org.apache.flink.streaming.api.operators

Interface OneInputStreamOperator<IN,OUT>

Type Parameters:

IN - The input type of the operator

OUT - The output type of the operator

All Superinterfaces:

Serializable, StreamOperator<OUT>

All Known Implementing Classes:

AbstractAlignedProcessingTimeWindowOperator, AccumulatingProcessingTimeWindowOperator, AggregatingProcessingTimeWindowOperator, BucketStreamSortOperator, EvictingNonKeyedWindowOperator, EvictingWindowOperator, ExtractTimestampsOperator, NonKeyedWindowOperator, StreamCounter, StreamFilter, StreamFlatMap, StreamGroupedFold, StreamGroupedReduce, StreamMap, StreamProject, StreamSink, WindowOperator

public interface OneInputStreamOperator<IN,OUT>
extends StreamOperator<OUT>

Interface for stream operators with one input. Use AbstractStreamOperator as a base class if you want to implement a custom operator.

Method Summary

Methods

Modifier and Type	Method and Description
void	processElement(StreamRecord<IN> element) Processes one element that arrived at this operator.
void	processWatermark(Watermark mark) Processes a Watermark.

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

close, dispose, getChainingStrategy, isInputCopyingDisabled, notifyOfCompletedCheckpoint, open, restoreState, setChainingStrategy, setKeyContextElement, setup, snapshotOperatorState

Method Detail

processElement

void processElement(StreamRecord<IN> element)
                    throws Exception

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

Throws:

Exception

processWatermark

void processWatermark(Watermark mark)
                      throws Exception

Processes a Watermark. This method is guaranteed to not be called concurrently with other methods of the operator.

Throws:

Exception

See Also:

Watermark