Prakhyat, I use something like the following code, (greatly simplied), for
starting a view from a specific sequence number:
package demo
import scala.concurrent.duration._
import akka.actor.{ActorLogging, ActorRef, Props}
import akka.persistence.PersistentView
object CatchUp {
case class Settings( fromSeqNr: Long = 1L, maxBufferSize: Int = 100,
idle: Option[FiniteDuration]) {
require(fromSeqNr > 0L, "fromSeqNr must be > 0")
require(maxBufferSize > 0, "maxBufferSize must be > 0")
}
}
trait CatchUp extends PersistentView with ActorLogging {
import CatchUp._
def settings: Settings
def receive: Receive = ???
override def lastSequenceNr: Long =
math.max(settings.fromSequenceNr - 1L, super.lastSequenceNr)
override def autoUpdateInterval: FiniteDuration =
settings.idle.getOrElse(super.autoUpdateInterval)
override def autoUpdateReplayMax: Long =
settings.maxBufferSize
}
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