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

Interface Input<IN>

All Known Subinterfaces:
OneInputStreamOperator<IN,OUT>
All Known Implementing Classes:
AsyncEvictingWindowOperator, AsyncKeyedProcessOperator, AsyncStreamFlatMap, AsyncWindowOperator, BatchGroupedReduceOperator, CacheTransformationTranslator.IdentityStreamOperator, CacheTransformationTranslator.NoOpStreamOperator, CollectSinkOperator, ContinuousFileReaderOperator, EvictingWindowOperator, FinishedOnRestoreInput, GlobalCommitterOperator, KeyedProcessOperator, KeyedSortPartitionOperator, LegacyKeyedProcessOperator, MapPartitionOperator, PartitionAggregateOperator, PartitionReduceOperator, ProcessOperator, QueryableAppendingStateOperator, QueryableValueStateOperator, SortPartitionOperator, StreamFilter, StreamFlatMap, StreamGroupedReduceAsyncStateOperator, StreamGroupedReduceOperator, StreamMap, StreamProject, StreamSink, TimestampsAndWatermarksOperator, WindowOperator
@PublicEvolving public interface Input<IN>
Input interface used in MultipleInputStreamOperator. Most likely you don't want to implement this interface on your own. Instead you can use AbstractInput and AbstractStreamOperatorV2 to implement MultipleInputStreamOperator, or just AbstractStreamOperatorV2 to implement OneInputStreamOperator.

  • Method Details

    • processElement

      void processElement(StreamRecord<IN> element) throws Exception
      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.
      Throws:
      Exception

    • processWatermark

      void processWatermark(Watermark mark) throws Exception
      Processes a Watermark that arrived on the first input of this two-input operator. This method is guaranteed to not be called concurrently with other methods of the operator.
      Throws:
      Exception
      See Also:

    • processWatermarkStatus

      void processWatermarkStatus(WatermarkStatus watermarkStatus) throws Exception
      Processes a WatermarkStatus that arrived on this input of the MultipleInputStreamOperator. This method is guaranteed to not be called concurrently with other methods of the operator.
      Throws:
      Exception
      See Also:

    • processLatencyMarker

      void processLatencyMarker(LatencyMarker latencyMarker) throws Exception
      Processes a LatencyMarker that arrived on the first input of this two-input operator. This method is guaranteed to not be called concurrently with other methods of the operator.
      Throws:
      Exception
      See Also:

    • setKeyContextElement

      void setKeyContextElement(StreamRecord<IN> record) throws Exception
      Set the correct key context before processing the record. Used for example to extract key from the record and pass that key to the state backends. This method is guaranteed to not be called concurrently with other methods of the operator.
      Throws:
      Exception

    • processRecordAttributes

      @Experimental default void processRecordAttributes(RecordAttributes recordAttributes) throws Exception
      Processes a RecordAttributes that arrived at this input. This method is guaranteed to not be called concurrently with other methods of the operator.
      Throws:
      Exception

    • processWatermark

      @Experimental default void processWatermark(WatermarkEvent watermark) throws Exception
      Processes a Watermark that arrived at this input, wrapped in a WatermarkEvent.
      Throws:
      Exception