managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/EntryCacheEvictionPolicy.java

/**
 * Copyright 2016 Yahoo Inc.
 *
 * 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 org.apache.bookkeeper.mledger.impl;

import java.util.List;

/**
 * Cache eviction policy abstraction interface
 *
 */
public interface EntryCacheEvictionPolicy {
    /**
     * Perform the cache eviction of at least sizeToFree bytes on the supplied list of caches
     *
     * @param caches
     *            the list of caches to consider
     * @param sizeToFree
     *            the minimum size in bytes to be freed
     */
    void doEviction(List<EntryCache> caches, long sizeToFree);
}