for (Method method : methods) {
            switch (method.getName()) {
            case "appendOsStats":
                hasAppendOsStats = true;
                assertEquals("appendOsStats should take StringBuilder parameter", 1, method.getParameterCount());
                assertEquals("appendOsStats should take StringBuilder", StringBuilder.class, method.getParameterTypes()[0]);
                break;

        super();
    }

    @Override
    public void expired() {
        final StringBuilder buf = new StringBuilder(1000);

        buf.append("[SYSTEM MONITOR] ");
        buf.append('{');

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

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

        if (logger.isInfoEnabled()) {