DisabledCacheWriter.java

/*
 * Copyright 2015 Ben Manes. All Rights Reserved.
 *
 * Licensed 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 com.github.benmanes.caffeine.jcache.integration;

import java.util.Collection;

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

/**
 * A cache writer that does nothing.
 *
 * @author ben.manes@gmail.com (Ben Manes)
 */
public enum DisabledCacheWriter implements CacheWriter<Object, Object> {
  INSTANCE;

  /**
   * Returns a disabled cache writer.
   *
   * @param <K> the type of key
   * @param <V> the type of value
   * @return a cache writer that performs no operation
   */
  @SuppressWarnings("unchecked")
  public static <K, V> CacheWriter<K, V> get() {
    return (CacheWriter<K, V>) INSTANCE;
  }

  @Override
  public void write(Entry<?, ?> entry) {}

  @Override
  public void writeAll(Collection<Entry<?, ?>> entries) {}

  @Override
  public void delete(Object key) {}

  @Override
  public void deleteAll(Collection<?> keys) {}
}