Package co.paralleluniverse.fibers.futures

Class AsyncCompletionStage<V>

java.lang.Object

co.paralleluniverse.fibers.FiberAsync<V,java.util.concurrent.ExecutionException>

co.paralleluniverse.fibers.futures.AsyncCompletionStage<V>

All Implemented Interfaces:

java.io.Serializable

public class AsyncCompletionStage<V>
extends FiberAsync<V,java.util.concurrent.ExecutionException>

Turns CompletableFutures into fiber-blocking operations.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method	Description
static <V> V	get(java.util.concurrent.CompletionStage<V> future)	Blocks the current strand (either fiber or thread) until the given future completes, and returns its result.
static <V> V	get(java.util.concurrent.CompletionStage<V> future, long timeout, java.util.concurrent.TimeUnit unit)	Blocks the current strand (either fiber or thread) until the given future completes - but no longer than the given timeout - and returns its result.
static <V> V	get(java.util.concurrent.CompletionStage<V> future, Timeout timeout)	Blocks the current strand (either fiber or thread) until the given future completes - but no longer than the given timeout - and returns its result.
protected void	requestAsync()	A user of this class must override this method to start the asynchronous operation and register the callback.
protected V	requestSync()	Called if FiberAsync.run() is not being executed in a fiber.
protected java.util.concurrent.ExecutionException	wrapException(java.lang.Throwable t)	Takes the exception generated by the async operation and possibly wraps it in an exception that will be thrown by the run method.

Methods inherited from class co.paralleluniverse.fibers.FiberAsync

asyncCompleted, asyncFailed, getResult, interrupted, isCompleted, prepark, requestSync, run, run, run, runBlocking, runBlocking, runBlocking, waitForRegistration

Methods inherited from class java.lang.Object

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

Method Detail

get

public static <V> V get(java.util.concurrent.CompletionStage<V> future)
                 throws java.util.concurrent.ExecutionException,
                        java.lang.InterruptedException,
                        SuspendExecution

Blocks the current strand (either fiber or thread) until the given future completes, and returns its result.

Parameters:

future - the future

Returns:

the future's result

Throws:

java.util.concurrent.ExecutionException - if the future's computation threw an exception

java.lang.InterruptedException - if the current thread was interrupted while waiting

SuspendExecution

get

public static <V> V get(java.util.concurrent.CompletionStage<V> future,
                        long timeout,
                        java.util.concurrent.TimeUnit unit)
                 throws java.util.concurrent.ExecutionException,
                        java.lang.InterruptedException,
                        SuspendExecution,
                        java.util.concurrent.TimeoutException

Blocks the current strand (either fiber or thread) until the given future completes - but no longer than the given timeout - and returns its result.

Parameters:

future - the future

timeout - the maximum duration to wait for the future's result

unit - the timeout's time unit

Returns:

the future's result

Throws:

java.util.concurrent.ExecutionException - if the future's computation threw an exception

java.util.concurrent.TimeoutException - if the timeout expired before the future completed

java.lang.InterruptedException - if the current thread was interrupted while waiting

SuspendExecution

get

public static <V> V get(java.util.concurrent.CompletionStage<V> future,
                        Timeout timeout)
                 throws java.util.concurrent.ExecutionException,
                        java.lang.InterruptedException,
                        SuspendExecution,
                        java.util.concurrent.TimeoutException

Blocks the current strand (either fiber or thread) until the given future completes - but no longer than the given timeout - and returns its result.

Parameters:

future - the future

timeout - the method will not block for longer than the amount remaining in the Timeout

Returns:

the future's result

Throws:

java.util.concurrent.ExecutionException - if the future's computation threw an exception

java.util.concurrent.TimeoutException - if the timeout expired before the future completed

java.lang.InterruptedException - if the current thread was interrupted while waiting

SuspendExecution

requestAsync

protected void requestAsync()

Description copied from class: FiberAsync

A user of this class must override this method to start the asynchronous operation and register the callback. This method may not use any ThreadLocals.

Specified by:

requestAsync in class FiberAsync<V,java.util.concurrent.ExecutionException>

wrapException

protected java.util.concurrent.ExecutionException wrapException(java.lang.Throwable t)

Description copied from class: FiberAsync

Takes the exception generated by the async operation and possibly wraps it in an exception that will be thrown by the run method.

Overrides:

wrapException in class FiberAsync<V,java.util.concurrent.ExecutionException>

requestSync

protected V requestSync()
                 throws java.lang.InterruptedException,
                        java.util.concurrent.ExecutionException

Description copied from class: FiberAsync

Called if FiberAsync.run() is not being executed in a fiber. Should perform the operation synchronously and return its result. The default implementation of this method throws an `IllegalThreadStateException`.

Overrides:

requestSync in class FiberAsync<V,java.util.concurrent.ExecutionException>

Returns:

The operation's result.

Throws:

java.lang.InterruptedException

java.util.concurrent.ExecutionException