Examples with FactScanResult co.cask.cdap.data2.dataset2.lib.timeseries.FactScanResult used on opensource projects

Example 1 with FactScanResult

use of co.cask.cdap.data2.dataset2.lib.timeseries.FactScanResult in project cdap by caskdata.

the class DefaultCube method getTimeSeries.

private Table<Map<String, String>, String, Map<Long, Long>> getTimeSeries(CubeQuery query, FactScanner scanner) {
    // {dimension values, measure} -> {time -> value}s
    Table<Map<String, String>, String, Map<Long, Long>> result = HashBasedTable.create();
    int count = 0;
    while (scanner.hasNext()) {
        FactScanResult next = scanner.next();
        incrementMetric("cube.query.scan.records.count", 1);
        boolean skip = false;
        // using tree map, as we are using it as a key for a map
        Map<String, String> seriesDimensions = Maps.newTreeMap();
        for (String dimensionName : query.getGroupByDimensions()) {
            // todo: use Map<String, String> instead of List<DimensionValue> into a String, String, everywhere
            for (DimensionValue dimensionValue : next.getDimensionValues()) {
                if (dimensionName.equals(dimensionValue.getName())) {
                    if (dimensionValue.getValue() == null) {
                        // Currently, we do NOT return null as grouped by value.
                        // Depending on whether dimension is required or not the records with null value in it may or may not be
                        // in aggregation. At this moment, the choosing of the aggregation for query doesn't look at this, so
                        // potentially null may or may not be included in results, depending on the aggregation selected
                        // querying. We don't want to produce inconsistent results varying due to different aggregations selected,
                        // so don't return nulls in any of those cases.
                        skip = true;
                        continue;
                    }
                    seriesDimensions.put(dimensionName, dimensionValue.getValue());
                    break;
                }
            }
        }
        if (skip) {
            incrementMetric("cube.query.scan.skipped.count", 1);
            continue;
        }
        for (TimeValue timeValue : next) {
            Map<Long, Long> timeValues = result.get(seriesDimensions, next.getMeasureName());
            if (timeValues == null) {
                result.put(seriesDimensions, next.getMeasureName(), Maps.<Long, Long>newHashMap());
            }
            AggregationFunction function = query.getMeasurements().get(next.getMeasureName());
            if (AggregationFunction.SUM == function) {
                Long value = result.get(seriesDimensions, next.getMeasureName()).get(timeValue.getTimestamp());
                value = value == null ? 0 : value;
                value += timeValue.getValue();
                result.get(seriesDimensions, next.getMeasureName()).put(timeValue.getTimestamp(), value);
            } else if (AggregationFunction.MAX == function) {
                Long value = result.get(seriesDimensions, next.getMeasureName()).get(timeValue.getTimestamp());
                value = value != null && value > timeValue.getValue() ? value : timeValue.getValue();
                result.get(seriesDimensions, next.getMeasureName()).put(timeValue.getTimestamp(), value);
            } else if (AggregationFunction.MIN == function) {
                Long value = result.get(seriesDimensions, next.getMeasureName()).get(timeValue.getTimestamp());
                value = value != null && value < timeValue.getValue() ? value : timeValue.getValue();
                result.get(seriesDimensions, next.getMeasureName()).put(timeValue.getTimestamp(), value);
            } else if (AggregationFunction.LATEST == function) {
                result.get(seriesDimensions, next.getMeasureName()).put(timeValue.getTimestamp(), timeValue.getValue());
            } else {
                // should never happen: developer error
                throw new RuntimeException("Unknown MeasureType: " + function);
            }
        }
        if (++count >= MAX_RECORDS_TO_SCAN) {
            break;
        }
    }
    return result;
}