DistCacheScioContext

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8. 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

9. 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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