Package org.apache.flink.runtime.asyncprocessing

Class KeyAccountingUnit<K>

java.lang.Object

org.apache.flink.runtime.asyncprocessing.KeyAccountingUnit<K>

Type Parameters:

K - the type of key

public class KeyAccountingUnit<K>
extends Object

Key accounting unit holds the current in-flight key and tracks the corresponding ongoing records, which is used to preserve the ordering of independent chained StateFuture.

Constructor Summary

Constructors

Constructor	Description
KeyAccountingUnit(int initCapacity)

Method Summary

Modifier and Type	Method	Description
int	occupiedCount()
boolean	occupy(Object record, K key)	Occupy a key for processing, the subsequent records with the same key would be blocked until the previous key release.
void	release(Object record, K key)	Release a key, which is invoked when a RecordContext is released.

Methods inherited from class java.lang.Object

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

Constructor Details

KeyAccountingUnit

public KeyAccountingUnit(int initCapacity)

Method Details

occupy

public boolean occupy(Object record,
 K key)

Occupy a key for processing, the subsequent records with the same key would be blocked until the previous key release.

Returns:

true if no one is occupying this key, and this record succeeds to take it.

release

public void release(Object record,
 K key)

Release a key, which is invoked when a RecordContext is released.

occupiedCount

@VisibleForTesting
public int occupiedCount()