Package org.apache.flink.state.api.output.operators

Class GroupReduceOperator<IN,​OUT>

  • Type Parameters:
    IN - Type of the elements that this function processes.
    OUT - The type of the elements returned by the user-defined function.
    All Implemented Interfaces:
    Serializable, org.apache.flink.api.common.state.CheckpointListener, 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>, org.apache.flink.streaming.api.operators.OutputTypeConfigurable<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, org.apache.flink.streaming.api.operators.UserFunctionProvider<org.apache.flink.api.common.functions.GroupReduceFunction<IN,​OUT>>
    @Internal
public class GroupReduceOperator<IN,​OUT>
extends org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,​org.apache.flink.api.common.functions.GroupReduceFunction<IN,​OUT>>
implements org.apache.flink.streaming.api.operators.OneInputStreamOperator<IN,​OUT>
    An operator for executing a GroupReduceFunction on a bounded DataStream.
    See Also:
    Serialized Form

    • Field Summary

      • Fields inherited from class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator

        userFunction

      • Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

        chainingStrategy, config, latencyStats, LOG, metrics, output, processingTimeService

    • Constructor Summary

      Constructors 
      Constructor Description
      GroupReduceOperator​(org.apache.flink.api.common.functions.GroupReduceFunction<IN,​OUT> userFunction)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void finish()  
      void open()  
      void processElement​(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN> element)  

      • Methods inherited from class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator

        close, getUserFunction, getUserFunctionParameters, initializeState, notifyCheckpointAborted, notifyCheckpointComplete, setOutputType, setup, snapshotState

      • 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, isUsingCustomRawKeyedState, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, snapshotState

      • Methods inherited from interface org.apache.flink.api.common.state.CheckpointListener

        notifyCheckpointAborted, notifyCheckpointComplete

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

        processLatencyMarker, 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, getMetricGroup, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

    • Constructor Detail

      • GroupReduceOperator

        public GroupReduceOperator​(org.apache.flink.api.common.functions.GroupReduceFunction<IN,​OUT> userFunction)

    • 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 org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,​org.apache.flink.api.common.functions.GroupReduceFunction<IN,​OUT>>
        Throws:
        Exception

      • processElement

        public void processElement​(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN> element)
                    throws Exception
        Specified by:
        processElement in interface org.apache.flink.streaming.api.operators.Input<IN>
        Throws:
        Exception

      • finish

        public void finish()
            throws Exception
        Specified by:
        finish in interface org.apache.flink.streaming.api.operators.StreamOperator<IN>
        Overrides:
        finish in class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,​org.apache.flink.api.common.functions.GroupReduceFunction<IN,​OUT>>
        Throws:
        Exception