package org.apache.cassandra.cache;
/*
*
* 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.
*
*/
public interface IMeasurableMemory
{
/**
* @return the amount of on-heap memory retained by the object that might be reclaimed if the object were reclaimed,
* i.e. it should try to exclude globally cached data where possible, or counting portions of arrays that are
* referenced by the object but used by other objects only (e.g. slabbed byte-buffers), etc.
*/
public long unsharedHeapSize();
}