Hi Richard,
mapping event/message versions is best done in custom serializers
<http://doc.akka.io/docs/akka/2.3.0-RC4/scala/persistence.html#custom-serialization>.
You can use protobuf or a similar library of your choice to read events
in a backwards compatible way. In the same way you can also use custom
serializers for snapshots. Ignoring events from a message stream
(filtering) or aggregating events cannot be done on serializer level.
This must be done on (eventsourced) processor level.
Cheers,
Martin
On 26.02.14 18:53, Richard Rodseth wrote:
Now that we're getting excited about using akka persistence for
event-sourced DDD applications, can anyone provide any insights or
resources about handling versioning? Anything specific to akka
persistence? For example I have a book (produced by Microsoft) that
talks about mapping/filtering events in the infrastructure before they
reach the domain. How would we do that with akka persistence?
Thanks in advance.
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