org.apache.flink.table.runtime.operators.python.scalar

Class EmbeddedPythonScalarFunctionOperator

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<OUT>

org.apache.flink.streaming.api.operators.python.AbstractPythonFunctionOperator<OUT>

org.apache.flink.streaming.api.operators.python.embedded.AbstractEmbeddedPythonFunctionOperator<RowData>

org.apache.flink.table.runtime.operators.python.AbstractEmbeddedStatelessFunctionOperator

org.apache.flink.table.runtime.operators.python.scalar.EmbeddedPythonScalarFunctionOperator

All Implemented Interfaces:

Serializable, CheckpointListener, BoundedOneInput, Input<RowData>, KeyContext, KeyContextHandler, OneInputStreamOperator<RowData,RowData>, SetupableStreamOperator<RowData>, StreamOperator<RowData>, StreamOperatorStateHandler.CheckpointedStreamOperator, YieldingOperator<RowData>

@Internal
public class EmbeddedPythonScalarFunctionOperator
extends AbstractEmbeddedStatelessFunctionOperator

The Python ScalarFunction operator in embedded Python environment.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.table.runtime.operators.python.AbstractEmbeddedStatelessFunctionOperator

inputType, reuseResultRowData, rowDataWrapper, udfInputOffsets, udfInputType, udfOutputType, userDefinedFunctionInputArgs, userDefinedFunctionInputConverters, userDefinedFunctionOutputConverters

Fields inherited from class org.apache.flink.streaming.api.operators.python.embedded.AbstractEmbeddedPythonFunctionOperator

interpreter

Fields inherited from class org.apache.flink.streaming.api.operators.python.AbstractPythonFunctionOperator

bundleFinishedCallback, config, elementCount, lastFinishBundleTime, maxBundleSize, systemEnvEnabled

Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

chainingStrategy, lastRecordAttributes1, lastRecordAttributes2, latencyStats, LOG, metrics, output, processingTimeService, stateHandler, stateKeySelector1, stateKeySelector2, timeServiceManager

Constructor Summary

Constructors

Constructor and Description
EmbeddedPythonScalarFunctionOperator(Configuration config, PythonFunctionInfo[] scalarFunctions, RowType inputType, RowType udfInputType, RowType udfOutputType, int[] udfInputOffsets, GeneratedProjection forwardedFieldGeneratedProjection)

Method Summary

Modifier and Type	Method and Description
void	endInput() It is notified that no more data will arrive from the input.
void	open() This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g. state initialization.
void	openPythonInterpreter() Setup method for Python Interpreter.
void	processElement(StreamRecord<RowData> element) Processes one element that arrived on this input of the MultipleInputStreamOperator.

Methods inherited from class org.apache.flink.streaming.api.operators.python.embedded.AbstractEmbeddedPythonFunctionOperator

close, createPythonEnvironmentManager, invokeFinishBundle

Methods inherited from class org.apache.flink.streaming.api.operators.python.AbstractPythonFunctionOperator

checkInvokeFinishBundleByCount, finish, getConfiguration, getFlinkMetricContainer, isBundleFinished, prepareSnapshotPreBarrier, processWatermark, setCurrentKey

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getStateKeySelector1, getStateKeySelector2, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setChainingStrategy, setKeyContextElement1, setKeyContextElement2, setMailboxExecutor, setProcessingTimeService, setup, snapshotState, snapshotState, useSplittableTimers

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.streaming.api.operators.OneInputStreamOperator

setKeyContextElement

Methods inherited from interface org.apache.flink.streaming.api.operators.StreamOperator

close, finish, getMetricGroup, getOperatorAttributes, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

Methods inherited from interface org.apache.flink.api.common.state.CheckpointListener

notifyCheckpointAborted, notifyCheckpointComplete

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

Methods inherited from interface org.apache.flink.streaming.api.operators.Input

processLatencyMarker, processRecordAttributes, processWatermark, processWatermarkStatus

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContextHandler

hasKeyContext

Constructor Detail

EmbeddedPythonScalarFunctionOperator

public EmbeddedPythonScalarFunctionOperator(Configuration config,
                                            PythonFunctionInfo[] scalarFunctions,
                                            RowType inputType,
                                            RowType udfInputType,
                                            RowType udfOutputType,
                                            int[] udfInputOffsets,
                                            @Nullable
                                            GeneratedProjection forwardedFieldGeneratedProjection)

Method Detail

open

public void open()
          throws Exception

Description copied from class: AbstractStreamOperator

This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g. state initialization.

The default implementation does nothing.

Specified by:

open in interface StreamOperator<RowData>

Overrides:

open in class AbstractEmbeddedStatelessFunctionOperator

Throws:

Exception - An exception in this method causes the operator to fail.

openPythonInterpreter

public void openPythonInterpreter()

Description copied from class: AbstractEmbeddedPythonFunctionOperator

Setup method for Python Interpreter.

Specified by:

openPythonInterpreter in class AbstractEmbeddedPythonFunctionOperator<RowData>

endInput

public void endInput()

Description copied from interface: BoundedOneInput

It is notified that no more data will arrive from the input.

WARNING: It is not safe to use this method to commit any transactions or other side effects! You can use this method to flush any buffered data that can later on be committed e.g. in a CheckpointListener.notifyCheckpointComplete(long).

NOTE: Given it is semantically very similar to the StreamOperator.finish() method. It might be dropped in favour of the other method at some point in time.

processElement

public void processElement(StreamRecord<RowData> element)

Description copied from interface: Input

Processes one element that arrived on this input of the MultipleInputStreamOperator. This method is guaranteed to not be called concurrently with other methods of the operator.