/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hive.hcatalog.api.repl.exim;
import org.apache.hive.hcatalog.api.HCatNotificationEvent;
import org.apache.hive.hcatalog.api.repl.Command;
import org.apache.hive.hcatalog.api.repl.ReplicationTask;
import org.apache.hive.hcatalog.api.repl.ReplicationUtils;
import org.apache.hive.hcatalog.api.repl.commands.ExportCommand;
import org.apache.hive.hcatalog.api.repl.commands.ImportCommand;
import org.apache.hive.hcatalog.common.HCatConstants;
import org.apache.hive.hcatalog.messaging.AlterTableMessage;
import java.util.Collections;
public class AlterTableReplicationTask extends ReplicationTask {
private final AlterTableMessage alterTableMessage;
public AlterTableReplicationTask(HCatNotificationEvent event) {
super(event);
validateEventType(event, HCatConstants.HCAT_ALTER_TABLE_EVENT);
alterTableMessage = messageFactory.getDeserializer().getAlterTableMessage(event.getMessage());
}
public boolean needsStagingDirs(){
return true;
}
public Iterable<? extends Command> getSrcWhCommands() {
verifyActionable();
final String dbName = alterTableMessage.getDB();
final String tableName = alterTableMessage.getTable();
return Collections.singletonList(new ExportCommand(
dbName,
tableName,
null,
srcStagingDirProvider.getStagingDirectory(
ReplicationUtils.getUniqueKey(
getEvent().getEventId(),
dbName,
tableName,
null)
),
true,
event.getEventId()
));
}
public Iterable<? extends Command> getDstWhCommands() {
verifyActionable();
final String dbName = alterTableMessage.getDB();
final String tableName = alterTableMessage.getTable();
return Collections.singletonList(new ImportCommand(
ReplicationUtils.mapIfMapAvailable(dbName, dbNameMapping),
ReplicationUtils.mapIfMapAvailable(tableName, tableNameMapping),
null,
dstStagingDirProvider.getStagingDirectory(
ReplicationUtils.getUniqueKey(
getEvent().getEventId(),
dbName, // Note - important to retain the same key as the export
tableName,
null)
),
true,
event.getEventId()
));
}
}