1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.chemistry.opencmis.client.bindings.cache.impl;
20
21 import java.util.LinkedHashMap;
22 import java.util.Map;
23
24 /**
25 * LRU cache.
26 */
27 public class LruCacheLevelImpl extends AbstractMapCacheLevel {
28
29 private static final long serialVersionUID = 1L;
30
31 public static final String MAX_ENTRIES = "maxEntries";
32
33 @Override
34 public void initialize(Map<String, String> parameters) {
35 final int maxEntries = getIntParameter(parameters, MAX_ENTRIES, 100);
36
37 setMap(new LinkedHashMap<String, Object>(maxEntries + 1, 0.70f, true) {
38 private static final long serialVersionUID = 1L;
39
40 @Override
41 public boolean removeEldestEntry(Map.Entry<String, Object> eldest) {
42 return size() > maxEntries;
43 }
44 });
45 }
46
47 @Override
48 public synchronized Object get(String key) {
49 return super.get(key);
50 }
51 }