/**
* The MIT License
* Copyright (c) 2014-2016 Ilkka Seppälä
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.iluwatar.async.method.invocation;
import java.util.concurrent.ExecutionException;
/**
* AsyncResult interface
* @param <T> parameter returned when getValue is invoked
*/
public interface AsyncResult<T> {
/**
* Status of the async task execution.
*
* @return <code>true</code> if execution is completed or failed
*/
boolean isCompleted();
/**
* Gets the value of completed async task.
*
* @return evaluated value or throws ExecutionException if execution has failed
* @throws ExecutionException if execution has failed, containing the root cause
* @throws IllegalStateException if execution is not completed
*/
T getValue() throws ExecutionException;
/**
* Blocks the current thread until the async task is completed.
*
* @throws InterruptedException if the execution is interrupted
*/
void await() throws InterruptedException;
}