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trait SparkDataStream extends AnyRef

The base interface representing a readable data stream in a Spark streaming query. It's responsible to manage the offsets of the streaming source in the streaming query.

Data sources should implement concrete data stream interfaces: MicroBatchStream and ContinuousStream.

Since

3.0.0

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AnyRef, Any
Known Subclasses
ContinuousStream, MicroBatchStream, SupportsAdmissionControl
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Abstract Value Members

  1. abstract def commit(end: Offset): Unit

    Informs the source that Spark has completed processing all data for offsets less than or equal to end and will only request offsets greater than end in the future.

  2. abstract def deserializeOffset(json: String): Offset

    Deserialize a JSON string into an Offset of the implementation-defined offset type.

    Deserialize a JSON string into an Offset of the implementation-defined offset type.

    Exceptions thrown

    IllegalArgumentException if the JSON does not encode a valid offset for this reader

  3. abstract def initialOffset(): Offset

    Returns the initial offset for a streaming query to start reading from.

    Returns the initial offset for a streaming query to start reading from. Note that the streaming data source should not assume that it will start reading from its initial offset: if Spark is restarting an existing query, it will restart from the check-pointed offset rather than the initial one.

  4. abstract def stop(): Unit

    Stop this source and free any resources it has allocated.

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