/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cassandra.utils;
import java.util.ArrayDeque;
import java.util.Iterator;
/**
* not threadsafe. caller is responsible for any locking necessary.
*/
public class BoundedStatsDeque extends AbstractStatsDeque
{
private final int size;
protected final ArrayDeque<Double> deque;
public BoundedStatsDeque(int size)
{
this.size = size;
deque = new ArrayDeque<Double>(size);
}
public Iterator<Double> iterator()
{
return deque.iterator();
}
public int size()
{
return deque.size();
}
public void clear()
{
deque.clear();
}
public void add(double o)
{
if (size == deque.size())
{
deque.remove();
}
deque.add(o);
}
}