org.apache.flink.streaming.python.api.datastream

Class PythonWindowedStream<W extends org.apache.flink.streaming.api.windowing.windows.Window>

java.lang.Object

org.apache.flink.streaming.python.api.datastream.PythonWindowedStream<W>

@Public
public class PythonWindowedStream<W extends org.apache.flink.streaming.api.windowing.windows.Window>
extends Object

A thin wrapper layer over WindowedStream.

A PythonWindowedStream represents a data stream where elements are grouped by key, and for each key, the stream of elements is split into windows based on a WindowAssigner. Window emission is triggered based on a Trigger.

Method Summary

Modifier and Type	Method and Description
PythonSingleOutputStreamOperator	apply(org.apache.flink.streaming.api.functions.windowing.WindowFunction<org.python.core.PyObject,Object,Object,W> fun) A thin wrapper layer over WindowedStream.apply(WindowFunction).
PythonSingleOutputStreamOperator	reduce(org.apache.flink.api.common.functions.ReduceFunction<org.python.core.PyObject> fun) A thin wrapper layer over WindowedStream.reduce(org.apache.flink.api.common.functions.ReduceFunction).

Methods inherited from class java.lang.Object

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

Method Detail

reduce

public PythonSingleOutputStreamOperator reduce(org.apache.flink.api.common.functions.ReduceFunction<org.python.core.PyObject> fun)
                                        throws IOException

A thin wrapper layer over WindowedStream.reduce(org.apache.flink.api.common.functions.ReduceFunction).

Parameters:

fun - The reduce function.

Returns:

The data stream that is the result of applying the reduce function to the window.

Throws:

IOException

apply

public PythonSingleOutputStreamOperator apply(org.apache.flink.streaming.api.functions.windowing.WindowFunction<org.python.core.PyObject,Object,Object,W> fun)
                                       throws IOException

A thin wrapper layer over WindowedStream.apply(WindowFunction).

Parameters:

fun - The window function.

Returns:

The data stream that is the result of applying the window function to the window.

Throws:

IOException