/*
 *
 * 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.cassandra.cache;

/**
 * Represents a weighted cache size.
 *
 * The non-auth caches are weighted (they do care about weight of a single entry) whereas the auth caches are
 * unweighted.
 */
public interface CacheSize
{
    /**
     * Returns the maximum total weighted size of this cache.
     */
    long capacity();

    /**
     * Specifies the maximum total weighted size of this cache.
     */
    void setCapacity(long capacity);

    /**
     * Returns the approximate number of entries in this cache.
     */
    int size();

    /**
     * Returns the approximate accumulated weight of entries in this cache.
     */
    long weightedSize();
}
