Class

com.datastax.spark.connector.rdd.reader

PrefetchingResultSetIterator

Related Doc: package reader

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class PrefetchingResultSetIterator extends Iterator[Row]

Allows to efficiently iterate over a large, paged ResultSet, asynchronously prefetching the next page.

Linear Supertypes
Iterator[Row], TraversableOnce[Row], GenTraversableOnce[Row], AnyRef, Any
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Inherited
  1. PrefetchingResultSetIterator
  2. Iterator
  3. TraversableOnce
  4. GenTraversableOnce
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new PrefetchingResultSetIterator(resultSet: ResultSet, prefetchWindowSize: Int, timer: Option[Timer] = None)

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    resultSet

    result set obtained from the Java driver

    prefetchWindowSize

    if there are less than this rows available without blocking, initiates fetching the next page

    timer

    a Codahale timer to optionally gather the metrics of fetching time

Type Members

  1. class GroupedIterator[B >: A] extends AbstractIterator[Seq[B]] with Iterator[Seq[B]]

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    Definition Classes
    Iterator

Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. def ++[B >: Row](that: ⇒ GenTraversableOnce[B]): Iterator[B]

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    Definition Classes
    Iterator

  4. def /:[B](z: B)(op: (B, Row) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  5. def :\[B](z: B)(op: (Row, B) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  6. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  7. def addString(b: StringBuilder): StringBuilder

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    Definition Classes
    TraversableOnce

  8. def addString(b: StringBuilder, sep: String): StringBuilder

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    Definition Classes
    TraversableOnce

  9. def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder

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    Definition Classes
    TraversableOnce

  10. def aggregate[B](z: ⇒ B)(seqop: (B, Row) ⇒ B, combop: (B, B) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  11. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  12. def buffered: BufferedIterator[Row]

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    Definition Classes
    Iterator

  13. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  14. def collect[B](pf: PartialFunction[Row, B]): Iterator[B]

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    Definition Classes
    Iterator
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) collect has changed. The previous behavior can be reproduced with toSeq.

  15. def collectFirst[B](pf: PartialFunction[Row, B]): Option[B]

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    Definition Classes
    TraversableOnce

  16. def contains(elem: Any): Boolean

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    Definition Classes
    Iterator

  17. def copyToArray[B >: Row](xs: Array[B], start: Int, len: Int): Unit

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  18. def copyToArray[B >: Row](xs: Array[B]): Unit

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  19. def copyToArray[B >: Row](xs: Array[B], start: Int): Unit

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  20. def copyToBuffer[B >: Row](dest: Buffer[B]): Unit

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    Definition Classes
    TraversableOnce

  21. def corresponds[B](that: GenTraversableOnce[B])(p: (Row, B) ⇒ Boolean): Boolean

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    Definition Classes
    Iterator

  22. def count(p: (Row) ⇒ Boolean): Int

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  23. def drop(n: Int): Iterator[Row]

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    Definition Classes
    Iterator

  24. def dropWhile(p: (Row) ⇒ Boolean): Iterator[Row]

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    Definition Classes
    Iterator

  25. def duplicate: (Iterator[Row], Iterator[Row])

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    Definition Classes
    Iterator

  26. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  27. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  28. def exists(p: (Row) ⇒ Boolean): Boolean

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  29. def filter(p: (Row) ⇒ Boolean): Iterator[Row]

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    Definition Classes
    Iterator

  30. def filterNot(p: (Row) ⇒ Boolean): Iterator[Row]

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    Definition Classes
    Iterator

  31. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  32. def find(p: (Row) ⇒ Boolean): Option[Row]

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  33. def flatMap[B](f: (Row) ⇒ GenTraversableOnce[B]): Iterator[B]

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    Definition Classes
    Iterator

  34. def fold[A1 >: Row](z: A1)(op: (A1, A1) ⇒ A1): A1

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  35. def foldLeft[B](z: B)(op: (B, Row) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  36. def foldRight[B](z: B)(op: (Row, B) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  37. def forall(p: (Row) ⇒ Boolean): Boolean

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  38. def foreach[U](f: (Row) ⇒ U): Unit

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  39. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any

  40. def grouped[B >: Row](size: Int): GroupedIterator[B]

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    Definition Classes
    Iterator

  41. def hasDefiniteSize: Boolean

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  42. def hasNext: Boolean

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    Definition Classes
    PrefetchingResultSetIterator → Iterator

  43. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  44. def indexOf[B >: Row](elem: B): Int

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    Definition Classes
    Iterator

  45. def indexWhere(p: (Row) ⇒ Boolean): Int

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    Definition Classes
    Iterator

  46. def isEmpty: Boolean

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  47. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  48. def isTraversableAgain: Boolean

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    Definition Classes
    Iterator → GenTraversableOnce

  49. def length: Int

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    Definition Classes
    Iterator

  50. def map[B](f: (Row) ⇒ B): Iterator[B]

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    Definition Classes
    Iterator

  51. def max[B >: Row](implicit cmp: Ordering[B]): Row

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  52. def maxBy[B](f: (Row) ⇒ B)(implicit cmp: Ordering[B]): Row

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  53. def min[B >: Row](implicit cmp: Ordering[B]): Row

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  54. def minBy[B](f: (Row) ⇒ B)(implicit cmp: Ordering[B]): Row

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  55. def mkString: String

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  56. def mkString(sep: String): String

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  57. def mkString(start: String, sep: String, end: String): String

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  58. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  59. def next(): Row

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    Definition Classes
    PrefetchingResultSetIterator → Iterator

  60. def nonEmpty: Boolean

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  61. final def notify(): Unit

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    Definition Classes
    AnyRef

  62. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  63. def padTo[A1 >: Row](len: Int, elem: A1): Iterator[A1]

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    Definition Classes
    Iterator

  64. def partition(p: (Row) ⇒ Boolean): (Iterator[Row], Iterator[Row])

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    Definition Classes
    Iterator

  65. def patch[B >: Row](from: Int, patchElems: Iterator[B], replaced: Int): Iterator[B]

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    Definition Classes
    Iterator

  66. def product[B >: Row](implicit num: Numeric[B]): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  67. def reduce[A1 >: Row](op: (A1, A1) ⇒ A1): A1

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  68. def reduceLeft[B >: Row](op: (B, Row) ⇒ B): B

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    Definition Classes
    TraversableOnce

  69. def reduceLeftOption[B >: Row](op: (B, Row) ⇒ B): Option[B]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  70. def reduceOption[A1 >: Row](op: (A1, A1) ⇒ A1): Option[A1]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  71. def reduceRight[B >: Row](op: (Row, B) ⇒ B): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  72. def reduceRightOption[B >: Row](op: (Row, B) ⇒ B): Option[B]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  73. def reversed: List[Row]

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    Attributes
    protected[this]
    Definition Classes
    TraversableOnce

  74. def sameElements(that: Iterator[_]): Boolean

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    Definition Classes
    Iterator

  75. def scanLeft[B](z: B)(op: (B, Row) ⇒ B): Iterator[B]

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    Definition Classes
    Iterator

  76. def scanRight[B](z: B)(op: (Row, B) ⇒ B): Iterator[B]

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    Definition Classes
    Iterator

  77. def seq: Iterator[Row]

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  78. def size: Int

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  79. def slice(from: Int, until: Int): Iterator[Row]

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    Definition Classes
    Iterator

  80. def sliding[B >: Row](size: Int, step: Int): GroupedIterator[B]

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    Definition Classes
    Iterator

  81. def span(p: (Row) ⇒ Boolean): (Iterator[Row], Iterator[Row])

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    Definition Classes
    Iterator

  82. def sum[B >: Row](implicit num: Numeric[B]): B

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  83. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef

  84. def take(n: Int): Iterator[Row]

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    Definition Classes
    Iterator

  85. def takeWhile(p: (Row) ⇒ Boolean): Iterator[Row]

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    Definition Classes
    Iterator

  86. def to[Col[_]](implicit cbf: CanBuildFrom[Nothing, Row, Col[Row]]): Col[Row]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  87. def toArray[B >: Row](implicit arg0: ClassTag[B]): Array[B]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  88. def toBuffer[B >: Row]: Buffer[B]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  89. def toIndexedSeq: IndexedSeq[Row]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  90. def toIterable: Iterable[Row]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  91. def toIterator: Iterator[Row]

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    Definition Classes
    Iterator → GenTraversableOnce

  92. def toList: List[Row]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  93. def toMap[T, U](implicit ev: <:<[Row, (T, U)]): Map[T, U]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  94. def toSeq: Seq[Row]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  95. def toSet[B >: Row]: Set[B]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  96. def toStream: Stream[Row]

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    Definition Classes
    Iterator → GenTraversableOnce

  97. def toString(): String

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    Definition Classes
    Iterator → AnyRef → Any

  98. def toTraversable: Traversable[Row]

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    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce

  99. def toVector: Vector[Row]

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    Definition Classes
    TraversableOnce → GenTraversableOnce

  100. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  101. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  102. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  103. def withFilter(p: (Row) ⇒ Boolean): Iterator[Row]

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    Definition Classes
    Iterator

  104. def zip[B](that: Iterator[B]): Iterator[(Row, B)]

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    Definition Classes
    Iterator

  105. def zipAll[B, A1 >: Row, B1 >: B](that: Iterator[B], thisElem: A1, thatElem: B1): Iterator[(A1, B1)]

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    Definition Classes
    Iterator

  106. def zipWithIndex: Iterator[(Row, Int)]

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    Definition Classes
    Iterator

Inherited from Iterator[Row]

Inherited from TraversableOnce[Row]

Inherited from GenTraversableOnce[Row]

Inherited from AnyRef

Inherited from Any

Ungrouped