context-become-sample.scala

class AccountActor extends Actor { 
  def receive = initializing
  
  def initializing: Receive = {
    case account: AccountDetails =>
      context.become(active(account))
  }
  
  def active(account: AccountDetails): Receive = {
    case update: AccountDetails =>
      logger.info("Account details have been updated")
      context.become(active(account))
  }
}