/*
* 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.lucene.util;
import java.util.Collection;
import java.util.Collections;
/**
* An object whose RAM usage can be computed.
*
* @lucene.internal
*/
public interface Accountable {
/**
* Return the memory usage of this object in bytes. Negative values are illegal.
*/
long ramBytesUsed();
/**
* Returns nested resources of this class.
* The result should be a point-in-time snapshot (to avoid race conditions).
* @see Accountables
*/
default Collection<Accountable> getChildResources() {
return Collections.emptyList();
}
}