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

Class PythonReduceFunction

java.lang.Object

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

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.ReduceFunction<org.python.core.PyObject>

public class PythonReduceFunction
extends Object
implements org.apache.flink.api.common.functions.ReduceFunction<org.python.core.PyObject>

The PythonReduceFunction is a thin wrapper layer over a Python UDF ReduceFunction. It receives a ReduceFunction as an input and keeps it internally in a serialized form. It is then delivered, as part of the job graph, up to the TaskManager, then it is opened and becomes a sort of mediator to the Python UDF ReduceFunction.

This function is used internally by the Python thin wrapper layer over the streaming data functionality

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PythonReduceFunction(org.apache.flink.api.common.functions.ReduceFunction<org.python.core.PyObject> fun)

Method Summary

Modifier and Type	Method and Description
org.python.core.PyObject	reduce(org.python.core.PyObject value1, org.python.core.PyObject value2)

Methods inherited from class java.lang.Object

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

Constructor Detail

PythonReduceFunction

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

Throws:

IOException

Method Detail

reduce

public org.python.core.PyObject reduce(org.python.core.PyObject value1,
                                       org.python.core.PyObject value2)
                                throws Exception

Specified by:

reduce in interface org.apache.flink.api.common.functions.ReduceFunction<org.python.core.PyObject>

Throws:

Exception