private LatencyStats initializeLatencyStats()

in flink-ml-iteration/flink-ml-iteration-1.15/src/main/java/org/apache/flink/iteration/operator/perround/AbstractPerRoundWrapperOperator.java [510:555]

45 lines of code
4 McCabe index (conditional complexity)


    private LatencyStats initializeLatencyStats() {
        try {
            Configuration taskManagerConfig =
                    containingTask.getEnvironment().getTaskManagerInfo().getConfiguration();
            int historySize = taskManagerConfig.getInteger(MetricOptions.LATENCY_HISTORY_SIZE);
            if (historySize <= 0) {
                LOG.warn(
                        "{} has been set to a value equal or below 0: {}. Using default.",
                        MetricOptions.LATENCY_HISTORY_SIZE,
                        historySize);
                historySize = MetricOptions.LATENCY_HISTORY_SIZE.defaultValue();
            }

            final String configuredGranularity =
                    taskManagerConfig.getString(MetricOptions.LATENCY_SOURCE_GRANULARITY);
            LatencyStats.Granularity granularity;
            try {
                granularity =
                        LatencyStats.Granularity.valueOf(
                                configuredGranularity.toUpperCase(Locale.ROOT));
            } catch (IllegalArgumentException iae) {
                granularity = LatencyStats.Granularity.OPERATOR;
                LOG.warn(
                        "Configured value {} option for {} is invalid. Defaulting to {}.",
                        configuredGranularity,
                        MetricOptions.LATENCY_SOURCE_GRANULARITY.key(),
                        granularity);
            }
            MetricGroup jobMetricGroup = this.metrics.getJobMetricGroup();
            return new LatencyStats(
                    jobMetricGroup.addGroup("latency"),
                    historySize,
                    containingTask.getIndexInSubtaskGroup(),
                    getOperatorID(),
                    granularity);
        } catch (Exception e) {
            LOG.warn("An error occurred while instantiating latency metrics.", e);
            return new LatencyStats(
                    UnregisteredMetricGroups.createUnregisteredTaskManagerJobMetricGroup()
                            .addGroup("latency"),
                    1,
                    0,
                    new OperatorID(),
                    LatencyStats.Granularity.SINGLE);
        }
    }