public synchronized BootStrapStatus getStatus(long requestId) {
    if (! bsStatus.containsKey(Long.valueOf(requestId))) {
      return null;
    }
    return bsStatus.get(Long.valueOf(requestId));
  }
Return {@link BootStrapStatus} for a given responseId.
@param requestId the responseId for which the status needs to be returned.
@return status for a specific response id. A response Id of -1 means the
latest responseId.
ambari-server/src/main/java/org/apache/ambari/server/bootstrap/BootStrapImpl.java