public void setLatestTimestamp(Long latestTimestamp) {
    this.latestTimestamp = latestTimestamp;
  }
Sets the time, in millis, that the last instance of this alert state was
received.

@param latestTimestamp
         the time of the most recently received alert data for this
         instance (never {@code null}).
ambari-server/src/main/java/org/apache/ambari/server/orm/entities/AlertCurrentEntity.java