/*
* 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.
ObjectRecord;
import com.hazelcast.map.record.
Record;
/**
* Size estimator for map.
* @param <T> : An instance of {@link com.hazelcast.map.record.Record}.
*/
class
MapSizeEstimator<T extends
Record> implements
SizeEstimator<T> {
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;
}
if (
record instanceof
ObjectRecord) {
return 0L;
}
final int
numberOfIntegers = 4;
// entry size in CHM
long
refSize =
numberOfIntegers * ((
Integer.
SIZE /
Byte.
SIZE));
final long
valueSize =
record.
getCost();
return
refSize +
valueSize;
}
}