Cajun

A pluggable actor system written in java leveraging modern features from JDK21+

An actor is a concurrent unit of computation which guarantees serial processing of messages with no need for state synchronization and coordination. This guarantee of actors mainly comes from the way actors communicate with each other, each actor send asynchronous messages to other actors and each actor only reads messages from its mailbox.

Github Repository: https://github.com/CajunSystems/cajun

Demo Link: https://www.loom.com/share/e8b71ca24ba04dccb1eab77252ec196b?sid=2eaf8cbf-8351-4467-9158-54524fef9029

Feature roadmap

1. Actor system and actor lifecycle

   • Create Actor and Actor System - Done

   • Support message to self for actor - Done

   • Support hooks for start and shutdown of actor - Done

   • Timed messages - Done

2. Actor metadata management with etcd - In Progress

3. Actor supervision hierarchy and fault tolerance - Not Started

4. Persistent state and messaging for actors - Not Started

5. Partitioned state and sharding strategy - Not Started