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com.mapr.db.spark

MapRDBSpark

object MapRDBSpark

MapRDBSpark is a static class which contains factory methods to create scala's ojai document and partitioner objects.

Example:

  1. Factory functions to help create scala's ojai documents val doc = MapRDBSpark.newDocument(jsonString) val doc = MapRDBSpark.newDocument(document: org.ojai.Document) Here are the ways to access elements in OJAIDocument val partitioner = MapRDBSpark.newPartitioner(tableName) It creates a partitioiner using the splits specified in tableName. val partitioner = MapRDBSpark.newPartitioner(Seq("AA","CC")) It creates a partitioner using the splits provided in the sequence. Here three splits will be created (null, "AA") , ("AA","CC") and ("CC", null) Note that this call assumes that user supplies the splits in sorted order.

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  6. def docToRow(ojaiDoc: OJAIDocument, schema: StructType): Row

    A function to convert an OJAI Document to Spark's Row format.

    A function to convert an OJAI Document to Spark's Row format.

    ojaiDoc

    OJAI Document to be converted to Spark's Row format.

    schema

    Schema for the Row.

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  12. final def ne(arg0: AnyRef): Boolean
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  13. def newDocument(jsonString: String): OJAIDocument

    Factory function to create a new OJAIDocument from a json string.

    Factory function to create a new OJAIDocument from a json string.

    jsonString

    a json document.

  14. def newDocument(): OJAIDocument

    Factory function to create a new OJAIDocument from org.ojai.Document.

  15. def newDocument(doc: Document): OJAIDocument

    Factory function to create a new OJAIDocument from org.ojai.Document.

    Factory function to create a new OJAIDocument from org.ojai.Document.

    doc

    org.ojai.Document

  16. def newPartitioner[T](splits: Seq[T])(implicit arg0: OJAIKEY[T]): MapRDBSplitPartitioner[T]

    Factory function to create a new partitioner from splits provided as sequence.

    Factory function to create a new partitioner from splits provided as sequence.

    splits

    a sequence of splits Splits supported at this point are String and ByteBuffer. It is user's responsibility to supply the splits in ascending order.

  17. def newPartitioner[T](table: String, bufferWrites: Boolean = true)(implicit arg0: OJAIKEY[T]): Partitioner

    Factory function to create a new partitioner using existing MapRDBTable.

    Factory function to create a new partitioner using existing MapRDBTable.

    table

    existing tableName in MapRDB

  18. final def notify(): Unit
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  19. final def notifyAll(): Unit
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  20. def rowToDoc(row: Row): OJAIDocument

    A function to convert a Spark's ROW to OJAIDocument.

    A function to convert a Spark's ROW to OJAIDocument.

    row

    Spark's Dataframe or Dataset Row.

  21. def serializableBinaryValue(buff: ByteBuffer): DBBinaryValue

    Factory function to convert a ByteBuffer into a serializable binary value.

    Factory function to convert a ByteBuffer into a serializable binary value.

    buff

    ByteBuffer

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    (Since version ) see corresponding Javadoc for more information.

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