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.commons.jcs3.jcache;
20
21 import java.util.Collection;
22
23 import javax.cache.Cache;
24 import javax.cache.integration.CacheWriter;
25 import javax.cache.integration.CacheWriterException;
26
27 public class NoWriter<K, V> implements CacheWriter<K, V>
28 {
29 public static final NoWriter<?, ?> INSTANCE = new NoWriter<>();
30
31 @Override
32 public void write(final Cache.Entry<? extends K, ? extends V> entry) throws CacheWriterException
33 {
34 // no-op
35 }
36
37 @Override
38 public void delete(final Object key) throws CacheWriterException
39 {
40 // no-op
41 }
42
43 @Override
44 public void writeAll(final Collection<Cache.Entry<? extends K, ? extends V>> entries) throws CacheWriterException
45 {
46 entries.forEach(this::write);
47 }
48
49 @Override
50 public void deleteAll(final Collection<?> keys) throws CacheWriterException
51 {
52 keys.forEach(this::delete);
53 }
54 }