Package org.elasticsearch.common.util.concurrent

Class AsyncIOProcessor<Item>

java.lang.Object

org.elasticsearch.common.util.concurrent.AsyncIOProcessor<Item>

public abstract class AsyncIOProcessor<Item>
extends Object

This async IO processor allows to batch IO operations and have a single writer processing the write operations. This can be used to ensure that threads can continue with other work while the actual IO operation is still processed by a single worker. A worker in this context can be any caller of the put(Object, Consumer) method since it will hijack a worker if nobody else is currently processing queued items. If the internal queue has reached it's capacity incoming threads might be blocked until other items are processed

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AsyncIOProcessor(org.apache.logging.log4j.Logger logger, int queueSize, ThreadContext threadContext)

Method Summary

Modifier and Type	Method	Description
void	put(Item item, Consumer<Exception> listener)	Adds the given item to the queue.
protected abstract void	write(List<Tuple<Item,Consumer<Exception>>> candidates)	Writes or processes the items out or to disk.

Methods inherited from class java.lang.Object

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

Constructor Detail

AsyncIOProcessor

protected AsyncIOProcessor(org.apache.logging.log4j.Logger logger,
                           int queueSize,
                           ThreadContext threadContext)

Method Detail

put

public final void put(Item item,
                      Consumer<Exception> listener)

Adds the given item to the queue. The listener is notified once the item is processed

write

protected abstract void write(List<Tuple<Item,Consumer<Exception>>> candidates)
                       throws IOException

Writes or processes the items out or to disk.

Throws:

IOException