public void saveData()

in src/main/java/org/apache/rocketmq/dashboard/task/DashboardCollectTask.java [170:218]
44 lines of code
6 McCabe index (conditional complexity)

    public void saveData() {
        if (!rmqConfigure.isEnableDashBoardCollect()) {
            return;
        }
        //one day refresh cache one time
        String dataLocationPath = rmqConfigure.getDashboardCollectData();
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        String nowDateStr = format.format(new Date());
        String currentDateStr = format.format(currentDate);
        if (!currentDateStr.equals(nowDateStr)) {
            dashboardCollectService.getBrokerMap().invalidateAll();
            dashboardCollectService.getTopicMap().invalidateAll();
            currentDate = new Date();
        }
        File brokerFile = new File(dataLocationPath + nowDateStr + ".json");
        File topicFile = new File(dataLocationPath + nowDateStr + "_topic" + ".json");
        try {
            Map<String, List<String>> brokerFileMap;
            Map<String, List<String>> topicFileMap;
            if (brokerFile.exists()) {
                brokerFileMap = dashboardCollectService.jsonDataFile2map(brokerFile);
            }
            else {
                brokerFileMap = Maps.newHashMap();
                Files.createParentDirs(brokerFile);
            }

            if (topicFile.exists()) {
                topicFileMap = dashboardCollectService.jsonDataFile2map(topicFile);
            }
            else {
                topicFileMap = Maps.newHashMap();
                Files.createParentDirs(topicFile);
            }

            brokerFile.createNewFile();
            topicFile.createNewFile();

            writeFile(dashboardCollectService.getBrokerMap(), brokerFileMap, brokerFile);
            writeFile(dashboardCollectService.getTopicMap(), topicFileMap, topicFile);
            log.debug("Broker Collected Data in memory = {}" + JsonUtil.obj2String(dashboardCollectService.getBrokerMap().asMap()));
            log.debug("Topic Collected Data in memory = {}" + JsonUtil.obj2String(dashboardCollectService.getTopicMap().asMap()));

        }
        catch (IOException e) {
            Throwables.throwIfUnchecked(e);
            throw new RuntimeException(e);
        }
    }