/*
* 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.collection;
import com.hazelcast.core.ItemEvent;
import com.hazelcast.core.ItemEventType;
import com.hazelcast.core.ItemListener;
import com.hazelcast.instance.MemberImpl;
import com.hazelcast.logging.ILogger;
import com.hazelcast.partition.InternalPartitionService;
import com.hazelcast.partition.MigrationEndpoint;
import com.hazelcast.partition.strategy.StringPartitioningStrategy;
import com.hazelcast.spi.EventPublishingService;
import com.hazelcast.spi.ManagedService;
import com.hazelcast.spi.MigrationAwareService;
import com.hazelcast.spi.NodeEngine;
import com.hazelcast.spi.Operation;
import com.hazelcast.spi.OperationService;
import com.hazelcast.spi.PartitionMigrationEvent;
import com.hazelcast.spi.PartitionReplicationEvent;
import com.hazelcast.spi.RemoteService;
import com.hazelcast.spi.TransactionalService;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.logging.Level;
public abstract class CollectionService implements ManagedService, RemoteService,
EventPublishingService<CollectionEvent, ItemListener>, TransactionalService, MigrationAwareService {
protected final NodeEngine nodeEngine;
private final ILogger logger;
protected CollectionService(NodeEngine nodeEngine) {
this.nodeEngine = nodeEngine;
this.logger = nodeEngine.getLogger(getClass());
}
@Override
public void init(NodeEngine nodeEngine, Properties properties) {
}
@Override
public void reset() {
getContainerMap().clear();
}
@Override
public void shutdown(boolean terminate) {
reset();
}
@Override
public void destroyDistributedObject(String name) {
getContainerMap().remove(name);
nodeEngine.getEventService().deregisterAllListeners(getServiceName(), name);
}
public abstract CollectionContainer getOrCreateContainer(String name, boolean backup);
public abstract Map<String, ? extends CollectionContainer> getContainerMap();
public abstract String getServiceName();
@Override
public void dispatchEvent(CollectionEvent event, ItemListener listener) {
final MemberImpl member = nodeEngine.getClusterService().getMember(event.caller);
ItemEvent itemEvent = new ItemEvent(event.name, event.eventType, nodeEngine.toObject(event.data),
member);
if (member == null) {
if (logger.isLoggable(Level.INFO)) {
logger.info("Dropping event " + itemEvent + " from unknown address:" + event.caller);
}
return;
}
if (event.eventType.equals(ItemEventType.ADDED)) {
listener.itemAdded(itemEvent);
} else {
listener.itemRemoved(itemEvent);
}
}
@Override
public void rollbackTransaction(String transactionId) {
final Set<String> collectionNames = getContainerMap().keySet();
InternalPartitionService partitionService = nodeEngine.getPartitionService();
OperationService operationService = nodeEngine.getOperationService();
for (String name : collectionNames) {
int partitionId = partitionService.getPartitionId(StringPartitioningStrategy.getPartitionKey(name));
Operation operation = new CollectionTransactionRollbackOperation(name, transactionId)
.setPartitionId(partitionId)
.setService(this)
.setNodeEngine(nodeEngine);
operationService.executeOperation(operation);
}
}
@Override
public void beforeMigration(PartitionMigrationEvent event) {
}
public Map<String, CollectionContainer> getMigrationData(PartitionReplicationEvent event) {
Map<String, CollectionContainer> migrationData = new HashMap<String, CollectionContainer>();
InternalPartitionService partitionService = nodeEngine.getPartitionService();
for (Map.Entry<String, ? extends CollectionContainer> entry : getContainerMap().entrySet()) {
String name = entry.getKey();
int partitionId = partitionService.getPartitionId(StringPartitioningStrategy.getPartitionKey(name));
CollectionContainer container = entry.getValue();
if (partitionId == event.getPartitionId() && container.getConfig().getTotalBackupCount() >= event.getReplicaIndex()) {
migrationData.put(name, container);
}
}
return migrationData;
}
@Override
public void commitMigration(PartitionMigrationEvent event) {
if (event.getMigrationEndpoint() == MigrationEndpoint.SOURCE) {
clearMigrationData(event.getPartitionId());
}
}
@Override
public void rollbackMigration(PartitionMigrationEvent event) {
if (event.getMigrationEndpoint() == MigrationEndpoint.DESTINATION) {
clearMigrationData(event.getPartitionId());
}
}
@Override
public void clearPartitionReplica(int partitionId) {
clearMigrationData(partitionId);
}
private void clearMigrationData(int partitionId) {
final Set<? extends Map.Entry<String, ? extends CollectionContainer>> entrySet = getContainerMap().entrySet();
final Iterator<? extends Map.Entry<String, ? extends CollectionContainer>> iterator = entrySet.iterator();
InternalPartitionService partitionService = nodeEngine.getPartitionService();
while (iterator.hasNext()) {
final Map.Entry<String, ? extends CollectionContainer> entry = iterator.next();
final String name = entry.getKey();
final CollectionContainer container = entry.getValue();
int containerPartitionId = partitionService.getPartitionId(StringPartitioningStrategy.getPartitionKey(name));
if (containerPartitionId == partitionId) {
container.destroy();
iterator.remove();
}
}
}
public void addContainer(String name, CollectionContainer container) {
final Map map = getContainerMap();
map.put(name, container);
}
}