/*
* Copyright (C) 2011-2014 Chris Vest (mr.chrisvest@gmail.com)
*
* 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 stormpot;
/**
* Provides a way to compose {@link Expiration}s.
*
* Given two {@link Expiration}s, this class considers that a slot is expired if any of the
* {@link Expiration} returns {@code true}. This makes it easy to have an {@link Expiration} that
* expires both on time ({@link stormpot.TimeExpiration}) and some other criteria.
*
* @author Guillaume Lederrey <guillaume.lederrey@gmail.com>
* @since 2.4
*/
public class CompoundExpiration<T extends Poolable> implements Expiration<T> {
private final Expiration<T> firstExpiration;
private final Expiration<T> secondExpiration;
public CompoundExpiration(Expiration<T> firstExpiration, Expiration<T> secondExpiration) {
this.firstExpiration = firstExpiration;
this.secondExpiration = secondExpiration;
}
/**
* Returns {@code true} if any of the given {@link Expiration} has expired.
*/
@Override
public boolean hasExpired(SlotInfo<? extends T> info) throws Exception {
return firstExpiration.hasExpired(info)
|| secondExpiration.hasExpired(info);
}
}