if (useEcsFormat) {
            printByEcs(valueMap);
        } else {
            printByLtsv(valueMap);
        }
    }

    protected void printByLtsv(final Map<String, String> valueMap) {
        printLog(valueMap.entrySet().stream().map(e -> e.getKey() + ":" + e.getValue()).collect(Collectors.joining("\t")));
    }

    protected void printByEcs(final Map<String, String> valueMap) {