Package org.apache.flink.table.runtime.operators.wmassigners

Class RowTimeMiniBatchAssginerOperator

java.lang.Object
org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>
org.apache.flink.table.runtime.operators.wmassigners.RowTimeMiniBatchAssginerOperator
All Implemented Interfaces:
Serializable, org.apache.flink.api.common.state.CheckpointListener, org.apache.flink.streaming.api.operators.Input<org.apache.flink.table.data.RowData>, org.apache.flink.streaming.api.operators.KeyContext, org.apache.flink.streaming.api.operators.KeyContextHandler, org.apache.flink.streaming.api.operators.OneInputStreamOperator<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>, org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>, org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.CheckpointedStreamOperator, org.apache.flink.streaming.api.operators.YieldingOperator<org.apache.flink.table.data.RowData>
public class RowTimeMiniBatchAssginerOperator extends org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData> implements org.apache.flink.streaming.api.operators.OneInputStreamOperator<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>
A stream operator that emits watermark in a given event-time interval. This mini-batch assigner works in event time, which means the watermark is forwarded from upstream but filtered by the event-time interval. The downstream operators (e.g. windows) will trigger mini-batch once the received watermark is advanced. So only the watermarks that across the event-time interval boundary (i.e. window-end) will be forwarded. This is for windows to have most efficient mini-batch.

For example, if this operator receives watermarks 0,1,2,3 ..., 19, 20, 21. The downstream operator is a 5-size window aggregate, then the mini-batch interval is 5 (this is inferred by rules). Then only 4, 9, 14, 19 will be forwarded, because they are the watermarks trigger windows.

The difference between this operator and ProcTimeMiniBatchAssignerOperator is that, this operator forwards watermarks from upstream, but the other generates watermarks by itself using processing time.

See Also:

  • Field Summary

    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
    RowTimeMiniBatchAssginerOperator(long minibatchInterval)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    finish()
     
    void
    open()
     
    void
    processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<org.apache.flink.table.data.RowData> element)
     
    void
    processWatermark(org.apache.flink.streaming.api.watermark.Watermark mark)
     

    Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

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

    • RowTimeMiniBatchAssginerOperator

      public RowTimeMiniBatchAssginerOperator(long minibatchInterval)

  • Method Details

    • open

      public void open() throws Exception
      Specified by:
      open in interface org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>
      Overrides:
      open in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>
      Throws:
      Exception

    • processElement

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

    • processWatermark

      public void processWatermark(org.apache.flink.streaming.api.watermark.Watermark mark) throws Exception
      Specified by:
      processWatermark in interface org.apache.flink.streaming.api.operators.Input<org.apache.flink.table.data.RowData>
      Overrides:
      processWatermark in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>
      Throws:
      Exception

    • finish

      public void finish() throws Exception
      Specified by:
      finish in interface org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>
      Overrides:
      finish in class org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>
      Throws:
      Exception