Amazon Keyspaces

Amazon Keyspaces is an Amazon service that provides a Cassandra-like API, but it’s not real Cassandra and has different behaviour for some things (for example atomic persist of several events is not possible).

Keyspaces is known not to work on akka-persistence-cassandra version 1.0.3 and earlier.

Configuration

Configure the authentication plugin in application.conf:

datastax-java-driver { 
  basic.contact-points = [ "cassandra.eu-central-1.amazonaws.com:9142"]
  basic.request.consistency = LOCAL_QUORUM
  basic.load-balancing-policy {
    class = DefaultLoadBalancingPolicy
    local-datacenter = eu-central-1
  }
  profiles {
     akka-persistence-cassandra-profile {
        basic.request.consistency = LOCAL_QUORUM
     }
  }   
  advanced {
    auth-provider = {
      class = software.aws.mcs.auth.SigV4AuthProvider
      aws-region = eu-central-1
    }
    ssl-engine-factory {
      class = DefaultSslEngineFactory
      truststore-path = "cassandra_truststore.jks"
      truststore-password = "my_password"
      hostname-validation = false      
    }
  }
}

Note that the contact points must also be configured. You find the endpoints for different regions at https://docs.aws.amazon.com/keyspaces/latest/devguide/programmatic.endpoints.html

Notes

Keyspace and table creation are asynchronous and not finished when the returned Future is completed, so it is best to create the tables and keyspaces manually before deploying your application.