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Kuali Utilities

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/**
 * Copyright 2010-2014 The Kuali Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
 *
 * 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.kuali.common.util.base;

import static com.google.common.collect.Lists.newArrayList;
import static java.util.concurrent.Executors.newFixedThreadPool;
import static org.kuali.common.util.base.Exceptions.illegalState;

import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;

public class Callables {

	public static  List submitCallables(List> callables) {
		ExecutorService pool = newFixedThreadPool(callables.size());
		List> futures = newArrayList();
		for (Callable callable : callables) {
			futures.add(pool.submit(callable));
		}
		List elements = newArrayList();
		for (Future future : futures) {
			elements.add(get(future));
		}
		return elements;
	}

	protected static  T get(Future future) {
		try {
			return future.get();
		} catch (InterruptedException e) {
			throw illegalState(e);
		} catch (ExecutionException e) {
			throw illegalState(e);
		}
	}
}