/**
* 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.HCatClient;
import org.apache.hive.hcatalog.api.HCatNotificationEvent;
import org.apache.hive.hcatalog.api.repl.ErroredReplicationTask;
import org.apache.hive.hcatalog.api.repl.ReplicationTask;
import org.apache.hive.hcatalog.common.HCatConstants;
/**
* EXIMReplicationTaskFactory is an export-import based ReplicationTask.Factory.
*
* It's primary mode of enabling replication is by translating each event it gets
* from the notification subsystem into hive commands that essentially export data
* to be copied over and imported on the other end.
*
* The Commands that Tasks return here are expected to be hive commands.
*/
public class EximReplicationTaskFactory implements ReplicationTask.Factory {
public ReplicationTask create(HCatClient client, HCatNotificationEvent event){
// TODO : Java 1.7+ support using String with switches, but IDEs don't all seem to know that.
// If casing is fine for now. But we should eventually remove this. Also, I didn't want to
// create another enum just for this.
if (event.getEventType().equals(HCatConstants.HCAT_CREATE_DATABASE_EVENT)) {
return new CreateDatabaseReplicationTask(event);
} else if (event.getEventType().equals(HCatConstants.HCAT_DROP_DATABASE_EVENT)) {
return new DropDatabaseReplicationTask(event);
} else if (event.getEventType().equals(HCatConstants.HCAT_CREATE_TABLE_EVENT)) {
return new CreateTableReplicationTask(event);
} else if (event.getEventType().equals(HCatConstants.HCAT_DROP_TABLE_EVENT)) {
return new DropTableReplicationTask(event);
} else if (event.getEventType().equals(HCatConstants.HCAT_ADD_PARTITION_EVENT)) {
return new AddPartitionReplicationTask(event);
} else if (event.getEventType().equals(HCatConstants.HCAT_DROP_PARTITION_EVENT)) {
return new DropPartitionReplicationTask(event);
} else if (event.getEventType().equals(HCatConstants.HCAT_ALTER_TABLE_EVENT)) {
return new AlterTableReplicationTask(event);
} else if (event.getEventType().equals(HCatConstants.HCAT_ALTER_PARTITION_EVENT)) {
return new AlterPartitionReplicationTask(event);
} else if (event.getEventType().equals(HCatConstants.HCAT_INSERT_EVENT)) {
return new InsertReplicationTask(event);
} else {
return new ErroredReplicationTask(event, new IllegalStateException(
"Unrecognized Event type, no replication task available"));
}
}
}