*registry.Timer, error) |
| 13 | } |
| 14 | |
| 15 | func mutateSelectedTimer(ctx context.Context, t registry.Timer, expected string, remove bool) (*registry.Timer, bool, error) { |
| 16 | selected, ok := ctx.Value(timerWorkKey{}).(timerWork) |
| 17 | if !ok || selected.work == nil { |
| 18 | return nil, false, nil |
| 19 | } |
| 20 | m, ok := selected.work.(timerMutator) |
| 21 | if !ok { |
| 22 | return nil, false, nil |
| 23 | } |
| 24 | row, err := m.MutateTimer(ctx, t, expected, remove) |
| 25 | return row, true, err |
| 26 | } |
| 27 | |
| 28 | func deleteSelectedTimer(ctx context.Context, reg *registry.Registry, t registry.Timer) error { |
| 29 | if _, handled, err := mutateSelectedTimer(ctx, t, t.Registration, true); handled { |
| 30 | return err |
| 31 | } |
| 32 | return withTimerWork(ctx, func() error { return reg.DeleteTimerRegistration(t.Host, t.Name, t.Registration) }) |
| 33 | } |
| 34 | |
| 35 | type ClaimTimers struct { |
| 36 | TimerStore |
| 37 | Writes hostwrite.Config |
| 38 | Context context.Context |
| 39 | } |
| 40 | |
| 41 | func (s ClaimTimers) UpsertTimer(t registry.Timer) error { |
| 42 | work, err := s.Writes.Select(s.Context, t.Host, "timers") |
| 43 | if err != nil { |
| 44 | return err |
| 45 | } |
| 46 | return (SelectedTimers{Store: s.TimerStore, Work: work, Context: s.Context, Host: t.Host}).UpsertTimer(t) |
| 47 | } |
| 48 | func (s ClaimTimers) DeleteTimer(host, name string) error { |
| 49 | work, err := s.Writes.Select(s.Context, host, "timers") |
| 50 | if err != nil { |
| 51 | return err |
| 52 | } |
| 53 | return (SelectedTimers{Store: s.TimerStore, Work: work, Context: s.Context, Host: host}).DeleteTimer(host, name) |
| 54 | } |
| 55 | |
| 56 | func (s SelectedTimers) mutate(t registry.Timer, remove bool) (bool, error) { |
| 57 | m, ok := s.Work.(timerMutator) |
| 58 | if !ok { |
| 59 | return false, nil |
| 60 | } |
| 61 | if s.Store == nil || s.Context == nil || t.Host != s.Host { |
| 62 | return true, hostwrite.ErrUnavailable |
| 63 | } |
| 64 | var old *registry.Timer |
| 65 | err := s.Work.With(s.Context, hostwrite.Identity{}, func() error { |
| 66 | var err error |
| 67 | old, err = s.Store.GetTimer(t.Host, t.Name) |
| 68 | if errors.Is(err, os.ErrNotExist) { |
| 69 | return nil |
| 70 | } |
| 71 | return err |
| 72 | }) |
| 73 | if err != nil { |
| 74 | return true, err |
| 75 | } |
| 76 | expected := "" |
| 77 | if old != nil { |
| 78 | expected = old.Registration |
| 79 | if old.Kind != t.Kind && !remove { |
| 80 | return true, registry.ErrTimerKind |
| 81 | } |
| 82 | } |
| 83 | if remove { |
| 84 | if old == nil { |
| 85 | return true, nil |
| 86 | } |
| 87 | t = *old |
| 88 | } |
| 89 | _, err = m.MutateTimer(s.Context, t, expected, remove) |
| 90 | return true, err |
| 91 | } |
| 92 | |
| 93 | func hasTimerMutator(ctx context.Context) bool { |
| 94 | s, ok := ctx.Value(timerWorkKey{}).(timerWork) |
| 95 | if !ok { |
| 96 | return false |
| 97 | } |
| 98 | _, ok = s.work.(timerMutator) |
| 99 | return ok |
| 100 | } |
| 101 | |
amadan