Module org.elasticsearch.server

Package org.elasticsearch.common.util.concurrent

Class ListenableFuture<T>

java.lang.Object

org.elasticsearch.action.support.SubscribableListener<T>

org.elasticsearch.common.util.concurrent.ListenableFuture<T>

All Implemented Interfaces:

ActionListener<T>

public final class ListenableFuture<T>
extends SubscribableListener<T>

An ActionListener which allows for the result to fan out to a (dynamic) collection of other listeners, added using SubscribableListener.addListener(org.elasticsearch.action.ActionListener<T>). Listeners added before completion are retained until completion; listeners added after completion are completed immediately. Similar to ListenableActionFuture and SubscribableListener except for its handling of exceptions: if this listener is completed exceptionally with a checked exception then it wraps the exception in an UncategorizedExecutionException whose cause is an ExecutionException, whose cause in turn is the checked exception. This matches the behaviour of FutureUtils.get(java.util.concurrent.Future<T>).

Constructor Summary

Constructors

Constructor	Description
ListenableFuture()

Method Summary

Modifier and Type	Method	Description
T	result()
protected RuntimeException	wrapException(Exception exception)

Methods inherited from class org.elasticsearch.action.support.SubscribableListener

addListener, addListener, addTimeout, andThen, andThen, andThenAccept, andThenApply, isDone, newFailed, newForked, newSucceeded, onFailure, onResponse, rawResult, wrapAsExecutionException

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.elasticsearch.action.ActionListener

delegateFailure, delegateFailureAndWrap, delegateResponse, map, safeMap

Constructor Details

ListenableFuture

public ListenableFuture()

Method Details

result

public T result()

wrapException

protected RuntimeException wrapException(Exception exception)

Overrides:

wrapException in class SubscribableListener<T>