org.apache.flink.streaming.api.datastream.temporal

Class StreamJoinOperator.JoinWindow<I1,I2>

java.lang.Object

org.apache.flink.streaming.api.datastream.temporal.StreamJoinOperator.JoinWindow<I1,I2>

All Implemented Interfaces:

TemporalWindow<StreamJoinOperator.JoinWindow<I1,I2>>

Enclosing class:

StreamJoinOperator<I1,I2>

public static class StreamJoinOperator.JoinWindow<I1,I2>
extends Object
implements TemporalWindow<StreamJoinOperator.JoinWindow<I1,I2>>

Method Summary

Modifier and Type	Method and Description
StreamJoinOperator.JoinWindow<I1,I2>	every(long length) Defines the slide interval for this temporal operator
StreamJoinOperator.JoinWindow<I1,I2>	every(long length, TimeUnit timeUnit) Defines the slide interval for this temporal operator
StreamJoinOperator.JoinPredicate<I1,I2>	where(int... fields) Continues a temporal Join transformation.
<K> StreamJoinOperator.JoinPredicate<I1,I2>	where(org.apache.flink.api.java.functions.KeySelector<I1,K> keySelector) Continues a temporal Join transformation and defines a KeySelector function for the first join DataStream . The KeySelector function is called for each element of the first DataStream and extracts a single key value on which the DataStream is joined.
StreamJoinOperator.JoinPredicate<I1,I2>	where(String... fields) Continues a temporal join transformation.

Methods inherited from class java.lang.Object

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

Method Detail

where

public StreamJoinOperator.JoinPredicate<I1,I2> where(int... fields)

Continues a temporal Join transformation.
Defines the Tuple fields of the first join DataStream that should be used as join keys.
Note: Fields can only be selected as join keys on Tuple DataStreams.

Parameters:

fields - The indexes of the other Tuple fields of the first join DataStreams that should be used as keys.

Returns:

An incomplete Join transformation. Call StreamJoinOperator.JoinPredicate.equalTo(int...) to continue the Join.

where

public StreamJoinOperator.JoinPredicate<I1,I2> where(String... fields)

Continues a temporal join transformation.
Defines the fields of the first join DataStream that should be used as grouping keys. Fields are the names of member fields of the underlying type of the data stream.

Parameters:

fields - The fields of the first join DataStream that should be used as keys.

Returns:

An incomplete Join transformation. Call StreamJoinOperator.JoinPredicate.equalTo(int...) to continue the Join.

where

public <K> StreamJoinOperator.JoinPredicate<I1,I2> where(org.apache.flink.api.java.functions.KeySelector<I1,K> keySelector)

Continues a temporal Join transformation and defines a KeySelector function for the first join DataStream .
The KeySelector function is called for each element of the first DataStream and extracts a single key value on which the DataStream is joined.

Parameters:

keySelector - The KeySelector function which extracts the key values from the DataStream on which it is joined.

Returns:

An incomplete Join transformation. Call StreamJoinOperator.JoinPredicate.equalTo(int...) to continue the Join.

every

public StreamJoinOperator.JoinWindow<I1,I2> every(long length,
                                                  TimeUnit timeUnit)

Description copied from interface: TemporalWindow

Defines the slide interval for this temporal operator

Specified by:

every in interface TemporalWindow<StreamJoinOperator.JoinWindow<I1,I2>>

Parameters:

length - Length of the window

timeUnit - Unit of time

Returns:

The temporal operator with slide interval specified

every

public StreamJoinOperator.JoinWindow<I1,I2> every(long length)

Description copied from interface: TemporalWindow

Defines the slide interval for this temporal operator

Specified by:

every in interface TemporalWindow<StreamJoinOperator.JoinWindow<I1,I2>>

Parameters:

length - Length of the window

Returns:

The temporal operator with slide interval specified