Examples with BufferAggregator io.druid.query.aggregation.BufferAggregator used on opensource projects

Example 6 with BufferAggregator

use of io.druid.query.aggregation.BufferAggregator in project druid by druid-io.

the class OffheapIncrementalIndex method initAggs.

@Override
protected BufferAggregator[] initAggs(AggregatorFactory[] metrics, Supplier<InputRow> rowSupplier, boolean deserializeComplexMetrics) {
    selectors = Maps.newHashMap();
    aggOffsetInBuffer = new int[metrics.length];
    for (int i = 0; i < metrics.length; i++) {
        AggregatorFactory agg = metrics[i];
        ColumnSelectorFactory columnSelectorFactory = makeColumnSelectorFactory(agg, rowSupplier, deserializeComplexMetrics);
        selectors.put(agg.getName(), new OnheapIncrementalIndex.ObjectCachingColumnSelectorFactory(columnSelectorFactory));
        if (i == 0) {
            aggOffsetInBuffer[i] = 0;
        } else {
            aggOffsetInBuffer[i] = aggOffsetInBuffer[i - 1] + metrics[i - 1].getMaxIntermediateSize();
        }
    }
    aggsTotalSize = aggOffsetInBuffer[metrics.length - 1] + metrics[metrics.length - 1].getMaxIntermediateSize();
    return new BufferAggregator[metrics.length];
}