private List<String> splitChannelName(String channelName) {
        List<String> fileMetricList = new ArrayList<String>();
        if (StringUtils.isNotBlank(channelName)) {
            fileMetricList = Arrays.asList(channelName.split("\\s+"));
        }
        return fileMetricList;
    }
split channel name into name list.

@param channelName - channel name
@return - name list
inlong-dataproxy/dataproxy-source/src/main/java/org/apache/inlong/dataproxy/channel/FailoverChannelSelector.java