org.apache.flink.streaming.api.operators.python.embedded

Class AbstractOneInputEmbeddedPythonFunctionOperator<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.embedded.AbstractEmbeddedPythonFunctionOperator<OUT>

org.apache.flink.streaming.api.operators.python.embedded.AbstractEmbeddedDataStreamPythonFunctionOperator<OUT>

org.apache.flink.streaming.api.operators.python.embedded.AbstractOneInputEmbeddedPythonFunctionOperator<IN,OUT>

All Implemented Interfaces:

Serializable, CheckpointListener, ResultTypeQueryable<OUT>, BoundedOneInput, Input<IN>, KeyContext, OneInputStreamOperator<IN,OUT>, DataStreamPythonFunctionOperator<OUT>, SetupableStreamOperator<OUT>, StreamOperator<OUT>, StreamOperatorStateHandler.CheckpointedStreamOperator

Direct Known Subclasses:

EmbeddedPythonKeyedProcessOperator, EmbeddedPythonProcessOperator, EmbeddedPythonWindowOperator

@Internal
public abstract class AbstractOneInputEmbeddedPythonFunctionOperator<IN,OUT>
extends AbstractEmbeddedDataStreamPythonFunctionOperator<OUT>
implements OneInputStreamOperator<IN,OUT>, BoundedOneInput

AbstractOneInputEmbeddedPythonFunctionOperator is responsible for run Python DataStream operators with one input in Embedded Python environment.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected long	timestamp

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

collector, hasSideOutput, outputTypeInfo, sideOutputContext

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, latencyStats, LOG, metrics, output, processingTimeService

Constructor Summary

Constructors

Constructor and Description
AbstractOneInputEmbeddedPythonFunctionOperator(Configuration config, DataStreamPythonFunctionInfo pythonFunctionInfo, TypeInformation<IN> inputTypeInfo, TypeInformation<OUT> outputTypeInfo)

Method Summary

Modifier and Type	Method and Description
abstract List<FlinkFnApi.UserDefinedDataStreamFunction>	createUserDefinedFunctionsProto() Gets the proto representation of the Python user-defined functions to be executed.
void	endInput() It is notified that no more data will arrive from the input.
abstract Object	getFunctionContext() Gets The function context.
abstract Object	getTimerContext() Gets The Timer context.
void	open() This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g.
void	openPythonInterpreter() Setup method for Python Interpreter.
void	processElement(StreamRecord<IN> element) Processes one element that arrived on this input of the MultipleInputStreamOperator.

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

addSideOutputTags, getJobParameters, getProducedType, getPythonFunctionInfo, getSideOutputTags, setNumPartitions

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, getTimeServiceManager, getUserCodeClassloader, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, registerCounterOnOutput, 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, finish, 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, processWatermarkStatus

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

copy

Field Detail

timestamp

protected transient long timestamp

Constructor Detail

AbstractOneInputEmbeddedPythonFunctionOperator

public AbstractOneInputEmbeddedPythonFunctionOperator(Configuration config,
                                                      DataStreamPythonFunctionInfo pythonFunctionInfo,
                                                      TypeInformation<IN> inputTypeInfo,
                                                      TypeInformation<OUT> outputTypeInfo)

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<OUT>

Overrides:

open in class AbstractEmbeddedDataStreamPythonFunctionOperator<OUT>

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<OUT>

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.

Specified by:

endInput in interface BoundedOneInput

processElement

public void processElement(StreamRecord<IN> element)
                    throws Exception

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.

Specified by:

processElement in interface Input<IN>

Throws:

Exception

createUserDefinedFunctionsProto

public abstract List<FlinkFnApi.UserDefinedDataStreamFunction> createUserDefinedFunctionsProto()

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

getFunctionContext

public abstract Object getFunctionContext()

Gets The function context.

getTimerContext

public abstract Object getTimerContext()

Gets The Timer context.