Package io.pravega.common.concurrent

Class MultiKeyLatestItemSequentialProcessor<KeyType,ItemType>

java.lang.Object

io.pravega.common.concurrent.MultiKeyLatestItemSequentialProcessor<KeyType,ItemType>

Type Parameters:

KeyType - The type of the key to be processed.

ItemType - The type of item to be processed.

public class MultiKeyLatestItemSequentialProcessor<KeyType,ItemType>
extends java.lang.Object

Provides a way to run a function on Key Value Pairs but guarantees that the function is only invoked for one item at a time per key. If multiple 'updates' to a particular key are provided while the processor is running, only the most recent is passed to the function. This allows it to 'skip' updates for keys that are not the most recent value.

Constructor Summary

Constructors

Constructor	Description
MultiKeyLatestItemSequentialProcessor(java.util.function.BiConsumer<KeyType,ItemType> processFunction, java.util.concurrent.Executor executor)

Method Summary

Modifier and Type	Method	Description
void	updateItem(KeyType key, ItemType newItem)	Updates the item and triggers it to be processed.

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiKeyLatestItemSequentialProcessor

public MultiKeyLatestItemSequentialProcessor(java.util.function.BiConsumer<KeyType,ItemType> processFunction,
                                             java.util.concurrent.Executor executor)

Method Detail

updateItem

public void updateItem(KeyType key,
                       ItemType newItem)

Updates the item and triggers it to be processed.

Parameters:

key - The key of the item to be processed (Cannot be null)

newItem - The item to be processed. (Cannot be null)