org.apache.flink.streaming.api.datastream

类 IterativeStream<T>

java.lang.Object

org.apache.flink.streaming.api.datastream.DataStream<T>

org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator<T>

org.apache.flink.streaming.api.datastream.IterativeStream<T>

类型参数:

T - Type of the elements in this Stream

@PublicEvolving
public class IterativeStream<T>
extends SingleOutputStreamOperator<T>

The iterative data stream represents the start of an iteration in a DataStream.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	IterativeStream.ConnectedIterativeStreams<I,F> The IterativeStream.ConnectedIterativeStreams represent a start of an iterative part of a streaming program, where the original input of the iteration and the feedback of the iteration are connected as in a ConnectedStreams.

字段概要

从类继承的字段 org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator

nonParallel

从类继承的字段 org.apache.flink.streaming.api.datastream.DataStream

environment, transformation

构造器概要

构造器

限定符	构造器和说明
protected	IterativeStream(DataStream<T> dataStream, long maxWaitTime)

方法概要

限定符和类型	方法和说明
DataStream<T>	closeWith(DataStream<T> feedbackStream) Closes the iteration.
<F> IterativeStream.ConnectedIterativeStreams<T,F>	withFeedbackType(Class<F> feedbackTypeClass) Changes the feedback type of the iteration and allows the user to apply co-transformations on the input and feedback stream, as in a ConnectedStreams.
<F> IterativeStream.ConnectedIterativeStreams<T,F>	withFeedbackType(org.apache.flink.api.common.typeinfo.TypeHint<F> feedbackTypeHint) Changes the feedback type of the iteration and allows the user to apply co-transformations on the input and feedback stream, as in a ConnectedStreams.
<F> IterativeStream.ConnectedIterativeStreams<T,F>	withFeedbackType(org.apache.flink.api.common.typeinfo.TypeInformation<F> feedbackType) Changes the feedback type of the iteration and allows the user to apply co-transformations on the input and feedback stream, as in a ConnectedStreams.

从类继承的方法 org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator

disableChaining, forceNonParallel, getName, getSideOutput, name, returns, returns, returns, setBufferTimeout, setMaxParallelism, setParallelism, setUidHash, slotSharingGroup, slotSharingGroup, startNewChain, uid

从类继承的方法 org.apache.flink.streaming.api.datastream.DataStream

addSink, assignTimestampsAndWatermarks, assignTimestampsAndWatermarks, assignTimestampsAndWatermarks, broadcast, broadcast, clean, coGroup, connect, connect, countWindowAll, countWindowAll, doTransform, executeAndCollect, executeAndCollect, executeAndCollect, executeAndCollect, filter, flatMap, flatMap, forward, getExecutionConfig, getExecutionEnvironment, getId, getMinResources, getParallelism, getPreferredResources, getTransformation, getType, global, iterate, iterate, join, keyBy, keyBy, keyBy, keyBy, map, map, partitionCustom, partitionCustom, partitionCustom, print, print, printToErr, printToErr, process, process, project, rebalance, rescale, setConnectionType, shuffle, sinkTo, timeWindowAll, timeWindowAll, transform, transform, union, windowAll, writeAsCsv, writeAsCsv, writeAsCsv, writeAsText, writeAsText, writeToSocket, writeUsingOutputFormat

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

IterativeStream

protected IterativeStream(DataStream<T> dataStream,
                          long maxWaitTime)

方法详细资料

closeWith

public DataStream<T> closeWith(DataStream<T> feedbackStream)

Closes the iteration. This method defines the end of the iterative program part that will be fed back to the start of the iteration.

A common usage pattern for streaming iterations is to use output splitting to send a part of the closing data stream to the head. Refer to ProcessFunction.Context#output(OutputTag, Object) for more information.

参数:

feedbackStream - DataStream that will be used as input to the iteration head.

返回:

The feedback stream.

withFeedbackType

public <F> IterativeStream.ConnectedIterativeStreams<T,F> withFeedbackType(Class<F> feedbackTypeClass)

Changes the feedback type of the iteration and allows the user to apply co-transformations on the input and feedback stream, as in a ConnectedStreams.

For type safety the user needs to define the feedback type

参数:

feedbackTypeClass - Class of the elements in the feedback stream.

返回:

A IterativeStream.ConnectedIterativeStreams.

withFeedbackType

public <F> IterativeStream.ConnectedIterativeStreams<T,F> withFeedbackType(org.apache.flink.api.common.typeinfo.TypeHint<F> feedbackTypeHint)

Changes the feedback type of the iteration and allows the user to apply co-transformations on the input and feedback stream, as in a ConnectedStreams.

For type safety the user needs to define the feedback type

参数:

feedbackTypeHint - Class of the elements in the feedback stream.

返回:

A IterativeStream.ConnectedIterativeStreams.

withFeedbackType

public <F> IterativeStream.ConnectedIterativeStreams<T,F> withFeedbackType(org.apache.flink.api.common.typeinfo.TypeInformation<F> feedbackType)

Changes the feedback type of the iteration and allows the user to apply co-transformations on the input and feedback stream, as in a ConnectedStreams.

For type safety the user needs to define the feedback type

参数:

feedbackType - The type information of the feedback stream.

返回:

A IterativeStream.ConnectedIterativeStreams.