/*
* 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 java.util.concurrent.atomic.
AtomicLong;
/**
* Size estimator for near cache.
*/
class
NearCacheSizeEstimator implements
SizeEstimator<
NearCache.
CacheRecord> {
private final
AtomicLong size = new
AtomicLong(0L);
protected
NearCacheSizeEstimator() {
super();
}
@
Override
public long
getCost(
NearCache.
CacheRecord record) {
// immediate check nothing to do if record is null
if (
record == null) {
return 0;
}
final long
cost =
record.
getCost();
// if cost is zero, type of cached object is not Data.
// then omit.
if (
cost == 0) {
return 0;
}
final int
numberOfIntegers = 4;
long
size = 0;
// entry size in CHM
size +=
numberOfIntegers * ((
Integer.
SIZE /
Byte.
SIZE));
size +=
cost;
return
size;
}
@
Override
public long
getSize() {
return
size.
longValue();
}
public void
add(long
size) {
this.
size.
addAndGet(
size);
}
public void
reset() {
size.
set(0L);
}
}