io.undertow.server.protocol.http.CacheMap Maven / Gradle / Ivy
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* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 io.undertow.server.protocol.http;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* @author Stuart Douglas
*/
public class CacheMap extends LinkedHashMap {
/**
* The load factor used when none specified in constructor.
*/
static final float DEFAULT_LOAD_FACTOR = 0.75f;
private static final long serialVersionUID = 1L;
private int capacity;
public CacheMap(int capacity) {
super(capacity, DEFAULT_LOAD_FACTOR, true);
this.capacity = capacity;
}
/**
* removeEldestEntry() should be overridden by the user, otherwise it will not
* remove the oldest object from the Map.
*/
@Override
protected boolean removeEldestEntry(Map.Entry eldest) {
return size() > this.capacity;
}
}