/*
* 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.operation;
import com.hazelcast.internal.nearcache.impl.invalidation.Invalidator;
import com.hazelcast.internal.nearcache.impl.invalidation.MetaDataGenerator;
import com.hazelcast.map.impl.MapDataSerializerHook;
import com.hazelcast.map.impl.MapService;
import com.hazelcast.map.impl.MapServiceContext;
import com.hazelcast.map.impl.PartitionContainer;
import com.hazelcast.map.impl.nearcache.MapNearCacheManager;
import com.hazelcast.map.impl.recordstore.RecordStore;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentMap;
import static com.hazelcast.map.impl.MapDataSerializerHook.MAP_NEAR_CACHE_STATE_HOLDER;
import static java.util.Collections.emptyList;
/**
* Holder for Near Cache metadata.
*/
public class MapNearCacheStateHolder implements IdentifiedDataSerializable {
// keep this `protected`, extended in another context
protected UUID partitionUuid;
protected List<Object> mapNameSequencePairs = emptyList();
private MapReplicationOperation mapReplicationOperation;
/**
* This constructor exists solely for instantiation by {@code MapDataSerializerHook}. The object is not ready to use
* unless {@code mapReplicationOperation} is set.
*/
public MapNearCacheStateHolder() {
}
public MapNearCacheStateHolder(MapReplicationOperation mapReplicationOperation) {
this.mapReplicationOperation = mapReplicationOperation;
}
void prepare(PartitionContainer container, int replicaIndex) {
MapService mapService = container.getMapService();
MetaDataGenerator metaData = getPartitionMetaDataGenerator(mapService);
int partitionId = container.getPartitionId();
partitionUuid = metaData.getUuidOrNull(partitionId);
ConcurrentMap<String, RecordStore> maps = container.getMaps();
for (Map.Entry<String, RecordStore> entry : maps.entrySet()) {
if (mapNameSequencePairs == emptyList()) {
mapNameSequencePairs = new ArrayList(container.getMaps().size());
}
String mapName = entry.getKey();
mapNameSequencePairs.add(mapName);
mapNameSequencePairs.add(metaData.currentSequence(mapName, partitionId));
}
}
private MetaDataGenerator getPartitionMetaDataGenerator(MapService mapService) {
MapServiceContext mapServiceContext = mapService.getMapServiceContext();
MapNearCacheManager mapNearCacheManager = mapServiceContext.getMapNearCacheManager();
Invalidator invalidator = mapNearCacheManager.getInvalidator();
return invalidator.getMetaDataGenerator();
}
void applyState() {
MapService mapService = mapReplicationOperation.getService();
MetaDataGenerator metaDataGenerator = getPartitionMetaDataGenerator(mapService);
int partitionId = mapReplicationOperation.getPartitionId();
if (partitionUuid != null) {
metaDataGenerator.setUuid(partitionId, partitionUuid);
}
for (int i = 0; i < mapNameSequencePairs.size(); ) {
String mapName = (String) mapNameSequencePairs.get(i++);
long sequence = (Long) mapNameSequencePairs.get(i++);
metaDataGenerator.setCurrentSequence(mapName, partitionId, sequence);
}
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
boolean nullUuid = partitionUuid == null;
out.writeBoolean(nullUuid);
if (!nullUuid) {
out.writeLong(partitionUuid.getMostSignificantBits());
out.writeLong(partitionUuid.getLeastSignificantBits());
}
out.writeInt(mapNameSequencePairs.size());
for (Object item : mapNameSequencePairs) {
out.writeObject(item);
}
}
@Override
public void readData(ObjectDataInput in) throws IOException {
boolean nullUuid = in.readBoolean();
partitionUuid = nullUuid ? null : new UUID(in.readLong(), in.readLong());
int size = in.readInt();
mapNameSequencePairs = new ArrayList(size);
for (int i = 0; i < size; i++) {
mapNameSequencePairs.add(in.readObject());
}
}
@Override
public int getFactoryId() {
return MapDataSerializerHook.F_ID;
}
@Override
public int getId() {
return MAP_NEAR_CACHE_STATE_HOLDER;
}
}