c

org.apache.spark.network.shuffle

OneForOneBlockFetcher

class OneForOneBlockFetcher extends AnyRef

Simple wrapper on top of a TransportClient which interprets each chunk as a whole block, and invokes the BlockFetchingListener appropriately. This class is agnostic to the actual RPC handler, as long as there is a single "open blocks" message which returns a ShuffleStreamHandle, and Java serialization is used.

Note that this typically corresponds to a org.apache.spark.network.server.OneForOneStreamManager on the server side.

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Instance Constructors

  1. new OneForOneBlockFetcher(client: TransportClient, appId: String, execId: String, blockIds: Array[String], listener: BlockFetchingListener, transportConf: TransportConf, downloadFileManager: DownloadFileManager)
  2. new OneForOneBlockFetcher(client: TransportClient, appId: String, execId: String, blockIds: Array[String], listener: BlockFetchingListener, transportConf: TransportConf)

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  15. def start(): Unit

    Begins the fetching process, calling the listener with every block fetched.

    Begins the fetching process, calling the listener with every block fetched. The given message will be serialized with the Java serializer, and the RPC must return a StreamHandle. We will send all fetch requests immediately, without throttling.

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