org.apache.flink.runtime.util.LRUCacheMap Maven / Gradle / Ivy
/*
* 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.flink.runtime.util;
import java.util.LinkedHashMap;
import java.util.Map;
public class LRUCacheMap {
private final LinkedHashMap lruCache = new LinkedHashMap(16, 0.75F, true);
public static LRUCacheMap create() {
return new LRUCacheMap();
}
public void put(K key, V value) {
lruCache.put(key, value);
}
public V get(K key) {
return lruCache.get(key);
}
public V getLRU() {
for (Map.Entry entry : lruCache.entrySet()) {
return lruCache.get(entry.getKey());
}
return null;
}
public V remove(K key) {
return lruCache.remove(key);
}
public V removeLRU() {
for (Map.Entry entry : lruCache.entrySet()) {
return lruCache.remove(entry.getKey());
}
return null;
}
public boolean containsKey(K key) {
return lruCache.containsKey(key);
}
public boolean isEmpty() {
return lruCache.isEmpty();
}
public int size() {
return lruCache.size();
}
}