public void setOriginalTimestamp(Long originalTimestamp) {
    this.originalTimestamp = originalTimestamp;
  }
Sets the time, in milliseconds, when the alert was first received with the
current state.

@param originalTimestamp
         the time of the first instance of this alert (not {@code null}).
ambari-server/src/main/java/org/apache/ambari/server/orm/entities/AlertCurrentEntity.java