| 1 | package extension |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "sync" |
| 6 | "time" |
| 7 | ) |
| 8 | |
| 9 | // LifecycleRegistry tracks component lifecycle states for one published |
| 10 | // generation. It is diagnostic-first: doctor and UI read it; activation code |
| 11 | // advances states through Transition. |
| 12 | type LifecycleRegistry struct { |
| 13 | mu sync.Mutex |
| 14 | generation uint64 |
| 15 | states map[ComponentID]*ComponentStatus |
| 16 | } |
| 17 | |
| 18 | // NewLifecycleRegistry returns an empty registry for generation. |
| 19 | func NewLifecycleRegistry(generation uint64) *LifecycleRegistry { |
| 20 | return &LifecycleRegistry{ |
| 21 | generation: generation, |
| 22 | states: make(map[ComponentID]*ComponentStatus), |
| 23 | } |
| 24 | } |
| 25 | |
| 26 | // Generation returns the bound generation. |
| 27 | func (r *LifecycleRegistry) Generation() uint64 { |
| 28 | if r == nil { |
| 29 | return 0 |
| 30 | } |
| 31 | return r.generation |
| 32 | } |
| 33 | |
| 34 | // Ensure registers id in Inactive if missing. |
| 35 | func (r *LifecycleRegistry) Ensure(id ComponentID) { |
| 36 | if r == nil || id == "" { |
| 37 | return |
| 38 | } |
| 39 | r.mu.Lock() |
| 40 | defer r.mu.Unlock() |
| 41 | if _, ok := r.states[id]; !ok { |
| 42 | r.states[id] = &ComponentStatus{ |
| 43 | ID: id, |
| 44 | State: ComponentInactive, |
| 45 | Generation: r.generation, |
| 46 | UpdatedAt: time.Now().UTC(), |
| 47 | } |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | // Transition advances a component to next when the transition is legal. |
| 52 | // Illegal transitions return an error and leave state unchanged. |
| 53 | func (r *LifecycleRegistry) Transition(id ComponentID, next ComponentState, diag string) error { |
| 54 | if r == nil { |
| 55 | return fmt.Errorf("extension: nil lifecycle registry") |
| 56 | } |
| 57 | r.mu.Lock() |
| 58 | defer r.mu.Unlock() |
| 59 | cur, ok := r.states[id] |
| 60 | if !ok { |
| 61 | cur = &ComponentStatus{ID: id, State: ComponentInactive, Generation: r.generation} |
| 62 | r.states[id] = cur |
| 63 | } |
| 64 | if !legalTransition(cur.State, next) { |
| 65 | return fmt.Errorf("extension: illegal lifecycle transition %s: %s -> %s", id, cur.State, next) |
| 66 | } |
| 67 | cur.State = next |
| 68 | cur.UpdatedAt = time.Now().UTC() |
| 69 | if diag != "" { |
| 70 | cur.Diagnostics = append(cur.Diagnostics, diag) |
| 71 | } |
| 72 | if next == ComponentFailed && diag != "" { |
| 73 | cur.Error = diag |
| 74 | } |
| 75 | return nil |
| 76 | } |
| 77 | |
| 78 | // Fail marks the component Failed with error text. |
| 79 | func (r *LifecycleRegistry) Fail(id ComponentID, err error) { |
| 80 | msg := "" |
| 81 | if err != nil { |
| 82 | msg = err.Error() |
| 83 | } |
| 84 | _ = r.Transition(id, ComponentFailed, msg) |
| 85 | } |
| 86 | |
| 87 | // Status returns a copy of one component status. |
| 88 | func (r *LifecycleRegistry) Status(id ComponentID) (ComponentStatus, bool) { |
| 89 | if r == nil { |
| 90 | return ComponentStatus{}, false |
| 91 | } |
| 92 | r.mu.Lock() |
| 93 | defer r.mu.Unlock() |
| 94 | s, ok := r.states[id] |
| 95 | if !ok { |
| 96 | return ComponentStatus{}, false |
| 97 | } |
| 98 | cp := *s |
| 99 | cp.Diagnostics = append([]string(nil), s.Diagnostics...) |
| 100 | return cp, true |
| 101 | } |
| 102 | |
| 103 | // All returns a snapshot of every component status. |
| 104 | func (r *LifecycleRegistry) All() []ComponentStatus { |
| 105 | if r == nil { |
| 106 | return nil |
| 107 | } |
| 108 | r.mu.Lock() |
| 109 | defer r.mu.Unlock() |
| 110 | out := make([]ComponentStatus, 0, len(r.states)) |
| 111 | for _, s := range r.states { |
| 112 | cp := *s |
| 113 | cp.Diagnostics = append([]string(nil), s.Diagnostics...) |
| 114 | out = append(out, cp) |
| 115 | } |
| 116 | return out |
| 117 | } |
| 118 | |
| 119 | // RuntimeStatus builds the host-facing status document. |
| 120 | func (r *LifecycleRegistry) RuntimeStatus(plan *RuntimePlan, receipts []EffectReceipt) *RuntimeStatus { |
| 121 | if r == nil { |
| 122 | return nil |
| 123 | } |
| 124 | return &RuntimeStatus{ |
| 125 | PublishedGeneration: r.generation, |
| 126 | Components: r.All(), |
| 127 | Plan: PlanView(plan), |
| 128 | Receipts: receipts, |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | func legalTransition(from, to ComponentState) bool { |
| 133 | if from == to { |
| 134 | return true |
| 135 | } |
| 136 | switch from { |
| 137 | case ComponentInactive: |
| 138 | return to == ComponentPreparing || to == ComponentFailed |
| 139 | case ComponentPreparing: |
| 140 | return to == ComponentActive || to == ComponentFailed || to == ComponentInactive |
| 141 | case ComponentActive: |
| 142 | return to == ComponentDraining || to == ComponentFailed |
| 143 | case ComponentDraining: |
| 144 | return to == ComponentInactive || to == ComponentFailed |
| 145 | case ComponentFailed: |
| 146 | return to == ComponentInactive || to == ComponentPreparing |
| 147 | default: |
| 148 | return false |
| 149 | } |
| 150 | } |
| 151 |