class DataStreamUtils[T] extends AnyRef
This class provides simple utility methods for collecting a DataStream, effectively enriching it with the functionality encapsulated by DataStreamUtils.
This experimental class is relocated from flink-streaming-contrib.
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new
DataStreamUtils(self: DataStream[T])(implicit arg0: TypeInformation[T], arg1: ClassTag[T])
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DataStream
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def
reinterpretAsKeyedStream[K](keySelector: (T) ⇒ K)(implicit arg0: TypeInformation[K]): KeyedStream[T, K]
Reinterprets the given DataStream as a KeyedStream, which extracts keys with the given KeySelector.
Reinterprets the given DataStream as a KeyedStream, which extracts keys with the given KeySelector.
IMPORTANT: For every partition of the base stream, the keys of events in the base stream must be partitioned exactly in the same way as if it was created through a DataStream#keyBy(KeySelector).
- keySelector
Function that defines how keys are extracted from the data stream.
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The reinterpretation of the DataStream as a KeyedStream.
- val self: DataStream[T]
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def
collect(): Iterator[T]
Returns a scala iterator to iterate over the elements of the DataStream.
Returns a scala iterator to iterate over the elements of the DataStream.
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The iterator
- Deprecated
Replaced with DataStream#executeAndCollect.
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