org.apache.flink.streaming.api.operators

Interface OutputTypeConfigurable<OUT>

All Known Implementing Classes:

AbstractAlignedProcessingTimeWindowOperator, AbstractUdfStreamOperator, AccumulatingProcessingTimeWindowOperator, AggregatingProcessingTimeWindowOperator, ContinuousFileReaderOperator, CoStreamFlatMap, CoStreamMap, EvictingWindowOperator, ExtractTimestampsOperator, FoldApplyAllWindowFunction, FoldApplyWindowFunction, InternalIterableAllWindowFunction, InternalIterableWindowFunction, InternalSingleValueAllWindowFunction, InternalSingleValueWindowFunction, InternalWindowFunction, StoppableStreamSource, StreamFilter, StreamFlatMap, StreamGroupedFold, StreamGroupedReduce, StreamMap, StreamSink, StreamSource, TimestampsAndPeriodicWatermarksOperator, TimestampsAndPunctuatedWatermarksOperator, WindowOperator

@PublicEvolving
public interface OutputTypeConfigurable<OUT>

Stream operators can implement this interface if they need access to the output type information at StreamGraph generation. This can be useful for cases where the output type is specified by the returns method and, thus, after the stream operator has been created.

Method Summary

Modifier and Type	Method and Description
void	setOutputType(org.apache.flink.api.common.typeinfo.TypeInformation<OUT> outTypeInfo, org.apache.flink.api.common.ExecutionConfig executionConfig) Is called by the StreamGraph.addOperator(Integer, String, StreamOperator, TypeInformation, TypeInformation, String) method when the StreamGraph is generated.

Method Detail

setOutputType

void setOutputType(org.apache.flink.api.common.typeinfo.TypeInformation<OUT> outTypeInfo,
                   org.apache.flink.api.common.ExecutionConfig executionConfig)

Is called by the StreamGraph.addOperator(Integer, String, StreamOperator, TypeInformation, TypeInformation, String) method when the StreamGraph is generated. The method is called with the output TypeInformation which is also used for the StreamTask output serializer.

Parameters:

outTypeInfo - Output type information of the StreamTask

executionConfig - Execution configuration