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

Class SliceAssigners.WindowedSliceAssigner

java.lang.Object

org.apache.flink.table.runtime.operators.window.slicing.SliceAssigners.WindowedSliceAssigner

All Implemented Interfaces:

Serializable, SliceAssigner, SliceUnsharedAssigner

Enclosing class:

SliceAssigners

public static final class SliceAssigners.WindowedSliceAssigner
extends Object
implements SliceUnsharedAssigner

The SliceAssigner for elements have been attached window start and end timestamps.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
WindowedSliceAssigner(int windowEndIndex, SliceAssigner innerAssigner)

Method Summary

Modifier and Type	Method and Description
long	assignSliceEnd(RowData element, ClockService clock) Returns the end timestamp of a slice that the given element should belong.
Iterable<Long>	expiredSlices(long windowEnd) Returns an iterator of slices to expire when the given window is emitted.
long	getLastWindowEnd(long sliceEnd) Returns the last window which the slice belongs to.
long	getSliceEndInterval() Returns the interval of slice ends, i.e.
long	getWindowStart(long windowEnd) Returns the corresponding window start timestamp of the given window end timestamp.
boolean	isEventTime() Returns true if elements are assigned to windows based on event time, false based on processing time.

Methods inherited from class java.lang.Object

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

Constructor Detail

WindowedSliceAssigner

public WindowedSliceAssigner(int windowEndIndex,
                             SliceAssigner innerAssigner)

Method Detail

assignSliceEnd

public long assignSliceEnd(RowData element,
                           ClockService clock)

Description copied from interface: SliceAssigner

Returns the end timestamp of a slice that the given element should belong.

Specified by:

assignSliceEnd in interface SliceAssigner

Parameters:

element - the element to which slice should belong to.

clock - the service to get current processing time.

getLastWindowEnd

public long getLastWindowEnd(long sliceEnd)

Description copied from interface: SliceAssigner

Returns the last window which the slice belongs to. The window and and slices are both identified by the end timestamp.

Specified by:

getLastWindowEnd in interface SliceAssigner

getWindowStart

public long getWindowStart(long windowEnd)

Description copied from interface: SliceAssigner

Returns the corresponding window start timestamp of the given window end timestamp.

Specified by:

getWindowStart in interface SliceAssigner

expiredSlices

public Iterable<Long> expiredSlices(long windowEnd)

Description copied from interface: SliceAssigner

Returns an iterator of slices to expire when the given window is emitted. The window and slices are both identified by the end timestamp.

Specified by:

expiredSlices in interface SliceAssigner

Parameters:

windowEnd - the end timestamp of window emitted.

getSliceEndInterval

public long getSliceEndInterval()

Description copied from interface: SliceAssigner

Returns the interval of slice ends, i.e. the step size to advance of the slice end when a new slice assigned.

Specified by:

getSliceEndInterval in interface SliceAssigner

isEventTime

public boolean isEventTime()

Description copied from interface: SliceAssigner

Returns true if elements are assigned to windows based on event time, false based on processing time.

Specified by:

isEventTime in interface SliceAssigner