/*
* 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.partition.operation;
import com.hazelcast.core.MigrationEvent;
import com.hazelcast.internal.partition.MigrationInfo;
import com.hazelcast.internal.partition.impl.InternalPartitionServiceImpl;
import com.hazelcast.internal.partition.impl.PartitionStateManager;
import com.hazelcast.logging.ILogger;
import com.hazelcast.spi.MigrationAwareService;
import com.hazelcast.spi.PartitionMigrationEvent;
import static com.hazelcast.core.MigrationEvent.MigrationStatus.STARTED;
/**
* Runs locally when the node becomes owner of a partition, before applying a promotion result to the partition table.
* Sends a {@link MigrationEvent} and notifies all {@link MigrationAwareService}s that the migration is starting.
* After completion notifies the {@link #beforePromotionsCallback}.
*/
final class BeforePromotionOperation extends AbstractPromotionOperation {
private Runnable beforePromotionsCallback;
/**
* This constructor should not be used to obtain an instance of this class; it exists to fulfill IdentifiedDataSerializable
* coding conventions.
*/
public BeforePromotionOperation() {
super(null);
}
BeforePromotionOperation(MigrationInfo migrationInfo, Runnable beforePromotionsCallback) {
super(migrationInfo);
this.beforePromotionsCallback = beforePromotionsCallback;
}
@Override
public void beforeRun() throws Exception {
sendMigrationEvent(STARTED);
InternalPartitionServiceImpl service = getService();
PartitionStateManager partitionStateManager = service.getPartitionStateManager();
partitionStateManager.setMigratingFlag(getPartitionId());
}
@Override
public void run() throws Exception {
ILogger logger = getLogger();
if (logger.isFinestEnabled()) {
logger.finest("Running before promotion for " + getPartitionMigrationEvent());
}
PartitionMigrationEvent event = getPartitionMigrationEvent();
for (MigrationAwareService service : getMigrationAwareServices()) {
try {
service.beforeMigration(event);
} catch (Throwable e) {
logger.warning("While promoting " + getPartitionMigrationEvent(), e);
}
}
}
@Override
public void afterRun() throws Exception {
if (beforePromotionsCallback != null) {
beforePromotionsCallback.run();
}
}
}