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

类 KeyByKeySelector

java.lang.Object

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

所有已实现的接口:

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

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

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.

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
KeyByKeySelector(boolean isKeyPickledByteArray)

方法概要

限定符和类型	方法和说明
Object	getKey(org.apache.flink.types.Row value)

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

KeyByKeySelector

public KeyByKeySelector(boolean isKeyPickledByteArray)

方法详细资料

getKey

public Object getKey(org.apache.flink.types.Row value)
              throws Exception

指定者:

getKey 在接口中 org.apache.flink.api.java.functions.KeySelector<org.apache.flink.types.Row,Object>

抛出:

Exception