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

Class GroupReduceOperator<IN,OUT>

java.lang.Object
org.apache.flink.streaming.api.operators.AbstractStreamOperator<OUT>
org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<OUT,org.apache.flink.api.common.functions.GroupReduceFunction<IN,OUT>>
org.apache.flink.state.api.output.operators.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.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>>, org.apache.flink.streaming.api.operators.YieldingOperator<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:

  • 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

    combinedWatermark, config, lastRecordAttributes1, lastRecordAttributes2, latencyStats, LOG, metrics, output, processingTimeService, stateHandler, stateKeySelector1, stateKeySelector2, timeServiceManager

  • Constructor Summary

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

  • Method Summary

    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

    beforeInitializeStateHandler, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getStateKeySelector1, getStateKeySelector2, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, isAsyncStateProcessingEnabled, isUsingCustomRawKeyedState, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark, processWatermark, processWatermark1, processWatermark1, processWatermark2, processWatermark2, processWatermarkStatus, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setMailboxExecutor, setProcessingTimeService, snapshotState, useSplittableTimers

    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.api.common.state.CheckpointListener

    notifyCheckpointAborted, notifyCheckpointComplete

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

    processLatencyMarker, processRecordAttributes, processWatermark, 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, getOperatorAttributes, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

  • Constructor Details

    • GroupReduceOperator

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

  • Method Details

    • 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