public void setAlertTarget(AlertTargetEntity alertTarget) {
    this.alertTarget = alertTarget;
    alertTarget.addAlertNotice(this);
  }
Sets the intended audience for the notification.

@param alertTarget
         the recipient of this notification (not {@code null}).
ambari-server/src/main/java/org/apache/ambari/server/orm/entities/AlertNoticeEntity.java