@Override
  public int hashCode() {
    int result = clusterName != null ? clusterName.hashCode() : 0;
    result = 31 * result + (endTime != null ? endTime.hashCode() : 0);
    result = 31 * result + (requestId != null ? requestId.hashCode() : 0);
    result = 31 * result + (progressPercent != null ? progressPercent.hashCode() : 0);
    result = 31 * result + (requestContext != null ? requestContext.hashCode() : 0);
    result = 31 * result + (requestStatus != null ? requestStatus.hashCode() : 0);
    result = 31 * result + (startTime != null ? startTime.hashCode() : 0);
    result = 31 * result + (userName != null ? userName.hashCode() : 0);
    result = 31 * result + (hostRoleCommands != null ? hostRoleCommands.hashCode() : 0);
    return result;
  }
Contains info about request update. This update will be sent to all subscribed recipients.
ambari-server/src/main/java/org/apache/ambari/server/events/RequestUpdateEvent.java