org.apache.flink.streaming.api.datastream

类 IterativeStream.ConnectedIterativeStreams<I,F>

java.lang.Object

org.apache.flink.streaming.api.datastream.ConnectedStreams<I,F>

org.apache.flink.streaming.api.datastream.IterativeStream.ConnectedIterativeStreams<I,F>

类型参数:

I - Type of the input of the iteration

F - Type of the feedback of the iteration

封闭类:

IterativeStream<T>

@Public
public static class IterativeStream.ConnectedIterativeStreams<I,F>
extends ConnectedStreams<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.

The user can distinguish between the two inputs using co-transformation, thus eliminating the need for mapping the inputs and outputs to a common type.

字段概要

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

environment, inputStream1, inputStream2

构造器概要

构造器

构造器和说明
ConnectedIterativeStreams(DataStream<I> input, org.apache.flink.api.common.typeinfo.TypeInformation<F> feedbackType, long waitTime)

方法概要

限定符和类型	方法和说明
DataStream<F>	closeWith(DataStream<F> feedbackStream) Closes the iteration.
ConnectedStreams<I,F>	keyBy(int[] keyPositions1, int[] keyPositions2) KeyBy operation for connected data stream.
<KEY> ConnectedStreams<I,F>	keyBy(org.apache.flink.api.java.functions.KeySelector<I,KEY> keySelector1, org.apache.flink.api.java.functions.KeySelector<F,KEY> keySelector2) KeyBy operation for connected data stream.
<KEY> ConnectedStreams<I,F>	keyBy(org.apache.flink.api.java.functions.KeySelector<I,KEY> keySelector1, org.apache.flink.api.java.functions.KeySelector<F,KEY> keySelector2, org.apache.flink.api.common.typeinfo.TypeInformation<KEY> keyType) KeyBy operation for connected data stream.
ConnectedStreams<I,F>	keyBy(String[] fields1, String[] fields2) KeyBy operation for connected data stream using key expressions. the elements of input1 and input2 according to fields1 and fields2.
ConnectedStreams<I,F>	keyBy(String field1, String field2) KeyBy operation for connected data stream using key expressions.

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

flatMap, flatMap, getExecutionEnvironment, getFirstInput, getSecondInput, getType1, getType2, keyBy, map, map, process, process, process, process, transform, transform

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

ConnectedIterativeStreams

public ConnectedIterativeStreams(DataStream<I> input,
                                 org.apache.flink.api.common.typeinfo.TypeInformation<F> feedbackType,
                                 long waitTime)

方法详细资料

closeWith

public DataStream<F> closeWith(DataStream<F> 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 as the second input in the ConnectedStreams.

参数:

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

返回:

The feedback stream.

keyBy

public ConnectedStreams<I,F> keyBy(int[] keyPositions1,
                                   int[] keyPositions2)

从类复制的说明: ConnectedStreams

KeyBy operation for connected data stream. Assigns keys to the elements of input1 and input2 according to keyPositions1 and keyPositions2.

覆盖:

keyBy 在类中 ConnectedStreams<I,F>

参数:

keyPositions1 - The fields used to group the first input stream.

keyPositions2 - The fields used to group the second input stream.

返回:

The grouped ConnectedStreams

keyBy

public ConnectedStreams<I,F> keyBy(String field1,
                                   String field2)

从类复制的说明: ConnectedStreams

KeyBy operation for connected data stream using key expressions. Assigns keys to the elements of input1 and input2 according to field1 and field2. A field expression is either the name of a public field or a getter method with parentheses of the DataStreamS underlying type. A dot can be used to drill down into objects, as in "field1.getInnerField2()" .

覆盖:

keyBy 在类中 ConnectedStreams<I,F>

参数:

field1 - The grouping expression for the first input

field2 - The grouping expression for the second input

返回:

The grouped ConnectedStreams

keyBy

public ConnectedStreams<I,F> keyBy(String[] fields1,
                                   String[] fields2)

从类复制的说明: ConnectedStreams

KeyBy operation for connected data stream using key expressions. the elements of input1 and input2 according to fields1 and fields2. A field expression is either the name of a public field or a getter method with parentheses of the DataStreamS underlying type. A dot can be used to drill down into objects, as in "field1.getInnerField2()" .

覆盖:

keyBy 在类中 ConnectedStreams<I,F>

参数:

fields1 - The grouping expressions for the first input

fields2 - The grouping expressions for the second input

返回:

The grouped ConnectedStreams

keyBy

public <KEY> ConnectedStreams<I,F> keyBy(org.apache.flink.api.java.functions.KeySelector<I,KEY> keySelector1,
                                         org.apache.flink.api.java.functions.KeySelector<F,KEY> keySelector2)

从类复制的说明: ConnectedStreams

KeyBy operation for connected data stream. Assigns keys to the elements of input1 and input2 using keySelector1 and keySelector2.

覆盖:

keyBy 在类中 ConnectedStreams<I,F>

参数:

keySelector1 - The KeySelector used for grouping the first input

keySelector2 - The KeySelector used for grouping the second input

返回:

The partitioned ConnectedStreams

keyBy

public <KEY> ConnectedStreams<I,F> keyBy(org.apache.flink.api.java.functions.KeySelector<I,KEY> keySelector1,
                                         org.apache.flink.api.java.functions.KeySelector<F,KEY> keySelector2,
                                         org.apache.flink.api.common.typeinfo.TypeInformation<KEY> keyType)

从类复制的说明: ConnectedStreams

KeyBy operation for connected data stream. Assigns keys to the elements of input1 and input2 using keySelector1 and keySelector2 with explicit type information for the common key type.

覆盖:

keyBy 在类中 ConnectedStreams<I,F>

参数:

keySelector1 - The KeySelector used for grouping the first input

keySelector2 - The KeySelector used for grouping the second input

keyType - The type information of the common key type.

返回:

The partitioned ConnectedStreams