implicit final class MapWrapper[V] extends AnyVal
Wrappers to map in parallel an iterator scala.Iterator.
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- new MapWrapper(iterator: Iterator[V])
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- def mapParallel[U](numThreads: Int, threadFactory: => ThreadFactory = Executors.defaultThreadFactory())(f: (V) => U): Iterator[U]
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel.
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel.
- U
Type of the new values
- numThreads
Number of threads to use for parallel invocations of f(). Can only be set to a value larger than 1 if the operations include IO operations, or if multiple cores are available per executor.
- threadFactory
The thread factory used to create new threads. This can be used to add initialization code to each worker.
- f
Mapping function, providing the new value for the element
- returns
An iterator with mapping function applied to each element.
- def mapParallel[U](f: (V) => U, numThreads: Int, threadFactory: => ThreadFactory): Iterator[U]
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel.
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel.
- U
Type of the new values
- f
Mapping function, providing the new value for the element
- numThreads
Number of threads to use for parallel invocations of f(). Can only be set to a value larger than 1 if the operations include IO operations, or if multiple cores are available per executor.
- threadFactory
The thread factory used to create new threads. This can be used to add initialization code to each worker.
- returns
An iterator with mapping function applied to each element.
- def mapParallel[U](f: (V) => U, numThreads: Int): Iterator[U]
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel.
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel.
- U
Type of the new values
- f
Mapping function, providing the new value for the element
- numThreads
Number of threads to use for parallel invocations of f(). Can only be set to a value larger than 1 if the operations include IO operations, or if multiple cores are available per executor.
- returns
An iterator with mapping function applied to each element.
- def mapParallelUnordered[U](numThreads: Int, threadFactory: => ThreadFactory = Executors.defaultThreadFactory())(f: (V) => U): Iterator[U]
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel.
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel. Elements are emitted as soon as they are ready, therefore it is possible that the transformed elements are not in the same order as in the input iterator.
- U
Type of the new values
- numThreads
Number of threads to use for parallel invocations of f(). Can only be set to a value larger than 1 if the operations include IO operations, or if multiple cores are available per executor.
- threadFactory
The thread factory used to create new threads. This can be used to add initialization code to each worker.
- f
Mapping function, providing the new value for the element
- returns
An iterator with mapping function applied to each element.
- def mapParallelUnordered[U](f: (V) => U, numThreads: Int, threadFactory: => ThreadFactory): Iterator[U]
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel.
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel. Elements are emitted as soon as they are ready, therefore it is possible that the transformed elements are not in the same order as in the input iterator.
- U
Type of the new values
- f
Mapping function, providing the new value for the element
- numThreads
Number of threads to use for parallel invocations of f(). Can only be set to a value larger than 1 if the operations include IO operations, or if multiple cores are available per executor.
- threadFactory
The thread factory used to create new threads. This can be used to add initialization code to each worker.
- returns
An iterator with mapping function applied to each element.
- def mapParallelUnordered[U](f: (V) => U, numThreads: Int): Iterator[U]
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel.
Applies a map to an iterator, but it can use a thread pool if numThreads is >1, in that case elements are computed in parallel. Elements are emitted as soon as they are ready, therefore it is possible that the transformed elements are not in the same order as in the input iterator.
- U
Type of the new values
- f
Mapping function, providing the new value for the element
- numThreads
Number of threads to use for parallel invocations of f(). Can only be set to a value larger than 1 if the operations include IO operations, or if multiple cores are available per executor.
- returns
An iterator with mapping function applied to each element.
- def toString(): String
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