org.apache.flink.streaming.api.functions.co

接口 CoMapFunction<IN1,IN2,OUT>

类型参数:

IN1 - Type of the first input.

IN2 - Type of the second input.

OUT - Output type.

所有超级接口:

org.apache.flink.api.common.functions.Function, Serializable

所有已知实现类:

RichCoMapFunction

@Public
public interface CoMapFunction<IN1,IN2,OUT>
extends org.apache.flink.api.common.functions.Function, Serializable

A CoFlatMapFunction implements a map() transformation over two connected streams.

The same instance of the transformation function is used to transform both of the connected streams. That way, the stream transformations can share state.

方法概要

限定符和类型	方法和说明
OUT	map1(IN1 value) This method is called for each element in the first of the connected streams.
OUT	map2(IN2 value) This method is called for each element in the second of the connected streams.

方法详细资料

map1

OUT map1(IN1 value)
  throws Exception

This method is called for each element in the first of the connected streams.

参数:

value - The stream element

返回:

The resulting element

抛出:

Exception - The function may throw exceptions which cause the streaming program to fail and go into recovery.

map2

OUT map2(IN2 value)
  throws Exception

This method is called for each element in the second of the connected streams.

参数:

value - The stream element

返回:

The resulting element

抛出:

Exception - The function may throw exceptions which cause the streaming program to fail and go into recovery.