org.apache.flink.streaming.runtime.watermarkstatus

Class StatusWatermarkValve.InputChannelStatus

java.lang.Object

org.apache.flink.streaming.runtime.watermarkstatus.StatusWatermarkValve.InputChannelStatus

Enclosing class:

StatusWatermarkValve

@VisibleForTesting
protected static class StatusWatermarkValve.InputChannelStatus
extends Object

An InputChannelStatus keeps track of an input channel's last watermark, stream status, and whether or not the channel's current watermark is aligned with the overall watermark output from the valve.

There are 2 situations where a channel's watermark is not considered aligned:

• the current watermark status of the channel is idle
• the watermark status has resumed to be active, but the watermark of the channel hasn't caught up to the last output watermark from the valve yet.

NOTE: This class implements HeapPriorityQueue.HeapPriorityQueueElement to be managed by StatusWatermarkValve.alignedChannelStatuses to help find minimum watermark.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	isWatermarkAligned
static int	NOT_CONTAINED The index that indicates that a HeapPriorityQueueElement object is not contained in and managed by any HeapPriorityQueue.
protected long	watermark
protected WatermarkStatus	watermarkStatus

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	InputChannelStatus()

Method Summary

Modifier and Type	Method and Description
int	getInternalIndex() Returns the current index of this object in the internal array of HeapPriorityQueue.
void	setInternalIndex(int newIndex) Sets the current index of this object in the HeapPriorityQueue and should only be called by the owning HeapPriorityQueue.

Methods inherited from class java.lang.Object

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

Field Detail

watermark

protected long watermark

watermarkStatus

protected WatermarkStatus watermarkStatus

isWatermarkAligned

protected boolean isWatermarkAligned

NOT_CONTAINED

public static final int NOT_CONTAINED

The index that indicates that a HeapPriorityQueueElement object is not contained in and managed by any HeapPriorityQueue. We do not strictly enforce that internal indexes must be reset to this value when elements are removed from a HeapPriorityQueue.

See Also:

Constant Field Values

Constructor Detail

InputChannelStatus

protected InputChannelStatus()

Method Detail

getInternalIndex

public int getInternalIndex()

Returns the current index of this object in the internal array of HeapPriorityQueue.

setInternalIndex

public void setInternalIndex(int newIndex)

Sets the current index of this object in the HeapPriorityQueue and should only be called by the owning HeapPriorityQueue.

Parameters:

newIndex - the new index in the timer heap.