/*
* 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.config.MapConfig;
import com.hazelcast.map.impl.MapContainer;
import com.hazelcast.map.impl.MapDataSerializerHook;
import com.hazelcast.map.impl.MapServiceContext;
import com.hazelcast.map.impl.PartitionContainer;
import com.hazelcast.map.impl.record.Record;
import com.hazelcast.map.impl.record.RecordReplicationInfo;
import com.hazelcast.map.impl.recordstore.RecordStore;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.util.Clock;
import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import static com.hazelcast.map.impl.record.Records.applyRecordInfo;
/**
* Holder for raw IMap key-value pairs and their metadata.
*/
// keep this `protected`, extended in another context.
public class MapReplicationStateHolder implements IdentifiedDataSerializable {
protected Map<String, Set<RecordReplicationInfo>> data;
// propagates the information if the given record store has been already loaded with map-loaded
// if so, the loading won't be triggered again after a migration to avoid duplicate loading.
protected Map<String, Boolean> loaded;
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 MapReplicationStateHolder() {
}
public MapReplicationStateHolder(MapReplicationOperation mapReplicationOperation) {
this.mapReplicationOperation = mapReplicationOperation;
}
void prepare(PartitionContainer container, int replicaIndex) {
data = new HashMap<String, Set<RecordReplicationInfo>>(container.getMaps().size());
loaded = new HashMap<String, Boolean>(container.getMaps().size());
for (Map.Entry<String, RecordStore> entry : container.getMaps().entrySet()) {
RecordStore recordStore = entry.getValue();
MapContainer mapContainer = recordStore.getMapContainer();
MapConfig mapConfig = mapContainer.getMapConfig();
if (mapConfig.getTotalBackupCount() < replicaIndex) {
continue;
}
MapServiceContext mapServiceContext = mapContainer.getMapServiceContext();
String mapName = entry.getKey();
loaded.put(mapName, recordStore.isLoaded());
// now prepare data to migrate records
Set<RecordReplicationInfo> recordSet = new HashSet<RecordReplicationInfo>(recordStore.size());
final Iterator<Record> iterator = recordStore.iterator();
while (iterator.hasNext()) {
Record record = iterator.next();
Data key = record.getKey();
RecordReplicationInfo recordReplicationInfo
= mapReplicationOperation.createRecordReplicationInfo(key, record, mapServiceContext);
recordSet.add(recordReplicationInfo);
}
data.put(mapName, recordSet);
}
}
void applyState() {
if (data != null) {
for (Map.Entry<String, Set<RecordReplicationInfo>> dataEntry : data.entrySet()) {
Set<RecordReplicationInfo> recordReplicationInfos = dataEntry.getValue();
final String mapName = dataEntry.getKey();
RecordStore recordStore = mapReplicationOperation.getRecordStore(mapName);
recordStore.reset();
recordStore.setPreMigrationLoadedStatus(loaded.get(mapName));
for (RecordReplicationInfo recordReplicationInfo : recordReplicationInfos) {
Data key = recordReplicationInfo.getKey();
final Data value = recordReplicationInfo.getValue();
Record newRecord = recordStore.createRecord(value, -1L, Clock.currentTimeMillis());
applyRecordInfo(newRecord, recordReplicationInfo);
recordStore.putRecord(key, newRecord);
}
}
}
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
out.writeInt(data.size());
for (Map.Entry<String, Set<RecordReplicationInfo>> dataEntry : data.entrySet()) {
out.writeUTF(dataEntry.getKey());
Set<RecordReplicationInfo> recordReplicationInfos = dataEntry.getValue();
out.writeInt(recordReplicationInfos.size());
for (RecordReplicationInfo recordReplicationInfo : recordReplicationInfos) {
out.writeObject(recordReplicationInfo);
}
}
out.writeInt(loaded.size());
for (Map.Entry<String, Boolean> loadedEntry : loaded.entrySet()) {
out.writeUTF(loadedEntry.getKey());
out.writeBoolean(loadedEntry.getValue());
}
}
@Override
public void readData(ObjectDataInput in) throws IOException {
int size = in.readInt();
data = new HashMap<String, Set<RecordReplicationInfo>>(size);
for (int i = 0; i < size; i++) {
String name = in.readUTF();
int mapSize = in.readInt();
Set<RecordReplicationInfo> recordReplicationInfos = new HashSet<RecordReplicationInfo>(mapSize);
for (int j = 0; j < mapSize; j++) {
RecordReplicationInfo recordReplicationInfo = in.readObject();
recordReplicationInfos.add(recordReplicationInfo);
}
data.put(name, recordReplicationInfos);
}
int loadedSize = in.readInt();
loaded = new HashMap<String, Boolean>(loadedSize);
for (int i = 0; i < loadedSize; i++) {
loaded.put(in.readUTF(), in.readBoolean());
}
}
@Override
public int getFactoryId() {
return MapDataSerializerHook.F_ID;
}
@Override
public int getId() {
return MapDataSerializerHook.MAP_REPLICATION_STATE_HOLDER;
}
}