/*
* JBoss, Home of Professional Open Source
*
* Copyright 2009 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.xnio;
import java.util.concurrent.
Executor;
import java.io.
IOException;
/**
* A result with a corresponding {@link org.xnio.IoFuture} instance.
*
* @param <T> the {@code IoFuture} result type
*/
public class
FutureResult<T> implements
Result<T> {
private final
AbstractIoFuture<T>
ioFuture;
/**
* Construct a new instance.
*
* @param executor the executor to use to execute listener notifiers.
*/
public
FutureResult(final
Executor executor) {
ioFuture = new
AbstractIoFuture<T>() {
protected
Executor getNotifierExecutor() {
return
executor;
}
};
}
/**
* Construct a new instance. The direct executor will be used to execute handler notifiers.
*/
public
FutureResult() {
this(
IoUtils.
directExecutor());
}
/**
* Get the {@code IoFuture} for this manager.
*
* @return the {@code IoFuture}
*/
public
IoFuture<T>
getIoFuture() {
return
ioFuture;
}
/**
* Add a cancellation handler. The argument will be cancelled whenever the {@code IoFuture} is cancelled. If
* the {@code IoFuture} is already cancelled when this method is called, the handler will be called directly.
*
* @param cancellable the cancel handler
*/
public void
addCancelHandler(final
Cancellable cancellable) {
ioFuture.
addCancelHandler(
cancellable);
}
/**
* Set the result for this operation. Any threads blocking on this instance will be unblocked.
*
* @param result the result to set
* @return {@code false} if the operation was already completed, {@code true} otherwise
*/
public boolean
setResult(final T
result) {
return
ioFuture.
setResult(
result);
}
/**
* Set the exception for this operation. Any threads blocking on this instance will be unblocked.
*
* @param exception the exception to set
* @return {@code false} if the operation was already completed, {@code true} otherwise
*/
public boolean
setException(final
IOException exception) {
return
ioFuture.
setException(
exception);
}
/**
* Acknowledge the cancellation of this operation.
*
* @return {@code false} if the operation was already completed, {@code true} otherwise
*/
public boolean
setCancelled() {
return
ioFuture.
setCancelled();
}
}