com.hazelcast.map.impl.BinaryMapSizeEstimator Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, 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.impl;
import com.hazelcast.config.InMemoryFormat;
import com.hazelcast.map.impl.record.Record;
import com.hazelcast.nio.serialization.Data;
/**
* Size estimator for maps which have {@link InMemoryFormat#BINARY} memory-format.
*/
class BinaryMapSizeEstimator implements SizeEstimator {
private volatile long size;
BinaryMapSizeEstimator() {
}
@Override
public long getSize() {
return size;
}
@Override
public void add(long size) {
this.size += size;
}
@Override
public void reset() {
size = 0L;
}
@Override
public long calculateSize(Object object) {
if (object instanceof Data) {
long keyCost = ((Data) object).getHeapCost();
// CHM ref cost of key.
keyCost += REFERENCE_COST_IN_BYTES;
return keyCost;
}
if (object instanceof Record) {
long recordCost = ((Record) object).getCost();
// CHM ref cost of value.
recordCost += REFERENCE_COST_IN_BYTES;
// CHM ref costs of other.
recordCost += REFERENCE_COST_IN_BYTES;
recordCost += REFERENCE_COST_IN_BYTES;
return recordCost;
}
return 0L;
}
}