1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Copyright (C) 2017 Amdocs
* =============================================================================
* 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.
*
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
* ============LICENSE_END=========================================================
*/
package org.openecomp.appc.cache.impl;
import java.util.LinkedHashMap;
import java.util.Map;
import org.openecomp.appc.cache.CacheStrategy;
/**
* LRU cache implements CacheStategy<K, V>
* @param <K> Key
* @param <V> Value
*/
public class LRUCache<K,V> implements CacheStrategy<K,V> {
private Map<K,V> map;
LRUCache(final Integer capacity){
map = new LinkedHashMap<K,V>(capacity, 0.75F, true) {
@Override
protected boolean removeEldestEntry(Map.Entry<K, V> eldest){
return size() > capacity;
}
};
}
@Override
public V getObject(K key) {
return map.get(key);
}
@Override
public void putObject(K key, V value) {
map.put(key,value);
}
}
|
