break;
            case "appendJvmStats":
                hasAppendJvmStats = true;
                assertEquals("appendJvmStats should take StringBuilder parameter", 1, method.getParameterCount());
                assertEquals("appendJvmStats should take StringBuilder", StringBuilder.class, method.getParameterTypes()[0]);
                break;

        appendOsStats(buf);
        appendProcessStats(buf);
        appendJvmStats(buf);
        appendFesenStats(buf);

        appendTimestamp(buf);
        buf.append('}');

        if (logger.isInfoEnabled()) {
            logger.info(buf.toString());
        }
    }

    private void appendJvmStats(final StringBuilder buf) {
        buf.append("\"jvm\":{");