sealed trait VirtualSourceReader[T <: VirtualSourceConfig] extends AnyRef

Base virtual sources reader

Note

In order to read virtual source it is required to provide map of already defined sources.

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Known Subclasses
AggregateVirtualSourceReader, AnyVirtualSourceReader, FilterVirtualSourceReader, JoinVirtualSourceReader, SelectVirtualSourceReader, SqlVirtualSourceReader
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Abstract Value Members

  1. abstract def getDataFrame(config: T, parents: Seq[Source], readMode: ReadMode)(implicit settings: AppSettings, spark: SparkSession): DataFrame

    Builds virtual source dataframe given the virtual source configuration.

    Builds virtual source dataframe given the virtual source configuration.

    config

    Virtual source configuration

    parents

    Sequence of parent sources for this virtual source

    readMode

    Mode in which source is read. Either 'batch' or 'stream'

    settings

    Implicit application settings object

    spark

    Implicit spark session object

    returns

    Spark Dataframe

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
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  2. final def ##(): Int
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  5. def clone(): AnyRef
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  6. final def eq(arg0: AnyRef): Boolean
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  8. def finalize(): Unit
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  9. final def getClass(): Class[_]
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    @native()
  10. def getParents(config: T, parentSources: Map[String, Source]): Seq[Source]

    Retrieves parent sources for a particular virtual source configuration.

    Retrieves parent sources for a particular virtual source configuration.

    config

    Virtual source configuration

    parentSources

    Map of already defined virtual sources

    returns

    Sequence of parent sources specific to given virtual source configuration.

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    protected
  11. def hashCode(): Int
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  12. final def isInstanceOf[T0]: Boolean
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  13. final def ne(arg0: AnyRef): Boolean
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  14. final def notify(): Unit
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  15. final def notifyAll(): Unit
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  16. def read(config: T, parentSources: Map[String, Source], readMode: ReadMode)(implicit settings: AppSettings, spark: SparkSession): Result[Source]

    Safely reads virtual source given source configuration.

    Safely reads virtual source given source configuration.

    config

    Virtual source configuration

    parentSources

    Map of already defined sources (sourceId -> Source)

    readMode

    Mode in which source is read. Either 'batch' or 'stream'

    settings

    Implicit application settings object

    spark

    Implicit spark session object

    returns

    Either a valid Source or a list of source reading errors.

  17. final def synchronized[T0](arg0: ⇒ T0): T0
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  18. def toString(): String
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