software.uncharted.salt.core.generation

TileGenerator

abstract class TileGenerator extends AnyRef

Produces an RDD[SeriesData] which only materializes when an operation pulls some or all of those tiles back to the Spark driver

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Instance Constructors

  1. new TileGenerator(sc: SparkContext)

    sc

    a SparkContext

Abstract Value Members

  1. abstract def generate[RT, TC](data: RDD[RT], series: Seq[Series[RT, _, TC, _, _, _, _, _, _]], request: TileRequest[TC])(implicit arg0: ClassTag[TC]): RDD[Tile[TC]]

    RT

    the source data record type (the source data is an RDD[RT])

    TC

    the abstract type representing a tile coordinate. Must feature a zero-arg constructor.

    data

    the RDD containing source data

    series

    a Seq of matching sets of ValueExtractors+Projection+Aggregators, which represent different aggregations of identical data within a tile (into different quantities of bins, using different columns, and/or different aggregation functions). All Series will be generated simultaneously via a single pass over the source data.

    request

    tiles requested for generation

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  11. final def generate[RT, TC](data: RDD[RT], series: Series[RT, _, TC, _, _, _, _, _, _], request: TileRequest[TC])(implicit arg0: ClassTag[TC]): RDD[Tile[TC]]

    Same as generate(RDD[], Seq[Series], TileRequest), but offers a shortcut for a single Series

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