001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.commons.jcs3.jcache;
020
021import java.util.Collection;
022
023import javax.cache.Cache;
024import javax.cache.integration.CacheWriter;
025import javax.cache.integration.CacheWriterException;
026
027public class NoWriter<K, V> implements CacheWriter<K, V>
028{
029    public static final NoWriter<?, ?> INSTANCE = new NoWriter<>();
030
031    @Override
032    public void write(final Cache.Entry<? extends K, ? extends V> entry) throws CacheWriterException
033    {
034        // no-op
035    }
036
037    @Override
038    public void delete(final Object key) throws CacheWriterException
039    {
040        // no-op
041    }
042
043    @Override
044    public void writeAll(final Collection<Cache.Entry<? extends K, ? extends V>> entries) throws CacheWriterException
045    {
046        entries.forEach(this::write);
047    }
048
049    @Override
050    public void deleteAll(final Collection<?> keys) throws CacheWriterException
051    {
052        keys.forEach(this::delete);
053    }
054}