Cluster sharding: Expose entity ID to the sharded actor
#24.053 aperta il 23 nov 2017
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Apologies in advance if this issue was brought up in the past. I tried to search for it, but couldn't find anything...
Currently, sharded actors don't have access to their entity identifier. The example in the docs uses self.path.name, but that is URL-encoded and not the actual ID. On top of that, this seems to be an implementation detail - the encoded ID happens to be what the shard uses for the actor name. At the same time, it is obvious that adding an Actor.entityId method is not a good solution (actors don't know whether or not they're sharded).
So I suggest modifying the ClusterSharding.start (or adding another API next to it) so that instead of taking Props as a parameter, it would take a String => Props function that would get invoked with the entity ID. What do you think?
(Of course, I wouldn't mind doing a PR for it, if there's interest)