    001/*
    002 * Copyright (c) 2007-2016 Concurrent, Inc. All Rights Reserved.
    003 *
    004 * Project and contact information: http://www.cascading.org/
    005 *
    006 * This file is part of the Cascading project.
    007 *
    008 * Licensed under the Apache License, Version 2.0 (the "License");
    009 * you may not use this file except in compliance with the License.
    010 * You may obtain a copy of the License at
    011 *
    012 *     http://www.apache.org/licenses/LICENSE-2.0
    013 *
    014 * Unless required by applicable law or agreed to in writing, software
    015 * distributed under the License is distributed on an "AS IS" BASIS,
    016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    017 * See the License for the specific language governing permissions and
    018 * limitations under the License.
    019 */
    020
    021package cascading.util.cache;
    022
    023import cascading.flow.FlowProcess;
    024import cascading.provider.CascadingFactory;
    025
    026/**
    027 * Base class for all CacheFactories for creating {@link CascadingCache} instances. Each sub-assembly using
    028 * the {@link CascadingCache} facilities has it's own sub-class of this factory so that different Caches
    029 * can be used for different parts of the same flow.
    030 * <p/>
    031 * A {@link cascading.util.cache.CacheEvictionCallback} can be set and it will be given to each Cache instance created
    032 * by the factory. If none is set, the Factory will use {@link cascading.util.cache.CacheEvictionCallback#NULL}, which
    033 * is a no-op implementation of the {@link cascading.util.cache.CacheEvictionCallback} interface.
    034 */
    035public abstract class BaseCacheFactory<Key, Value, Config> implements CascadingFactory<Config, CascadingCache<Key, Value>>
    036  {
    037  /** default capacity for all caches. */
    038  public static final int DEFAULT_CAPACITY = 10000;
    039
    040  @Override
    041  public void initialize( FlowProcess<? extends Config> flowProcess )
    042    {
    043
    044    }
    045
    046  @Override
    047  public abstract CascadingCache<Key, Value> create( FlowProcess<? extends Config> flowProcess );
    048  }