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c

com.spotify.scio

DistCacheScioContext

class DistCacheScioContext extends AnyRef

An enhanced ScioContext with distributed cache features.

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  6. def distCache[F](uris: Seq[String])(initFn: (Seq[File]) => F): DistCache[F]

    Create a new DistCache instance.

    Create a new DistCache instance.

    uris

    Google Cloud Storage URIs of the files to be distributed to all workers

    initFn

    function to initialized the distributed files

  7. def distCache[F](uri: String)(initFn: (File) => F): DistCache[F]

    Create a new DistCache instance.

    Create a new DistCache instance.

    uri

    Google Cloud Storage URI of the file to be distributed to all workers

    initFn

    function to initialized the distributed file

    // Prepare distributed cache as Map[Int, String]
    val dc = sc.distCache("gs://dataflow-samples/samples/misc/months.txt") { f =>
      scala.io.Source.fromFile(f).getLines().map { s =>
        val t = s.split(" ")
        (t(0).toInt, t(1))
      }.toMap
    }
    
    val p: SCollection[Int] = // ...
    // Extract distributed cache inside a transform
    p.map(x => dc().getOrElse(x, "unknown"))
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dist_cache

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