com.liferay.portal.kernel.concurrent.NoticeableFutureConverter Maven / Gradle / Ivy

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Contains interfaces for the portal services. Interfaces are only loaded by the global class loader and are shared by all plugins.

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.concurrent;

import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 * @author Shuyang Zhou
 */
public abstract class NoticeableFutureConverter
	extends FutureConverter implements NoticeableFuture {

	public NoticeableFutureConverter(NoticeableFuture noticeableFuture) {
		super(noticeableFuture);

		_defaultNoticeableFuture = new DefaultNoticeableFuture<>();

		noticeableFuture.addFutureListener(
			new FutureListener() {

				@Override
				public void complete(Future future) {
					if (future.isCancelled()) {
						_defaultNoticeableFuture.cancel(true);

						return;
					}

					try {
						_defaultNoticeableFuture.set(convert(future.get()));
					}
					catch (Throwable throwable) {
						if (throwable instanceof ExecutionException) {
							throwable = throwable.getCause();
						}

						_defaultNoticeableFuture.setException(throwable);
					}
				}

			});
	}

	@Override
	public boolean addFutureListener(FutureListener futureListener) {
		return _defaultNoticeableFuture.addFutureListener(futureListener);
	}

	@Override
	public T get() throws ExecutionException, InterruptedException {
		return _defaultNoticeableFuture.get();
	}

	@Override
	public T get(long timeout, TimeUnit timeUnit)
		throws ExecutionException, InterruptedException, TimeoutException {

		return _defaultNoticeableFuture.get(timeout, timeUnit);
	}

	@Override
	public boolean removeFutureListener(FutureListener futureListener) {
		return _defaultNoticeableFuture.removeFutureListener(futureListener);
	}

	private final DefaultNoticeableFuture _defaultNoticeableFuture;

}