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

Class AbstractStatelessFunctionOperator<IN,OUT,UDFIN>

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.AbstractOneInputPythonFunctionOperator<IN,OUT>

org.apache.flink.table.runtime.operators.python.AbstractStatelessFunctionOperator<IN,OUT,UDFIN>

Type Parameters:

IN - Type of the input elements.

OUT - Type of the output elements.

UDFIN - Type of the UDF input type.

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.streaming.api.operators.BoundedOneInput, org.apache.flink.streaming.api.operators.Input<IN>, org.apache.flink.streaming.api.operators.KeyContext, org.apache.flink.streaming.api.operators.OneInputStreamOperator<IN,OUT>, org.apache.flink.streaming.api.operators.SetupableStreamOperator<OUT>, org.apache.flink.streaming.api.operators.StreamOperator<OUT>, org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.CheckpointedStreamOperator, org.apache.flink.util.Disposable

Direct Known Subclasses:

AbstractArrowPythonAggregateFunctionOperator, AbstractPythonScalarFunctionOperator, AbstractPythonTableFunctionOperator

@Internal
public abstract class AbstractStatelessFunctionOperator<IN,OUT,UDFIN>
extends AbstractOneInputPythonFunctionOperator<IN,OUT>

Base class for all stream operators to execute Python Stateless Functions.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.flink.core.memory.ByteArrayInputStreamWithPos	bais Reusable InputStream used to holding the execution results to be deserialized.
protected org.apache.flink.core.memory.DataInputViewStreamWrapper	baisWrapper InputStream Wrapper.
protected org.apache.flink.core.memory.ByteArrayOutputStreamWithPos	baos Reusable OutputStream used to holding the serialized input elements.
protected org.apache.flink.core.memory.DataOutputViewStreamWrapper	baosWrapper OutputStream Wrapper.
protected LinkedList<IN>	forwardedInputQueue The queue holding the input elements for which the execution results have not been received.
protected org.apache.flink.table.types.logical.RowType	inputType The input logical type.
protected org.apache.flink.table.types.logical.RowType	outputType The output logical type.
protected int[]	userDefinedFunctionInputOffsets The offsets of user-defined function inputs.
protected org.apache.flink.table.types.logical.RowType	userDefinedFunctionInputType The user-defined function input logical type.
protected org.apache.flink.table.types.logical.RowType	userDefinedFunctionOutputType The user-defined function output logical type.

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

elementCount, maxBundleSize, pythonFunctionRunner

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

chainingStrategy, latencyStats, LOG, metrics, output, processingTimeService

Constructor Summary

Constructors

Constructor and Description
AbstractStatelessFunctionOperator(org.apache.flink.configuration.Configuration config, org.apache.flink.table.types.logical.RowType inputType, org.apache.flink.table.types.logical.RowType outputType, int[] userDefinedFunctionInputOffsets)

Method Summary

Modifier and Type	Method and Description
abstract void	bufferInput(IN input) Buffers the specified input, it will be used to construct the operator result together with the user-defined function execution result.
PythonFunctionRunner	createPythonFunctionRunner() Creates the PythonFunctionRunner which is responsible for Python user-defined function execution.
abstract UDFIN	getFunctionInput(IN element)
abstract String	getFunctionUrn()
abstract String	getInputOutputCoderUrn()
abstract FlinkFnApi.UserDefinedFunctions	getUserDefinedFunctionsProto() Gets the proto representation of the Python user-defined functions to be executed.
void	open()
void	processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN> element)
abstract void	processElementInternal(IN value)

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

endInput

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

checkInvokeFinishBundleByCount, close, createPythonEnvironmentManager, dispose, emitResult, emitResults, getConfig, getFlinkMetricContainer, getPythonConfig, getPythonEnv, invokeFinishBundle, isBundleFinished, prepareSnapshotPreBarrier, processWatermark, setCurrentKey, setPythonConfig

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, getTimeServiceManager, getUserCodeClassloader, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark1, processWatermark2, reportOrForwardLatencyMarker, setChainingStrategy, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, setup, snapshotState, snapshotState

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, dispose, getMetricGroup, 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, processWatermark

Field Detail

inputType

protected final org.apache.flink.table.types.logical.RowType inputType

The input logical type.

outputType

protected final org.apache.flink.table.types.logical.RowType outputType

The output logical type.

userDefinedFunctionInputOffsets

protected final int[] userDefinedFunctionInputOffsets

The offsets of user-defined function inputs.

userDefinedFunctionInputType

protected transient org.apache.flink.table.types.logical.RowType userDefinedFunctionInputType

The user-defined function input logical type.

userDefinedFunctionOutputType

protected transient org.apache.flink.table.types.logical.RowType userDefinedFunctionOutputType

The user-defined function output logical type.

forwardedInputQueue

protected transient LinkedList<IN> forwardedInputQueue

The queue holding the input elements for which the execution results have not been received.

bais

protected transient org.apache.flink.core.memory.ByteArrayInputStreamWithPos bais

Reusable InputStream used to holding the execution results to be deserialized.

baisWrapper

protected transient org.apache.flink.core.memory.DataInputViewStreamWrapper baisWrapper

InputStream Wrapper.

baos

protected transient org.apache.flink.core.memory.ByteArrayOutputStreamWithPos baos

Reusable OutputStream used to holding the serialized input elements.

baosWrapper

protected transient org.apache.flink.core.memory.DataOutputViewStreamWrapper baosWrapper

OutputStream Wrapper.

Constructor Detail

AbstractStatelessFunctionOperator

public AbstractStatelessFunctionOperator(org.apache.flink.configuration.Configuration config,
                                         org.apache.flink.table.types.logical.RowType inputType,
                                         org.apache.flink.table.types.logical.RowType outputType,
                                         int[] userDefinedFunctionInputOffsets)

Method Detail

open

public void open()
          throws Exception

Specified by:

open in interface org.apache.flink.streaming.api.operators.StreamOperator<OUT>

Overrides:

open in class AbstractPythonFunctionOperator<OUT>

Throws:

Exception

processElement

public void processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN> element)
                    throws Exception

Throws:

Exception

createPythonFunctionRunner

public PythonFunctionRunner createPythonFunctionRunner()
                                                throws IOException

Description copied from class: AbstractPythonFunctionOperator

Creates the PythonFunctionRunner which is responsible for Python user-defined function execution.

Specified by:

createPythonFunctionRunner in class AbstractPythonFunctionOperator<OUT>

Throws:

IOException

bufferInput

public abstract void bufferInput(IN input)
                          throws Exception

Buffers the specified input, it will be used to construct the operator result together with the user-defined function execution result.

Throws:

Exception

getFunctionInput

public abstract UDFIN getFunctionInput(IN element)

getUserDefinedFunctionsProto

public abstract FlinkFnApi.UserDefinedFunctions getUserDefinedFunctionsProto()

Gets the proto representation of the Python user-defined functions to be executed.

getInputOutputCoderUrn

public abstract String getInputOutputCoderUrn()

getFunctionUrn

public abstract String getFunctionUrn()

processElementInternal

public abstract void processElementInternal(IN value)
                                     throws Exception

Throws:

Exception