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org.apache.spark.network.client

ChunkReceivedCallback

trait ChunkReceivedCallback extends AnyRef

Callback for the result of a single chunk result. For a single stream, the callbacks are guaranteed to be called by the same thread in the same order as the requests for chunks were made.

Note that if a general stream failure occurs, all outstanding chunk requests may be failed.

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  1. abstract def onFailure(chunkIndex: Int, e: Throwable): Unit

    Called upon failure to fetch a particular chunk.

    Called upon failure to fetch a particular chunk. Note that this may actually be called due to failure to fetch a prior chunk in this stream.

    After receiving a failure, the stream may or may not be valid. The client should not assume that the server's side of the stream has been closed.

  2. abstract def onSuccess(chunkIndex: Int, buffer: ManagedBuffer): Unit

    Called upon receipt of a particular chunk.

    Called upon receipt of a particular chunk.

    The given buffer will initially have a refcount of 1, but will be release()'d as soon as this call returns. You must therefore either retain() the buffer or copy its contents before returning.

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