Different entry actors under a ShardRegion

[Yifei]

The use case is that I have production version and development version of an actor

I want to route some traffic of this shardregion to dev actors

Can I spawn different entry actors(pod and dev) according to the shardId/actorId under a shardregion?

Thanks

[Justin du coeur]

Patrik is the expert, but looking at the API and code as it currently stands, I doubt it.  To make this possible seems like it would require some restructuring of Cluster Sharding so that you could pass in a "PropsExtractor", corresponding to the Shard and Id Extractors, which would return different Props depending on the message.  Not rocket science, but it's a fairly esoteric requirement, so I don't know how high a priority it would be.

If you really need it, I suspect you could fork Cluster Sharding to make it happen, and suggest a possible PR...

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[Yifei]

Thanks Justin,

If Akka doesn't support different actors under a shard region, Can I overwrite ShardCoordinator and define the routing logic in the coordinator?

For example, perhaps I can launch two ShardRegions such as SR and SR_DEV, the coordinator of SR redirects the message id ended with 0 to 20 to SR_DEV

Thanks

[Patrik Nordwall]

Perhaps use an intermediate actor as the entity actor and it can route messages to child prod/dev actors?

Or use an intermediate actor in front of two different shard region actors and it can route the messages to the appropriate prod/dev shard region?

/Patrik

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/Patrik