Package org.pipecraft.infra.concurrent

Class ImmediateFuture<V,E extends Exception>

java.lang.Object

org.pipecraft.infra.concurrent.AbstractCheckedFuture<V,E>

org.pipecraft.infra.concurrent.ImmediateFuture<V,E>

Type Parameters:

V - The future's value data type

All Implemented Interfaces:

com.google.common.util.concurrent.ListenableFuture<V>, Future<V>, CheckedFuture<V,E>

public class ImmediateFuture<V,E extends Exception>
extends AbstractCheckedFuture<V,E>

A checked listenable future that returns a predefined value or throws a predifined exception.

Author:

Eyal Schneider

Method Summary

Modifier and Type	Method	Description
protected E	map(Exception e)	Maps a checked exception originating from the underlying computation into the standard exception type E.
static <V,E extends Exception> CheckedFuture<V,E>	ofError(E exception)
static <V,E extends Exception> CheckedFuture<V,E>	ofValue(V value)

Methods inherited from class org.pipecraft.infra.concurrent.AbstractCheckedFuture

addListener, cancel, checkedGet, checkedGet, get, get, isCancelled, isDone

Methods inherited from class java.lang.Object

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

Method Detail

map

protected E map(Exception e)

Description copied from class: AbstractCheckedFuture

Maps a checked exception originating from the underlying computation into the standard exception type E. In most cases when e is of type RuntimeException, it's recommended to simply throw it here, to avoid hiding a severe error or presenting it as a legitimate error.

Specified by:

map in class AbstractCheckedFuture<V,E extends Exception>

Parameters:

e - The original exception

Returns:

The mapped exception of type E

ofValue

public static <V,E extends Exception> CheckedFuture<V,E> ofValue(V value)

Parameters:

value - A value to be returned by the future

Returns:

The listenable checked future programmed with the given value

ofError

public static <V,E extends Exception> CheckedFuture<V,E> ofError(E exception)

Parameters:

exception - The exception to throw

Returns:

The listenable checked future programmed with the given exception