org.apache.flink.table.runtime.operators.window

类 WindowOperator<K,W extends Window>

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

org.apache.flink.table.runtime.operators.window.WindowOperator<K,W>

类型参数:

K - The type of key returned by the KeySelector.

W - The type of Window that the WindowAssigner assigns.

所有已实现的接口:

Serializable, org.apache.flink.runtime.state.CheckpointListener, org.apache.flink.streaming.api.operators.KeyContext, 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.SetupableStreamOperator<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.Triggerable<K,W>, org.apache.flink.util.Disposable

直接已知子类:

AggregateWindowOperator, TableAggregateWindowOperator

public abstract class WindowOperator<K,W extends Window>
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>, org.apache.flink.streaming.api.operators.Triggerable<K,W>

An operator that implements the logic for windowing based on a WindowAssigner and Trigger.

This is the base class for AggregateWindowOperator and TableAggregateWindowOperator. The big difference between AggregateWindowOperator and TableAggregateWindowOperator is AggregateWindowOperator emits only one result for each aggregate group, while TableAggregateWindowOperator can emit multi results for each aggregate group.

When an element arrives it gets assigned a key using a KeySelector and it gets assigned to zero or more windows using a WindowAssigner. Based on this, the element is put into panes. A pane is the bucket of elements that have the same key and same Window. An element can be in multiple panes if it was assigned to multiple windows by the WindowAssigner.

Each pane gets its own instance of the provided Trigger. This trigger determines when the contents of the pane should be processed to emit results. When a trigger fires, the given NamespaceAggsHandleFunctionBase is invoked to produce the results that are emitted for the pane to which the Trigger belongs.

The parameter types: <IN>: RowData <OUT>: JoinedRowData(KEY, AGG_RESULT) <KEY>: GenericRowData <AGG_RESULT>: GenericRowData <ACC>: GenericRowData

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
protected org.apache.flink.streaming.api.operators.TimestampedCollector<org.apache.flink.table.data.RowData>	collector This is used for emitting elements with a given timestamp.
protected org.apache.flink.runtime.state.internal.InternalValueState<K,W,org.apache.flink.table.data.RowData>	previousState
protected boolean	produceUpdates
protected NamespaceAggsHandleFunctionBase<W>	windowAggregator
protected InternalWindowProcessFunction<K,W>	windowFunction

从类继承的字段 org.apache.flink.streaming.api.operators.AbstractStreamOperator

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

方法概要

限定符和类型	方法和说明
void	close()
protected abstract void	compileGeneratedCode()
void	dispose()
protected abstract void	emitWindowResult(W window) Emits the window result of the given window.
protected org.apache.flink.metrics.Counter	getNumLateRecordsDropped()
protected org.apache.flink.metrics.Gauge<Long>	getWatermarkLatency()
void	onEventTime(org.apache.flink.streaming.api.operators.InternalTimer<K,W> timer)
void	onProcessingTime(org.apache.flink.streaming.api.operators.InternalTimer<K,W> timer)
void	open()
void	processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<org.apache.flink.table.data.RowData> record)

从类继承的方法 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, initializeState, initializeState, notifyCheckpointAborted, notifyCheckpointComplete, numEventTimeTimers, numProcessingTimeTimers, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, setup, snapshotState, snapshotState

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 org.apache.flink.streaming.api.operators.OneInputStreamOperator

processLatencyMarker, processWatermark

从接口继承的方法 org.apache.flink.streaming.api.operators.StreamOperator

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

从接口继承的方法 org.apache.flink.runtime.state.CheckpointListener

notifyCheckpointAborted, notifyCheckpointComplete

从接口继承的方法 org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

字段详细资料

produceUpdates

protected final boolean produceUpdates

windowAggregator

protected NamespaceAggsHandleFunctionBase<W extends Window> windowAggregator

windowFunction

protected transient InternalWindowProcessFunction<K,W extends Window> windowFunction

collector

protected transient org.apache.flink.streaming.api.operators.TimestampedCollector<org.apache.flink.table.data.RowData> collector

This is used for emitting elements with a given timestamp.

previousState

protected transient org.apache.flink.runtime.state.internal.InternalValueState<K,W extends Window,org.apache.flink.table.data.RowData> previousState

方法详细资料

compileGeneratedCode

protected abstract void compileGeneratedCode()

open

public void open()
          throws Exception

指定者:

open 在接口中 org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>

覆盖:

open 在类中 org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

抛出:

Exception

close

public void close()
           throws Exception

指定者:

close 在接口中 org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>

覆盖:

close 在类中 org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

抛出:

Exception

dispose

public void dispose()
             throws Exception

指定者:

dispose 在接口中 org.apache.flink.streaming.api.operators.StreamOperator<org.apache.flink.table.data.RowData>

指定者:

dispose 在接口中 org.apache.flink.util.Disposable

覆盖:

dispose 在类中 org.apache.flink.streaming.api.operators.AbstractStreamOperator<org.apache.flink.table.data.RowData>

抛出:

Exception

processElement

public void processElement(org.apache.flink.streaming.runtime.streamrecord.StreamRecord<org.apache.flink.table.data.RowData> record)
                    throws Exception

指定者:

processElement 在接口中 org.apache.flink.streaming.api.operators.OneInputStreamOperator<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>

抛出:

Exception

onEventTime

public void onEventTime(org.apache.flink.streaming.api.operators.InternalTimer<K,W> timer)
                 throws Exception

指定者:

onEventTime 在接口中 org.apache.flink.streaming.api.operators.Triggerable<K,W extends Window>

抛出:

Exception

onProcessingTime

public void onProcessingTime(org.apache.flink.streaming.api.operators.InternalTimer<K,W> timer)
                      throws Exception

指定者:

onProcessingTime 在接口中 org.apache.flink.streaming.api.operators.Triggerable<K,W extends Window>

抛出:

Exception

emitWindowResult

protected abstract void emitWindowResult(W window)
                                  throws Exception

Emits the window result of the given window.

抛出:

Exception

getNumLateRecordsDropped

protected org.apache.flink.metrics.Counter getNumLateRecordsDropped()

getWatermarkLatency

protected org.apache.flink.metrics.Gauge<Long> getWatermarkLatency()