On Monday, September 25, 2017 at 7:57:01 AM UTC+2, Patrik Nordwall wrote:
>
> Event adapter is the recommended way to add tags, to keep the logic in the
> actor free from this event consuming aspect.
Thank you for the answer. The problem I have with tagging in an
*EventAdapter* is that I need different tags for different actors (and even
for different instances of the same actor) and this means that tags for
*StateChangeEvent* can only be extracted parsing the state identifier
string, which I believe is not ideal. For standard persistent actors we add
tags directly when persisting the event (given an instance of an actor all
events receive the same tags, so we have a trait with a custom "persist"
function that adds the tags). Any suggestion on how to derive tags in other
ways is welcome :-)
Tomassino
P.S.: The reason why I have to tag state changes is that I'm using
akka-persistence-cassandra with the *delayed-event-timeout* to a value
different from 0, which basically means that all persisted events with the
same persistence id must have the same tags, otherwise the query fails.
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