/*
* Copyright (C) 2012 Facebook, Inc.
*
* 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 com.facebook.concurrency;
/**
* This is very similar to a factory, but the apply() function implementations
* usually create a Callable which is then executed. The resuting value, or
* exception, is then stored in the CallableSnapshot
*
* @param <I> type of the input to pass to underlying implementation. Used in
* creating the Callable
* @param <O> output of the implementation's Callable
* @param <E> exception type that may be thrown by the Callable
*/
public interface CallableSnapshotFunction<I, O, E extends Exception> {
CallableSnapshot<O, E> apply(I input);
}