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Author SHA1 Message Date
Hugo Nijhuis
02847bdaf5 Add event versioning validation
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- Add ErrVersionConflict error type and VersionConflictError for detailed
  conflict information
- Implement version validation in InMemoryEventStore.SaveEvent that rejects
  events with version <= current latest version
- Implement version validation in JetStreamEventStore.SaveEvent with version
  caching for performance
- Add comprehensive tests for version conflict detection including concurrent
  writes to same actor
- Document versioning semantics in EventStore interface and CLAUDE.md

This ensures events have monotonically increasing versions per actor and
provides clear error messages for version conflicts, enabling optimistic
concurrency control patterns.

Closes #6

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
 2026-01-09 17:56:50 +01:00
Hugo Nijhuis
a269da4520 [Issue #4] Add SnapshotStore unit tests (#31)
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2026-01-09 16:37:23 +00:00
Hugo Nijhuis
032fda41ce Add comprehensive unit tests for InMemoryEventStore
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- Test SaveEvent persists events correctly (single, multiple, multi-actor)
- Test GetEvents retrieves events in insertion order
- Test GetEvents with fromVersion filtering
- Test GetLatestVersion returns correct version
- Test behavior with non-existent actor IDs (returns empty/zero)
- Test concurrent access safety with race detector
- Add mutex protection to InMemoryEventStore for thread safety

Closes #3

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
 2026-01-09 17:14:18 +01:00
Hugo Nijhuis
e9e50c021f Initial aether repository structure
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Distributed actor system with event sourcing for Go:
- event.go - Event, ActorSnapshot, EventStore interface
- eventbus.go - EventBus, EventBroadcaster for pub/sub
- nats_eventbus.go - NATS-backed cross-node event broadcasting
- store/ - InMemoryEventStore (testing), JetStreamEventStore (production)
- cluster/ - Node discovery, leader election, shard distribution
- model/ - EventStorming model types

Extracted from arcadia as open-source infrastructure component.

Co-Authored-By: Claude <noreply@anthropic.com>
 2026-01-08 19:30:02 +01:00