org.apache.spark.sql.execution.streaming

Source

trait Source extends AnyRef

A source of continually arriving data for a streaming query. A Source must have a monotonically increasing notion of progress that can be represented as an Offset. Spark will regularly query each Source to see if any more data is available.

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FileStreamSource, MemoryStream
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Abstract Value Members

  1. abstract def getBatch(start: Option[Offset], end: Offset): DataFrame

    Returns the data that is between the offsets (start, end].

    Returns the data that is between the offsets (start, end]. When start is None then the batch should begin with the first available record. This method must always return the same data for a particular start and end pair.

  2. abstract def getOffset: Option[Offset]

    Returns the maximum available offset for this source.

  3. abstract def schema: StructType

    Returns the schema of the data from this source

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