Class SucceededFuture<V>

java.lang.Object

io.netty.util.concurrent.AbstractFuture<V>

io.netty.util.concurrent.CompleteFuture<V>

io.netty.util.concurrent.SucceededFuture<V>

All Implemented Interfaces:

Future<V>, Future<V>

public final class SucceededFuture<V>
extends CompleteFuture<V>

The CompleteFuture which is succeeded already. It is recommended to use EventExecutor.newSucceededFuture(Object) instead of calling the constructor of this future.

Constructor Summary

Constructors

Constructor	Description
SucceededFuture(EventExecutor executor, V result)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
Throwable	cause()	Returns the cause of the failed I/O operation if the I/O operation has failed.
V	getNow()	Return the result without blocking.
boolean	isSuccess()	Returns true if and only if the I/O operation was completed successfully.

Methods inherited from class CompleteFuture

addListener, addListeners, await, await, await, awaitUninterruptibly, awaitUninterruptibly, awaitUninterruptibly, cancel, executor, isCancellable, isCancelled, isDone, removeListener, removeListeners, sync, syncUninterruptibly

Methods inherited from class AbstractFuture

get, get

Methods inherited from class Object

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

Constructor Details

SucceededFuture

public SucceededFuture(EventExecutor executor,
 V result)

Creates a new instance.

Parameters:

executor - the EventExecutor associated with this future

Method Details

cause

public Throwable cause()

Description copied from interface: Future

Returns the cause of the failed I/O operation if the I/O operation has failed.

Returns:

the cause of the failure. null if succeeded or this future is not completed yet.

isSuccess

public boolean isSuccess()

Description copied from interface: Future

Returns true if and only if the I/O operation was completed successfully.

getNow

public V getNow()

Description copied from interface: Future

Return the result without blocking. If the future is not done yet this will return null.

As it is possible that a null value is used to mark the future as successful you also need to check if the future is really done with Future.isDone() and not rely on the returned null value.