Package org.apache.flink.streaming.api.operators.python.process

Class AbstractExternalOneInputPythonFunctionOperator<IN,OUT>

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.process.AbstractExternalPythonFunctionOperator<OUT>

org.apache.flink.streaming.api.operators.python.process.AbstractExternalDataStreamPythonFunctionOperator<OUT>

org.apache.flink.streaming.api.operators.python.process.AbstractExternalOneInputPythonFunctionOperator<IN,OUT>

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.api.java.typeutils.ResultTypeQueryable<OUT>, 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.KeyContextHandler, org.apache.flink.streaming.api.operators.OneInputStreamOperator<IN,OUT>, DataStreamPythonFunctionOperator<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

Direct Known Subclasses:

ExternalPythonKeyedProcessOperator, ExternalPythonProcessOperator

@Internal
public abstract class AbstractExternalOneInputPythonFunctionOperator<IN,OUT>
extends AbstractExternalDataStreamPythonFunctionOperator<OUT>
implements org.apache.flink.streaming.api.operators.OneInputStreamOperator<IN,OUT>, org.apache.flink.streaming.api.operators.BoundedOneInput

AbstractExternalOneInputPythonFunctionOperator is responsible for launching beam runner which will start a python harness to execute user defined python function.

The operator will buffer the timestamp of input elements in a queue, and set into the produced output element.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
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.

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

pythonFunctionRunner

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

Constructor Summary

Constructors

Constructor	Description
AbstractExternalOneInputPythonFunctionOperator(org.apache.flink.configuration.Configuration config, DataStreamPythonFunctionInfo pythonFunctionInfo, org.apache.flink.api.common.typeinfo.TypeInformation<IN> inputTypeInfo, org.apache.flink.api.common.typeinfo.TypeInformation<OUT> outputTypeInfo)

Method Summary

Modifier and Type	Method	Description
FlinkFnApi.CoderInfoDescriptor	createInputCoderInfoDescriptor()
FlinkFnApi.CoderInfoDescriptor	createOutputCoderInfoDescriptor()
void	emitResult(org.apache.flink.api.java.tuple.Tuple3<String,byte[],Integer> resultTuple)	Sends the execution result to the downstream operator.
void	endInput()
org.apache.flink.api.common.typeinfo.TypeInformation<IN>	getInputTypeInfo()
void	open()
void	processElement(long timestamp, long watermark, Object element)

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

addSideOutputTags, createSideOutputCoderDescriptors, getInternalParameters, getOutputTagById, getProducedType, getPythonEnv, getPythonFunctionInfo, getSideOutputTags, getSideOutputTypeSerializerById, setNumPartitions

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

close, createPythonEnvironmentManager, createPythonFunctionRunner, emitResults, 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, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, 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.api.common.state.CheckpointListener

notifyCheckpointAborted, notifyCheckpointComplete

Methods inherited from interface org.apache.flink.streaming.api.operators.python.DataStreamPythonFunctionOperator

copy

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

processElement, processLatencyMarker, processRecordAttributes, processWatermark, processWatermarkStatus

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

getCurrentKey, setCurrentKey

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

hasKeyContext

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, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

Field Detail

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

AbstractExternalOneInputPythonFunctionOperator

public AbstractExternalOneInputPythonFunctionOperator(org.apache.flink.configuration.Configuration config,
                                                      DataStreamPythonFunctionInfo pythonFunctionInfo,
                                                      org.apache.flink.api.common.typeinfo.TypeInformation<IN> inputTypeInfo,
                                                      org.apache.flink.api.common.typeinfo.TypeInformation<OUT> outputTypeInfo)

Method Detail

open

public void open()
          throws Exception

Specified by:

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

Overrides:

open in class AbstractExternalDataStreamPythonFunctionOperator<OUT>

Throws:

Exception

endInput

public void endInput()
              throws Exception

Specified by:

endInput in interface org.apache.flink.streaming.api.operators.BoundedOneInput

Throws:

Exception

emitResult

public void emitResult(org.apache.flink.api.java.tuple.Tuple3<String,byte[],Integer> resultTuple)
                throws Exception

Description copied from class: AbstractExternalPythonFunctionOperator

Sends the execution result to the downstream operator.

Specified by:

emitResult in class AbstractExternalPythonFunctionOperator<OUT>

Throws:

Exception

processElement

public void processElement(long timestamp,
                           long watermark,
                           Object element)
                    throws Exception

Throws:

Exception

createInputCoderInfoDescriptor

public FlinkFnApi.CoderInfoDescriptor createInputCoderInfoDescriptor()

createOutputCoderInfoDescriptor

public FlinkFnApi.CoderInfoDescriptor createOutputCoderInfoDescriptor()

getInputTypeInfo

public org.apache.flink.api.common.typeinfo.TypeInformation<IN> getInputTypeInfo()