/*
* 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.internal.nearcache.impl.invalidation;
import com.hazelcast.internal.nearcache.NearCacheRecord;
/**
* Default implementation of {@link StaleReadDetector}
*/
public class StaleReadDetectorImpl implements StaleReadDetector {
private final RepairingHandler repairingHandler;
private final MinimalPartitionService partitionService;
public StaleReadDetectorImpl(RepairingHandler repairingHandler, MinimalPartitionService partitionService) {
this.repairingHandler = repairingHandler;
this.partitionService = partitionService;
}
@Override
public boolean isStaleRead(Object key, NearCacheRecord record) {
MetaDataContainer latestMetaData = repairingHandler.getMetaDataContainer(getPartition(key));
if (!record.hasSameUuid(latestMetaData.getUuid())) {
return true;
}
return record.getInvalidationSequence() < latestMetaData.getStaleSequence();
}
@Override
public MetaDataContainer getMetaDataContainer(Object key) {
return repairingHandler.getMetaDataContainer(getPartition(key));
}
private int getPartition(Object key) {
return partitionService.getPartitionId(key);
}
}