Packages

c

org.apache.spark

ContextAwareIterator

class ContextAwareIterator[+T] extends Iterator[T]

:: DeveloperApi :: A TaskContext aware iterator.

As the Python evaluation consumes the parent iterator in a separate thread, it could consume more data from the parent even after the task ends and the parent is closed. If an off-heap access exists in the parent iterator, it could cause segmentation fault which crashes the executor. Thus, we should use ContextAwareIterator to stop consuming after the task ends.

Annotations
@DeveloperApi()
Source
ContextAwareIterator.scala
Linear Supertypes
Iterator[T], TraversableOnce[T], GenTraversableOnce[T], AnyRef, Any
Ordering
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  2. By Inheritance
Inherited
  1. ContextAwareIterator
  2. Iterator
  3. TraversableOnce
  4. GenTraversableOnce
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new ContextAwareIterator(context: TaskContext, delegate: Iterator[T])

Type Members

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

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. def ++[B >: T](that: ⇒ GenTraversableOnce[B]): Iterator[B]
    Definition Classes
    Iterator
  4. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  5. def addString(b: StringBuilder): StringBuilder
    Definition Classes
    TraversableOnce
  6. def addString(b: StringBuilder, sep: String): StringBuilder
    Definition Classes
    TraversableOnce
  7. def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder
    Definition Classes
    TraversableOnce
  8. def aggregate[B](z: ⇒ B)(seqop: (B, T) ⇒ B, combop: (B, B) ⇒ B): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. def buffered: BufferedIterator[T]
    Definition Classes
    Iterator
  11. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  12. def collect[B](pf: PartialFunction[T, B]): Iterator[B]
    Definition Classes
    Iterator
    Annotations
    @migration
    Migration

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

  13. def collectFirst[B](pf: PartialFunction[T, B]): Option[B]
    Definition Classes
    TraversableOnce
  14. def contains(elem: Any): Boolean
    Definition Classes
    Iterator
  15. val context: TaskContext
  16. def copyToArray[B >: T](xs: Array[B], start: Int, len: Int): Unit
    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce
  17. def copyToArray[B >: T](xs: Array[B]): Unit
    Definition Classes
    TraversableOnce → GenTraversableOnce
  18. def copyToArray[B >: T](xs: Array[B], start: Int): Unit
    Definition Classes
    TraversableOnce → GenTraversableOnce
  19. def copyToBuffer[B >: T](dest: Buffer[B]): Unit
    Definition Classes
    TraversableOnce
  20. def corresponds[B](that: GenTraversableOnce[B])(p: (T, B) ⇒ Boolean): Boolean
    Definition Classes
    Iterator
  21. def count(p: (T) ⇒ Boolean): Int
    Definition Classes
    TraversableOnce → GenTraversableOnce
  22. val delegate: Iterator[T]
  23. def drop(n: Int): Iterator[T]
    Definition Classes
    Iterator
  24. def dropWhile(p: (T) ⇒ Boolean): Iterator[T]
    Definition Classes
    Iterator
  25. def duplicate: (Iterator[T], Iterator[T])
    Definition Classes
    Iterator
  26. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  27. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  28. def exists(p: (T) ⇒ Boolean): Boolean
    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce
  29. def filter(p: (T) ⇒ Boolean): Iterator[T]
    Definition Classes
    Iterator
  30. def filterNot(p: (T) ⇒ Boolean): Iterator[T]
    Definition Classes
    Iterator
  31. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  32. def find(p: (T) ⇒ Boolean): Option[T]
    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce
  33. def flatMap[B](f: (T) ⇒ GenTraversableOnce[B]): Iterator[B]
    Definition Classes
    Iterator
  34. def fold[A1 >: T](z: A1)(op: (A1, A1) ⇒ A1): A1
    Definition Classes
    TraversableOnce → GenTraversableOnce
  35. def foldLeft[B](z: B)(op: (B, T) ⇒ B): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  36. def foldRight[B](z: B)(op: (T, B) ⇒ B): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  37. def forall(p: (T) ⇒ Boolean): Boolean
    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce
  38. def foreach[U](f: (T) ⇒ U): Unit
    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce
  39. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  40. def grouped[B >: T](size: Int): GroupedIterator[B]
    Definition Classes
    Iterator
  41. def hasDefiniteSize: Boolean
    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce
  42. def hasNext: Boolean
    Definition Classes
    ContextAwareIterator → Iterator
  43. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  44. def indexOf[B >: T](elem: B, from: Int): Int
    Definition Classes
    Iterator
  45. def indexOf[B >: T](elem: B): Int
    Definition Classes
    Iterator
  46. def indexWhere(p: (T) ⇒ Boolean, from: Int): Int
    Definition Classes
    Iterator
  47. def indexWhere(p: (T) ⇒ Boolean): Int
    Definition Classes
    Iterator
  48. def isEmpty: Boolean
    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce
  49. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  50. def isTraversableAgain: Boolean
    Definition Classes
    Iterator → GenTraversableOnce
  51. def length: Int
    Definition Classes
    Iterator
  52. def map[B](f: (T) ⇒ B): Iterator[B]
    Definition Classes
    Iterator
  53. def max[B >: T](implicit cmp: Ordering[B]): T
    Definition Classes
    TraversableOnce → GenTraversableOnce
  54. def maxBy[B](f: (T) ⇒ B)(implicit cmp: Ordering[B]): T
    Definition Classes
    TraversableOnce → GenTraversableOnce
  55. def min[B >: T](implicit cmp: Ordering[B]): T
    Definition Classes
    TraversableOnce → GenTraversableOnce
  56. def minBy[B](f: (T) ⇒ B)(implicit cmp: Ordering[B]): T
    Definition Classes
    TraversableOnce → GenTraversableOnce
  57. def mkString: String
    Definition Classes
    TraversableOnce → GenTraversableOnce
  58. def mkString(sep: String): String
    Definition Classes
    TraversableOnce → GenTraversableOnce
  59. def mkString(start: String, sep: String, end: String): String
    Definition Classes
    TraversableOnce → GenTraversableOnce
  60. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  61. def next(): T
    Definition Classes
    ContextAwareIterator → Iterator
  62. def nonEmpty: Boolean
    Definition Classes
    TraversableOnce → GenTraversableOnce
  63. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  64. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  65. def padTo[A1 >: T](len: Int, elem: A1): Iterator[A1]
    Definition Classes
    Iterator
  66. def partition(p: (T) ⇒ Boolean): (Iterator[T], Iterator[T])
    Definition Classes
    Iterator
  67. def patch[B >: T](from: Int, patchElems: Iterator[B], replaced: Int): Iterator[B]
    Definition Classes
    Iterator
  68. def product[B >: T](implicit num: Numeric[B]): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  69. def reduce[A1 >: T](op: (A1, A1) ⇒ A1): A1
    Definition Classes
    TraversableOnce → GenTraversableOnce
  70. def reduceLeft[B >: T](op: (B, T) ⇒ B): B
    Definition Classes
    TraversableOnce
  71. def reduceLeftOption[B >: T](op: (B, T) ⇒ B): Option[B]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  72. def reduceOption[A1 >: T](op: (A1, A1) ⇒ A1): Option[A1]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  73. def reduceRight[B >: T](op: (T, B) ⇒ B): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  74. def reduceRightOption[B >: T](op: (T, B) ⇒ B): Option[B]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  75. def reversed: List[T]
    Attributes
    protected[this]
    Definition Classes
    TraversableOnce
  76. def sameElements(that: Iterator[_]): Boolean
    Definition Classes
    Iterator
  77. def scanLeft[B](z: B)(op: (B, T) ⇒ B): Iterator[B]
    Definition Classes
    Iterator
  78. def scanRight[B](z: B)(op: (T, B) ⇒ B): Iterator[B]
    Definition Classes
    Iterator
  79. def seq: Iterator[T]
    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce
  80. def size: Int
    Definition Classes
    TraversableOnce → GenTraversableOnce
  81. def sizeHintIfCheap: Int
    Attributes
    protected[collection]
    Definition Classes
    GenTraversableOnce
  82. def slice(from: Int, until: Int): Iterator[T]
    Definition Classes
    Iterator
  83. def sliceIterator(from: Int, until: Int): Iterator[T]
    Attributes
    protected
    Definition Classes
    Iterator
  84. def sliding[B >: T](size: Int, step: Int): GroupedIterator[B]
    Definition Classes
    Iterator
  85. def span(p: (T) ⇒ Boolean): (Iterator[T], Iterator[T])
    Definition Classes
    Iterator
  86. def sum[B >: T](implicit num: Numeric[B]): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
  87. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  88. def take(n: Int): Iterator[T]
    Definition Classes
    Iterator
  89. def takeWhile(p: (T) ⇒ Boolean): Iterator[T]
    Definition Classes
    Iterator
  90. def to[Col[_]](implicit cbf: CanBuildFrom[Nothing, T, Col[T]]): Col[T]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  91. def toArray[B >: T](implicit arg0: ClassTag[B]): Array[B]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  92. def toBuffer[B >: T]: Buffer[B]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  93. def toIndexedSeq: IndexedSeq[T]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  94. def toIterable: Iterable[T]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  95. def toIterator: Iterator[T]
    Definition Classes
    Iterator → GenTraversableOnce
  96. def toList: List[T]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  97. def toMap[T, U](implicit ev: <:<[T, (T, U)]): Map[T, U]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  98. def toSeq: Seq[T]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  99. def toSet[B >: T]: Set[B]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  100. def toStream: Stream[T]
    Definition Classes
    Iterator → GenTraversableOnce
  101. def toString(): String
    Definition Classes
    Iterator → AnyRef → Any
  102. def toTraversable: Traversable[T]
    Definition Classes
    Iterator → TraversableOnce → GenTraversableOnce
  103. def toVector: Vector[T]
    Definition Classes
    TraversableOnce → GenTraversableOnce
  104. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  105. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  106. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  107. def withFilter(p: (T) ⇒ Boolean): Iterator[T]
    Definition Classes
    Iterator
  108. def zip[B](that: Iterator[B]): Iterator[(T, B)]
    Definition Classes
    Iterator
  109. def zipAll[B, A1 >: T, B1 >: B](that: Iterator[B], thisElem: A1, thatElem: B1): Iterator[(A1, B1)]
    Definition Classes
    Iterator
  110. def zipWithIndex: Iterator[(T, Int)]
    Definition Classes
    Iterator

Deprecated Value Members

  1. def /:[B](z: B)(op: (B, T) ⇒ B): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
    Annotations
    @deprecated
    Deprecated

    (Since version 2.12.10) Use foldLeft instead of /:

  2. def :\[B](z: B)(op: (T, B) ⇒ B): B
    Definition Classes
    TraversableOnce → GenTraversableOnce
    Annotations
    @deprecated
    Deprecated

    (Since version 2.12.10) Use foldRight instead of :\

Inherited from Iterator[T]

Inherited from TraversableOnce[T]

Inherited from GenTraversableOnce[T]

Inherited from AnyRef

Inherited from Any

Ungrouped