How to use

timestampAsIsoString

method

in

org.stagemonitor.util.StringUtils

public String getEnd() {
  if (endTimestamp > 0) {
    return StringUtils.timestampAsIsoString(endTimestamp);
  }
  return null;
}

public String getStart() {
  return StringUtils.timestampAsIsoString(startTimestamp);
}

final String timestamp = StringUtils.timestampAsIsoString(span.getStartTimestampMillis());
gen.writeStringField("@timestamp", timestamp);
gen.writeEndObject();