sync_manager.rb

  def start_replication
    @pull = @database.createPullReplication(sync_url)
    @pull.continuous = true

    @push = @database.createPushReplication(sync_url)
    @push.continuous = true

    listen_for_replication_events @pull
    listen_for_replication_events @push

    authenticator.register_credentials_for_replications [@push, @pull]

    # re-start the replications
    @pull.stop
    @pull.start
    @push.stop
    @push.start
  end