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.jcs.jcache;
20
21 import javax.cache.Cache;
22 import javax.cache.integration.CacheWriter;
23 import javax.cache.integration.CacheWriterException;
24 import java.util.Collection;
25
26 public class NoWriter<K, V> implements CacheWriter<K, V>
27 {
28 public static final NoWriter INSTANCE = new NoWriter();
29
30 @Override
31 public void write(final Cache.Entry<? extends K, ? extends V> entry) throws CacheWriterException
32 {
33 // no-op
34 }
35
36 @Override
37 public void delete(final Object key) throws CacheWriterException
38 {
39 // no-op
40 }
41
42 @Override
43 public void writeAll(final Collection<Cache.Entry<? extends K, ? extends V>> entries) throws CacheWriterException
44 {
45 for (final Cache.Entry<? extends K, ? extends V> entry : entries)
46 {
47 write(entry);
48 }
49 }
50
51 @Override
52 public void deleteAll(final Collection<?> keys) throws CacheWriterException
53 {
54 for (final Object k : keys)
55 {
56 delete(k);
57 }
58 }
59 }