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

Class PythonFlatMapFunction

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.streaming.python.api.functions.AbstractPythonUDF<org.apache.flink.api.common.functions.FlatMapFunction<org.python.core.PyObject,Object>>

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

All Implemented Interfaces:

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

public class PythonFlatMapFunction
extends AbstractPythonUDF<org.apache.flink.api.common.functions.FlatMapFunction<org.python.core.PyObject,Object>>
implements org.apache.flink.api.common.functions.FlatMapFunction<org.python.core.PyObject,org.python.core.PyObject>

The PythonFlatMapFunction is a thin wrapper layer over a Python UDF FlatMapFunction. It receives a FlatMapFunction 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 FlatMapFunction.

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

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.streaming.python.api.functions.AbstractPythonUDF

fun, log

Constructor Summary

Constructors

Constructor and Description
PythonFlatMapFunction(org.apache.flink.api.common.functions.FlatMapFunction<org.python.core.PyObject,Object> fun)

Method Summary

Modifier and Type	Method and Description
void	flatMap(org.python.core.PyObject value, org.apache.flink.util.Collector<org.python.core.PyObject> out)
void	open(org.apache.flink.configuration.Configuration config)

Methods inherited from class org.apache.flink.streaming.python.api.functions.AbstractPythonUDF

close

Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction

getIterationRuntimeContext, getRuntimeContext, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Detail

PythonFlatMapFunction

public PythonFlatMapFunction(org.apache.flink.api.common.functions.FlatMapFunction<org.python.core.PyObject,Object> fun)
                      throws IOException

Throws:

IOException

Method Detail

open

public void open(org.apache.flink.configuration.Configuration config)
          throws Exception

Specified by:

open in interface org.apache.flink.api.common.functions.RichFunction

Overrides:

open in class AbstractPythonUDF<org.apache.flink.api.common.functions.FlatMapFunction<org.python.core.PyObject,Object>>

Throws:

Exception

flatMap

public void flatMap(org.python.core.PyObject value,
                    org.apache.flink.util.Collector<org.python.core.PyObject> out)
             throws Exception

Specified by:

flatMap in interface org.apache.flink.api.common.functions.FlatMapFunction<org.python.core.PyObject,org.python.core.PyObject>

Throws:

Exception