kestrel

Simple DDD toolkit for Kotlin

TODO

• Complete the reactive refactor
  • Testing different failure scenarios
  • Add reporters back in
• General testing
  • HTTP event sources
  • Database backend
  • Projections
• Stateful process manager support
  • Should have snapshotting support too
• Switch stateless process manager to be similar to stateful one (e.g. explicit domain service dependency)
• Register (stateless) process managers with application rather than start themselves
• Eventually consistent (async) DB projections (db offset manager)
• Support for dry run command handling (i.e. handle command but don't persist events)
• Utilise Reactor metrics to gather useful metrics
• Type-safe SQL string builder (maybe fork initially from Ktorm)
• Support for storing events not tied to aggregates
• Simple non-event sourced aggregate support
  • Simple command handling (no behaviours)
  • State serialisation (Object -> DB). ORM...
  • Optional event generation
  • Should be able to re-use most of existing code
• Kestrel application bootstrap module (e.g. KestrelRdbmsApplication)
• Debezium + Kafka/Kinesis stream support
• Default JSON mapper functionality for v1 of events? Or maybe at least code generation?
• Create CLI toolbelt for auto generation of skeleton code
• Document need for adequate indexes on domain_event table
• Websocket events subscriptions and streams - abstract difference between fetching straight from backend store or via external stream (kafka/kinesis)
  • Transparent leader election to prevent multiple subscriptions receiving duplicates
• Command deduplication - remember and return prior rejections