/*
* Copyright (c) 2008-2017, 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.record;
import com.hazelcast.nio.serialization.Data;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
import static com.hazelcast.util.JVMUtil.REFERENCE_COST_IN_BYTES;
/**
* CachedDataRecordWithStats.
*/
class CachedDataRecordWithStats extends DataRecordWithStats {
private static final AtomicReferenceFieldUpdater<CachedDataRecordWithStats, Object> CACHED_VALUE =
AtomicReferenceFieldUpdater.newUpdater(CachedDataRecordWithStats.class, Object.class, "cachedValue");
private static final int CACHED_VALUE_REF_COST_IN_BYTES = REFERENCE_COST_IN_BYTES;
private transient volatile Object cachedValue;
CachedDataRecordWithStats() {
super();
}
CachedDataRecordWithStats(Data value) {
super(value);
}
@Override
public void setValue(Data o) {
super.setValue(o);
cachedValue = null;
}
@Override
public Object getCachedValueUnsafe() {
return cachedValue;
}
@Override
public boolean casCachedValue(Object expectedValue, Object newValue) {
return CACHED_VALUE.compareAndSet(this, expectedValue, newValue);
}
@Override
public long getCost() {
return super.getCost() + CACHED_VALUE_REF_COST_IN_BYTES;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
if (!super.equals(o)) {
return false;
}
CachedDataRecordWithStats that = (CachedDataRecordWithStats) o;
return cachedValue != null ? cachedValue.equals(that.cachedValue) : that.cachedValue == null;
}
@Override
public int hashCode() {
int result = super.hashCode();
result = 31 * result + (cachedValue != null ? cachedValue.hashCode() : 0);
return result;
}
}