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61e9408261
Registry is now keyed by stable ReplicaID, not by address.
DataAddr changes preserve sender identity — the core V2 invariant.
Changes:
- ReplicaAssignment{ReplicaID, Endpoint} replaces map[string]Endpoint
- AssignmentIntent.Replicas uses []ReplicaAssignment
- Registry.Reconcile takes []ReplicaAssignment
- Tests use stable IDs ("replica-1", "r1") independent of addresses
New test: ChangedDataAddr_PreservesSenderIdentity
- Same ReplicaID, different DataAddr (10.0.0.1 → 10.0.0.2)
- Sender pointer preserved, session invalidated, new session attached
- This is the exact V1/V1.5 regression that V2 must fix
doc.go: clarified Slice 1 core vs carried-forward files
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
28 lines
1.3 KiB
Go
28 lines
1.3 KiB
Go
// Package replication implements V2 per-replica sender/session ownership.
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//
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// This is the real V2 engine core, promoted from the prototype at
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// sw-block/prototype/enginev2/. It preserves all accepted invariants:
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//
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// - One stable Sender per replica, identified by ReplicaID
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// - One active Session per replica per epoch
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// - Session identity fencing: stale sessionID rejected at every execution API
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// - Endpoint change invalidates active session
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// - Epoch bump invalidates all stale-epoch sessions
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// - Catch-up is bounded (frozen target, budget enforcement)
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// - Rebuild is a separate, exclusive sender-owned execution path
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// - Completion requires convergence (catch-up) or ReadyToComplete (rebuild)
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//
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// File layout:
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//
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// Slice 1 core (ownership/fencing):
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// types.go — Endpoint, ReplicaState, SessionKind, SessionPhase
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// sender.go — Sender: per-replica owner with execution APIs
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// session.go — Session: recovery lifecycle with FSM phases
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// registry.go — Registry: sender group with reconcile + assignment intent
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//
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// Carried forward from prototype (accepted in Phase 4.5):
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// budget.go — CatchUpBudget: bounded catch-up enforcement
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// rebuild.go — RebuildState: rebuild execution FSM
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// outcome.go — HandshakeResult, RecoveryOutcome classification
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package replication
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