com.hazelcast.map.record.OffHeapRecord 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.record;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.storage.DataRef;
import com.hazelcast.storage.Storage;
class OffHeapRecord extends AbstractRecord {
private Storage storage;
private DataRef valueRef;
OffHeapRecord() {
}
OffHeapRecord(Storage storage, Data key, Data value) {
super(key);
this.storage = storage;
setValue(value);
}
@Override
public long getCost() {
long size = super.getCost();
final int objectReferenceInBytes = 4;
// storage ref
size += objectReferenceInBytes;
// value size
size += objectReferenceInBytes + (valueRef == null ? 0 : valueRef.heapCost());
return size;
}
public Data getValue() {
if (valueRef != null) {
return storage.get(key.getPartitionHash(), valueRef);
}
return null;
}
public void setValue(Data value) {
invalidate();
if (value != null) {
valueRef = storage.put(key.getPartitionHash(), value);
}
}
public void invalidate() {
if (valueRef != null) {
storage.remove(key.getPartitionHash(), valueRef);
}
valueRef = null;
}
}