Future (Netty 4.1.109.Final API文档 - 即时通讯网(52im.net))

所有超级接口:

java.util.concurrent.Future<V>

所有已知子接口:

ChannelFuture, ChannelGroupFuture, ChannelProgressiveFuture, ChannelProgressivePromise, ChannelPromise, ProgressiveFuture<V>, ProgressivePromise<V>, Promise<V>, ScheduledFuture<V>

所有已知实现类:

DefaultChannelProgressivePromise, DefaultChannelPromise, DefaultProgressivePromise, DefaultPromise, DelegatingChannelPromiseNotifier, VoidChannelPromise
```
public interface Future<V>
extends java.util.concurrent.Future<V>
```
The result of an asynchronous operation.

方法概要

All Methods Instance Methods Abstract Methods
限定符和类型	方法和说明
`Future<V>`	`addListener(GenericFutureListener<? extends Future<? super V>> listener)` Adds the specified listener to this future.
`Future<V>`	`addListeners(GenericFutureListener<? extends Future<? super V>>... listeners)` Adds the specified listeners to this future.
`Future<V>`	`await()` Waits for this future to be completed.
`boolean`	`await(long timeoutMillis)` Waits for this future to be completed within the specified time limit.
`boolean`	`await(long timeout, java.util.concurrent.TimeUnit unit)` Waits for this future to be completed within the specified time limit.
`Future<V>`	`awaitUninterruptibly()` Waits for this future to be completed without interruption.
`boolean`	`awaitUninterruptibly(long timeoutMillis)` Waits for this future to be completed within the specified time limit without interruption.
`boolean`	`awaitUninterruptibly(long timeout, java.util.concurrent.TimeUnit unit)` Waits for this future to be completed within the specified time limit without interruption.
`boolean`	`cancel(boolean mayInterruptIfRunning)` If the cancellation was successful it will fail the future with a `CancellationException`.
`java.lang.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`	`isCancellable()` returns `true` if and only if the operation can be cancelled via `cancel(boolean)`.
`boolean`	`isSuccess()` Returns `true` if and only if the I/O operation was completed successfully.
`Future<V>`	`removeListener(GenericFutureListener<? extends Future<? super V>> listener)` Removes the first occurrence of the specified listener from this future.
`Future<V>`	`removeListeners(GenericFutureListener<? extends Future<? super V>>... listeners)` Removes the first occurrence for each of the listeners from this future.
`Future<V>`	`sync()` Waits for this future until it is done, and rethrows the cause of the failure if this future failed.
`Future<V>`	`syncUninterruptibly()` Waits for this future until it is done, and rethrows the cause of the failure if this future failed.

从接口继承的方法 java.util.concurrent.Future
get, get, isCancelled, isDone

- 方法详细资料
  - isSuccess
```
boolean isSuccess()
```
    Returns true if and only if the I/O operation was completed successfully.
  - isCancellable
```
boolean isCancellable()
```
    returns true if and only if the operation can be cancelled via cancel(boolean).
  - cause
```
java.lang.Throwable cause()
```
    Returns the cause of the failed I/O operation if the I/O operation has failed.
    
    返回:
    
    the cause of the failure. null if succeeded or this future is not completed yet.
  - addListener
```
Future<V> addListener(GenericFutureListener<? extends Future<? super V>> listener)
```
    Adds the specified listener to this future. The specified listener is notified when this future is done. If this future is already completed, the specified listener is notified immediately.
  - addListeners
```
Future<V> addListeners(GenericFutureListener<? extends Future<? super V>>... listeners)
```
    Adds the specified listeners to this future. The specified listeners are notified when this future is done. If this future is already completed, the specified listeners are notified immediately.
  - removeListener
```
Future<V> removeListener(GenericFutureListener<? extends Future<? super V>> listener)
```
    Removes the first occurrence of the specified listener from this future. The specified listener is no longer notified when this future is done. If the specified listener is not associated with this future, this method does nothing and returns silently.
  - removeListeners
```
Future<V> removeListeners(GenericFutureListener<? extends Future<? super V>>... listeners)
```
    Removes the first occurrence for each of the listeners from this future. The specified listeners are no longer notified when this future is done. If the specified listeners are not associated with this future, this method does nothing and returns silently.
  - sync
```
Future<V> sync()
        throws java.lang.InterruptedException
```
    Waits for this future until it is done, and rethrows the cause of the failure if this future failed.
    
    抛出:
    
    java.lang.InterruptedException
  - syncUninterruptibly
```
Future<V> syncUninterruptibly()
```
    Waits for this future until it is done, and rethrows the cause of the failure if this future failed.
  - await
```
Future<V> await()
         throws java.lang.InterruptedException
```
    Waits for this future to be completed.
    
    抛出:
    
    java.lang.InterruptedException - if the current thread was interrupted
  - awaitUninterruptibly
```
Future<V> awaitUninterruptibly()
```
    Waits for this future to be completed without interruption. This method catches an InterruptedException and discards it silently.
  - await
```
boolean await(long timeout,
              java.util.concurrent.TimeUnit unit)
       throws java.lang.InterruptedException
```
    Waits for this future to be completed within the specified time limit.
    
    返回:
    
    true if and only if the future was completed within the specified time limit
    
    抛出:
    
    java.lang.InterruptedException - if the current thread was interrupted
  - await
```
boolean await(long timeoutMillis)
       throws java.lang.InterruptedException
```
    Waits for this future to be completed within the specified time limit.
    
    返回:
    
    true if and only if the future was completed within the specified time limit
    
    抛出:
    
    java.lang.InterruptedException - if the current thread was interrupted
  - awaitUninterruptibly
```
boolean awaitUninterruptibly(long timeout,
                             java.util.concurrent.TimeUnit unit)
```
    Waits for this future to be completed within the specified time limit without interruption. This method catches an InterruptedException and discards it silently.
    
    返回:
    
    true if and only if the future was completed within the specified time limit
  - awaitUninterruptibly
```
boolean awaitUninterruptibly(long timeoutMillis)
```
    Waits for this future to be completed within the specified time limit without interruption. This method catches an InterruptedException and discards it silently.
    
    返回:
    
    true if and only if the future was completed within the specified time limit
  - getNow
```
V getNow()
```
    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.
  - cancel
```
boolean cancel(boolean mayInterruptIfRunning)
```
    If the cancellation was successful it will fail the future with a CancellationException.
    
    指定者:
    
    cancel 在接口中 java.util.concurrent.Future<V>

接口 Future<V>

方法概要

从接口继承的方法 java.util.concurrent.Future

方法详细资料

isSuccess

isCancellable

cause

addListener

addListeners

removeListener

removeListeners

sync

syncUninterruptibly

await

awaitUninterruptibly

await

await

awaitUninterruptibly

awaitUninterruptibly

getNow

cancel