/**
* 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 storm.trident.util;
import java.util.LinkedHashMap;
import java.util.Map;
public class LRUMap<A, B> extends LinkedHashMap<A, B> {
private int _maxSize;
public LRUMap(int maxSize) {
super(maxSize + 1, 1.0f, true);
_maxSize = maxSize;
}
@Override
protected boolean removeEldestEntry(final Map.Entry<A, B> eldest) {
return size() > _maxSize;
}
}