The underlying technology of Command message delivery

[teiaslyor]

I've noticed that the CommandService is part of the CSW framework and it provides a set of methods for interacting with components through commands.

I've also noticed that the EventService uses Kafka or Redis for event delivery, and the AlarmService invokes Redis.

However, I'm having some difficulties in understanding the underlying technologies used for Command message delivery. Is Kafka or Redis used for the delivery of commands?

Could you please offer me some help?

[abrighton]

The CommandService uses akka actor messages for the implementation (up until csw-5.x. csw-6.x, which is still in progress, uses pekko instead, due to akka license issues).
On top of the akka/pekko actor API , an HTTP API is also provided.