1 /*
2 * MIT License
3 *
4 * Copyright (c) 2010-2022 The Waffle Project Contributors: https://github.com/Waffle/waffle/graphs/contributors
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24 package waffle.util.cache;
25
26 import com.github.benmanes.caffeine.cache.Caffeine;
27
28 import java.time.Duration;
29
30 import org.checkerframework.checker.index.qual.NonNegative;
31
32 /**
33 * A {@link Cache} based on {@link com.github.benmanes.caffeine.cache.Cache}
34 *
35 * @param <K>
36 * the type of keys maintained by this cache
37 * @param <V>
38 * the type of mapped values
39 *
40 * @author Simon Legner
41 */
42 public class CaffeineCache<K, V> implements Cache<K, V> {
43
44 /** The cache store. */
45 private final com.github.benmanes.caffeine.cache.Cache<K, V> cache;
46
47 /**
48 * Instantiate new caffeine cache with timeout.
49 *
50 * @param timeout
51 * Specified timeout in seconds for cache.
52 */
53 public CaffeineCache(@NonNegative final long timeout) {
54 cache = Caffeine.newBuilder().expireAfterWrite(Duration.ofSeconds(timeout)).build();
55 }
56
57 @Override
58 public V get(K key) {
59 return cache.asMap().get(key);
60 }
61
62 @Override
63 public void put(K key, V value) {
64 cache.put(key, value);
65 }
66
67 @Override
68 public void remove(K key) {
69 cache.asMap().remove(key);
70 }
71
72 @Override
73 public int size() {
74 return cache.asMap().size();
75 }
76 }