event-sourcing

Event sourcing implementation with PostgreSQL, EventStoreDB, and DynamoDB is supported by configuring the specific event store client. You define aggregate boundaries, emit domain events, and use the appropriate database driver to store immutable state changes.

Snapshotting in event sourcing is a strategy for efficient state reconstruction by periodically saving the current aggregate state. You need it when an aggregate accumulates a large number of domain events, making full event replay too slow for system recovery.

Designing aggregates and domain events for DDD involves defining clear aggregate boundaries to enforce invariants. You establish domain event naming conventions, determine required fields, and set emission rules to ensure your system records every state change accurately.

Handle schema evolution by implementing strategies to manage changes in event structure over time, and ensure idempotency by using idempotency keys and deduplication. This guarantees reliable event processing and prevents duplicate state changes in your event store.

The best way to build an auditable system is using event sourcing patterns where every state change is recorded as an immutable domain event. This approach allows for complete audit trails, easy failure recovery, and reconstruction of past states.

Yes, you can use asyncpg and esdbclient to build event store infrastructure. These dependencies facilitate asynchronous database connections and EventStoreDB client interactions, enabling resilient and auditable systems with robust event processing capabilities.