/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project 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
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.persistence.cache;
import java.io.Serializable;
import java.util.Comparator;
import java.util.List;
import org.smallmind.persistence.Durable;
import org.terracotta.annotations.InstrumentedClass;
@InstrumentedClass
public abstract class DurableVector<I extends Serializable & Comparable<I>, D extends Durable<I>> implements Serializable, Iterable<D> {
private Comparator<D> comparator;
private boolean ordered;
private long creationTimeMilliseconds;
private int timeToLiveSeconds;
private int maxSize;
public DurableVector (Comparator<D> comparator, int maxSize, int timeToLiveSeconds, boolean ordered) {
this.comparator = comparator;
this.maxSize = maxSize;
this.timeToLiveSeconds = timeToLiveSeconds;
this.ordered = ordered;
creationTimeMilliseconds = System.currentTimeMillis();
}
public abstract DurableVector<I, D> copy ();
public abstract boolean isSingular ();
public abstract boolean add (D durable);
public abstract boolean remove (D durable);
public abstract D head ();
public abstract List<D> asBestEffortLazyList ();
public List<D> asBestEffortPreFetchedList () {
return asBestEffortLazyList();
}
public Comparator<D> getComparator () {
return comparator;
}
public int getMaxSize () {
return maxSize;
}
public int getTimeToLiveSeconds () {
return timeToLiveSeconds;
}
public boolean isOrdered () {
return ordered;
}
public boolean isAlive () {
return (timeToLiveSeconds <= 0) || ((System.currentTimeMillis() - creationTimeMilliseconds) / 1000 <= timeToLiveSeconds);
}
}