| 1 | package hostbox |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "io" |
| 6 | "sync" |
| 7 | |
| 8 | "github.com/carlosframework/platform/internal/lease" |
| 9 | ) |
| 10 | |
| 11 | // RequestStore bounds complete SDK operations, including retries. Check must |
| 12 | // inspect current captured authority and aggregate lease health. The supplied |
| 13 | // context must also be cancelled by the operation owner on lease loss. |
| 14 | type RequestStore struct { |
| 15 | Store lease.VersionedStore |
| 16 | Check func(context.Context) error |
| 17 | } |
| 18 | |
| 19 | func (s RequestStore) request(ctx context.Context) (context.Context, context.CancelFunc, error) { |
| 20 | if ctx == nil || s.Store == nil || s.Check == nil { |
| 21 | return nil, nil, ErrUnsupported |
| 22 | } |
| 23 | bounded, cancel := context.WithTimeout(ctx, RequestLimit) |
| 24 | if err := s.Check(bounded); err != nil { |
| 25 | cancel() |
| 26 | return nil, nil, err |
| 27 | } |
| 28 | if err := bounded.Err(); err != nil { |
| 29 | cancel() |
| 30 | return nil, nil, err |
| 31 | } |
| 32 | return bounded, cancel, nil |
| 33 | } |
| 34 | func (s RequestStore) ListVersions(ctx context.Context, bucket, prefix string) ([]lease.ObjectVersion, error) { |
| 35 | ctx, cancel, err := s.request(ctx) |
| 36 | if err != nil { |
| 37 | return nil, err |
| 38 | } |
| 39 | defer cancel() |
| 40 | return s.Store.ListVersions(ctx, bucket, prefix) |
| 41 | } |
| 42 | func (s RequestStore) GetVersion(ctx context.Context, bucket, key, version string) ([]byte, error) { |
| 43 | ctx, cancel, err := s.request(ctx) |
| 44 | if err != nil { |
| 45 | return nil, err |
| 46 | } |
| 47 | defer cancel() |
| 48 | return s.Store.GetVersion(ctx, bucket, key, version) |
| 49 | } |
| 50 | func (s RequestStore) OpenVersion(ctx context.Context, bucket, key, version string) (io.ReadCloser, error) { |
| 51 | ctx, cancel, err := s.request(ctx) |
| 52 | if err != nil { |
| 53 | return nil, err |
| 54 | } |
| 55 | r, err := s.Store.OpenVersion(ctx, bucket, key, version) |
| 56 | if err != nil { |
| 57 | cancel() |
| 58 | return nil, err |
| 59 | } |
| 60 | if r == nil { |
| 61 | cancel() |
| 62 | return nil, ErrUnsupported |
| 63 | } |
| 64 | return &requestReader{ReadCloser: r, cancel: cancel}, nil |
| 65 | } |
| 66 | func (s RequestStore) CopyVersion(ctx context.Context, sb, sk, sv, db, dk string, createOnly bool) (string, string, error) { |
| 67 | ctx, cancel, err := s.request(ctx) |
| 68 | if err != nil { |
| 69 | return "", "", err |
| 70 | } |
| 71 | defer cancel() |
| 72 | return s.Store.CopyVersion(ctx, sb, sk, sv, db, dk, createOnly) |
| 73 | } |
| 74 | func (s RequestStore) DeleteVersion(ctx context.Context, bucket, key, version string) error { |
| 75 | ctx, cancel, err := s.request(ctx) |
| 76 | if err != nil { |
| 77 | return err |
| 78 | } |
| 79 | defer cancel() |
| 80 | return s.Store.DeleteVersion(ctx, bucket, key, version) |
| 81 | } |
| 82 | func (s RequestStore) PutIfAbsent(ctx context.Context, bucket, key string, body []byte) (string, error) { |
| 83 | ctx, cancel, err := s.request(ctx) |
| 84 | if err != nil { |
| 85 | return "", err |
| 86 | } |
| 87 | defer cancel() |
| 88 | return s.Store.PutIfAbsent(ctx, bucket, key, body) |
| 89 | } |
| 90 | |
| 91 | type requestReader struct { |
| 92 | io.ReadCloser |
| 93 | cancel context.CancelFunc |
| 94 | once sync.Once |
| 95 | } |
| 96 | |
| 97 | func (r *requestReader) Close() error { err := r.ReadCloser.Close(); r.once.Do(r.cancel); return err } |
| 98 | |
| 99 | var _ lease.VersionedStore = RequestStore{} |
| 100 | |
amadan