com.hazelcast.map.MapSizeEstimator Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.map;
import com.hazelcast.map.record.Record;
/**
* Size estimator for map.
* @param : An instance of {@link com.hazelcast.map.record.Record}.
*/
class MapSizeEstimator implements SizeEstimator {
private volatile long size;
public long getSize() {
return size;
}
public void add(long size) {
this.size += size;
}
public void reset() {
size = 0;
}
public long getCost(T record) {
if (record == null) {
return 0L;
}
final long cost = record.getCost();
if (cost == 0L) {
return cost;
}
final int numberOfIntegers = 4;
// entry size in CHM
long refSize = numberOfIntegers * ((Integer.SIZE / Byte.SIZE));
return refSize + cost;
}
}