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com.nvidia.spark.rapids.shuffle

RapidsShuffleFetchHandler

trait RapidsShuffleFetchHandler extends AnyRef

trait used by client consumers (RapidsShuffleIterator) to gather what the expected number of batches (Tables) is, and the ids for each table as they are received.

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Abstract Value Members

  1. abstract def batchReceived(bufferId: ShuffleReceivedBufferId): Boolean

    Called when a buffer is received and has been handed off to the catalog.

    Called when a buffer is received and has been handed off to the catalog.

    bufferId

    - a tracked shuffle buffer id

    returns

    a boolean that lets the caller know the batch was accepted (true), or rejected (false), in which case the caller should dispose of the batch.

  2. abstract def start(expectedBatches: Int): Unit

    After a response for shuffle metadata is received, the expected number of columnar batches is communicated back to the caller via this method.

    After a response for shuffle metadata is received, the expected number of columnar batches is communicated back to the caller via this method.

    expectedBatches

    - number of columnar batches

  3. abstract def transferError(errorMessage: String, throwable: Throwable = null): Unit

    Called when the transport layer is not able to handle a fetch error for metadata or buffer fetches.

    Called when the transport layer is not able to handle a fetch error for metadata or buffer fetches.

    errorMessage

    - a string containing an error message

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