Trait

org.apache.spark.sql.execution.streaming

Sink

Related Doc: package streaming

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trait Sink extends AnyRef

An interface for systems that can collect the results of a streaming query. In order to preserve exactly once semantics a sink must be idempotent in the face of multiple attempts to add the same batch.

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Known Subclasses
ConsoleSink, FileStreamSink, ForeachSink, MemorySink
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Abstract Value Members

  1. abstract def addBatch(batchId: Long, data: DataFrame): Unit

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    Adds a batch of data to this sink.

    Adds a batch of data to this sink. The data for a given batchId is deterministic and if this method is called more than once with the same batchId (which will happen in the case of failures), then data should only be added once.

    Note: You cannot apply any operators on data except consuming it (e.g., collect/foreach). Otherwise, you may get a wrong result.

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  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  13. final def notify(): Unit

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  17. final def wait(): Unit

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  18. final def wait(arg0: Long, arg1: Int): Unit

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