| 1 | package control |
| 2 | |
| 3 | import ( |
| 4 | "reasonix/internal/event" |
| 5 | "reasonix/internal/extension" |
| 6 | ) |
| 7 | |
| 8 | // RuntimePhase is the observable publish/drain phase for this controller. |
| 9 | type RuntimePhase string |
| 10 | |
| 11 | const ( |
| 12 | RuntimePhaseActive RuntimePhase = "Active" |
| 13 | RuntimePhaseDraining RuntimePhase = "Draining" |
| 14 | RuntimePhaseUnknown RuntimePhase = "Unknown" |
| 15 | ) |
| 16 | |
| 17 | // SetRuntimeGeneration binds turn admission to the extension PublishGate. |
| 18 | // Zero clears generation-based admission. |
| 19 | func (c *Controller) SetRuntimeGeneration(gen uint64) { |
| 20 | if c == nil { |
| 21 | return |
| 22 | } |
| 23 | c.mu.Lock() |
| 24 | c.runtimeGeneration = gen |
| 25 | c.mu.Unlock() |
| 26 | } |
| 27 | |
| 28 | // RuntimeGeneration returns the generation this controller serves. |
| 29 | func (c *Controller) RuntimeGeneration() uint64 { |
| 30 | if c == nil { |
| 31 | return 0 |
| 32 | } |
| 33 | c.mu.Lock() |
| 34 | defer c.mu.Unlock() |
| 35 | return c.runtimeGeneration |
| 36 | } |
| 37 | |
| 38 | // RuntimeOwner returns the lifecycle owner for this controller lineage. |
| 39 | func (c *Controller) RuntimeOwner() *extension.RuntimeOwner { |
| 40 | if c == nil { |
| 41 | return runtimeOwnerOrDefault(nil) |
| 42 | } |
| 43 | return runtimeOwnerOrDefault(c.runtimeOwner) |
| 44 | } |
| 45 | |
| 46 | func runtimeOwnerOrDefault(owner *extension.RuntimeOwner) *extension.RuntimeOwner { |
| 47 | return extension.RuntimeOwnerOrDefault(owner) |
| 48 | } |
| 49 | |
| 50 | // RuntimePhase reports Active when this generation is published, Draining |
| 51 | // when superseded, Unknown when generation tracking is disabled. |
| 52 | func (c *Controller) RuntimePhase() RuntimePhase { |
| 53 | if c == nil { |
| 54 | return RuntimePhaseUnknown |
| 55 | } |
| 56 | gen := c.RuntimeGeneration() |
| 57 | if gen == 0 { |
| 58 | return RuntimePhaseUnknown |
| 59 | } |
| 60 | gate := c.RuntimeOwner().Gate |
| 61 | if gate.Published() == gen { |
| 62 | return RuntimePhaseActive |
| 63 | } |
| 64 | if gate.IsDraining(gen) || gate.IsStale(gen) { |
| 65 | return RuntimePhaseDraining |
| 66 | } |
| 67 | return RuntimePhaseUnknown |
| 68 | } |
| 69 | |
| 70 | func (c *Controller) rejectDrainingGenerationLocked() bool { |
| 71 | gen := c.runtimeGeneration |
| 72 | if gen == 0 || c.RuntimeOwner().Gate.AdmitNewWork(gen) { |
| 73 | return false |
| 74 | } |
| 75 | extension.DefaultLifecycleMetrics.AdmissionRejected.Add(1) |
| 76 | return true |
| 77 | } |
| 78 | |
| 79 | func (c *Controller) emitDrainingNotice() { |
| 80 | if c == nil { |
| 81 | return |
| 82 | } |
| 83 | c.sink.Emit(event.Event{Kind: event.Notice, Level: event.LevelWarn, Text: "input was not accepted: runtime is draining after rebuild — please resend"}) |
| 84 | } |
| 85 | |
| 86 | // LastResumeDecision returns the most recent DecideResume result from |
| 87 | // checkpoint open (zero value when never assessed). |
| 88 | func (c *Controller) LastResumeDecision() extension.ResumeDecision { |
| 89 | if c == nil { |
| 90 | return extension.ResumeDecision{} |
| 91 | } |
| 92 | c.mu.Lock() |
| 93 | defer c.mu.Unlock() |
| 94 | return c.lastResumeDecision |
| 95 | } |
| 96 | |
| 97 | // AssessResume runs DecideResume for the controller's generation. Recovery |
| 98 | // and doctor use this to refuse claiming clean rollback after irreversible |
| 99 | // external work. |
| 100 | func (c *Controller) AssessResume() extension.ResumeDecision { |
| 101 | if c == nil { |
| 102 | return extension.ResumeDecision{AllowResume: true, CleanRollback: true} |
| 103 | } |
| 104 | gen := c.RuntimeGeneration() |
| 105 | if gen == 0 { |
| 106 | gen = c.RuntimeOwner().Gate.Published() |
| 107 | } |
| 108 | d := c.RuntimeOwner().DecideResume(gen) |
| 109 | c.mu.Lock() |
| 110 | c.lastResumeDecision = d |
| 111 | c.mu.Unlock() |
| 112 | return d |
| 113 | } |
| 114 |