| 1 | package hostbox |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "encoding/json" |
| 6 | "github.com/carlosframework/platform/internal/hostguard" |
| 7 | "github.com/carlosframework/platform/internal/registry" |
| 8 | ) |
| 9 | |
| 10 | type InventoryExpectation struct { |
| 11 | Revision uint64 |
| 12 | RecordKey, RecordETag string |
| 13 | Target hostguard.FenceTarget |
| 14 | } |
| 15 | |
| 16 | func (d *StopInventoryDB) Snapshot(ctx context.Context, host string, captured hostguard.Captured) (StopInventory, uint64, error) { |
| 17 | if d == nil { |
| 18 | return StopInventory{}, 0, ErrUnsupported |
| 19 | } |
| 20 | target := hostguard.FenceTarget{Host: host, Incarnation: captured.Incarnation, Stamp: captured.Stamp} |
| 21 | var out JournalResponse |
| 22 | var err error |
| 23 | if d.remote != nil { |
| 24 | out, err = journalCall(ctx, d.remote, JournalRequest{Op: "inventory-version", Target: target}) |
| 25 | } else { |
| 26 | out, err = d.inventoryVersion(ctx, target) |
| 27 | } |
| 28 | return out.Inventory, out.Revision, err |
| 29 | } |
| 30 | |
| 31 | type TimerMutation struct { |
| 32 | Timer registry.Timer |
| 33 | Expected string |
| 34 | Remove bool |
| 35 | } |
| 36 | |
| 37 | func (d *StopInventoryDB) WriteTimerExpected(ctx context.Context, in StopInventory, expected InventoryExpectation, timer TimerMutation) (uint64, error) { |
| 38 | return d.writeExpected(ctx, in, expected, &timer) |
| 39 | } |
| 40 | func (d *StopInventoryDB) WriteExpected(ctx context.Context, in StopInventory, expected InventoryExpectation) (uint64, error) { |
| 41 | return d.writeExpected(ctx, in, expected, nil) |
| 42 | } |
| 43 | func (d *StopInventoryDB) writeExpected(ctx context.Context, in StopInventory, expected InventoryExpectation, timer *TimerMutation) (uint64, error) { |
| 44 | if d == nil || d.remote == nil || expected.Target.Host != in.Host || expected.Target.Incarnation != in.Incarnation || expected.Target.Stamp != in.InstallationStamp { |
| 45 | return 0, ErrTypedInventory |
| 46 | } |
| 47 | out, err := journalCall(ctx, d.remote, JournalRequest{Timer: timer, Op: "inventory-write", Inventory: in, Revision: expected.Revision, Target: expected.Target, RecordKey: expected.RecordKey, RecordETag: expected.RecordETag}) |
| 48 | if err != nil { |
| 49 | return 0, err |
| 50 | } |
| 51 | if out.Revision != expected.Revision+1 { |
| 52 | return 0, ErrChanged |
| 53 | } |
| 54 | return out.Revision, nil |
| 55 | } |
| 56 | |
| 57 | func (d *StopInventoryDB) Remote() bool { return d != nil && d.remote != nil } |
| 58 | |
| 59 | func (d *StopInventoryDB) SnapshotRequest(ctx context.Context, target hostguard.FenceTarget) (JournalResponse, error) { |
| 60 | if d == nil { |
| 61 | return JournalResponse{}, ErrUnsupported |
| 62 | } |
| 63 | if d.remote != nil { |
| 64 | return journalCall(ctx, d.remote, JournalRequest{Op: "inventory-version", Target: target}) |
| 65 | } |
| 66 | return d.inventoryVersion(ctx, target) |
| 67 | } |
| 68 | |
| 69 | func (m TimerMutation) MarshalJSON() ([]byte, error) { |
| 70 | type wire TimerMutation |
| 71 | return json.Marshal(struct { |
| 72 | wire |
| 73 | Registration string |
| 74 | }{wire(m), m.Timer.Registration}) |
| 75 | } |
| 76 | func (m *TimerMutation) UnmarshalJSON(raw []byte) error { |
| 77 | type wire TimerMutation |
| 78 | var v struct { |
| 79 | wire |
| 80 | Registration string |
| 81 | } |
| 82 | if err := json.Unmarshal(raw, &v); err != nil { |
| 83 | return err |
| 84 | } |
| 85 | *m = TimerMutation(v.wire) |
| 86 | m.Timer.Registration = v.Registration |
| 87 | return nil |
| 88 | } |
| 89 | |
amadan