Package org.apache.flink.streaming.api.functions.python

Class KeyByKeySelector

java.lang.Object

org.apache.flink.streaming.api.functions.python.KeyByKeySelector

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.java.functions.KeySelector<org.apache.flink.types.Row,org.apache.flink.types.Row>

@Internal
public class KeyByKeySelector
extends Object
implements org.apache.flink.api.java.functions.KeySelector<org.apache.flink.types.Row,org.apache.flink.types.Row>

KeyByKeySelector is responsible for extracting the first field of the input row as key. The input row is generated by python DataStream map function in the format of (key_selector.get_key(value), value) tuple2.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
KeyByKeySelector()

Method Summary

Modifier and Type	Method	Description
org.apache.flink.types.Row	getKey(org.apache.flink.types.Row value)

Methods inherited from class java.lang.Object

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

Constructor Details

KeyByKeySelector

public KeyByKeySelector()

Method Details

getKey

public org.apache.flink.types.Row getKey(org.apache.flink.types.Row value)

Specified by:

getKey in interface org.apache.flink.api.java.functions.KeySelector<org.apache.flink.types.Row,org.apache.flink.types.Row>