NoWriter.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
package org.apache.commons.jcs3.jcache;

import java.util.Collection;

import javax.cache.Cache;
import javax.cache.integration.CacheWriter;
import javax.cache.integration.CacheWriterException;

public class NoWriter<K, V> implements CacheWriter<K, V>
{
    public static final NoWriter<?, ?> INSTANCE = new NoWriter<>();

    @Override
    public void write(final Cache.Entry<? extends K, ? extends V> entry) throws CacheWriterException
    {
        // no-op
    }

    @Override
    public void delete(final Object key) throws CacheWriterException
    {
        // no-op
    }

    @Override
    public void writeAll(final Collection<Cache.Entry<? extends K, ? extends V>> entries) throws CacheWriterException
    {
        entries.forEach(this::write);
    }

    @Override
    public void deleteAll(final Collection<?> keys) throws CacheWriterException
    {
        keys.forEach(this::delete);
    }
}