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/*
* 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.hadoop.hbase.rsgroup;
import java.io.IOException;
import java.util.Optional;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.TableDescriptor;
import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;
import org.apache.hadoop.hbase.master.procedure.ModifyTableDescriptorProcedure;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Procedure for migrating rs group information to table descriptor.
*/
@InterfaceAudience.Private
public class MigrateRSGroupProcedure extends ModifyTableDescriptorProcedure {
private static final Logger LOG = LoggerFactory.getLogger(MigrateRSGroupProcedure.class);
public MigrateRSGroupProcedure() {
}
public MigrateRSGroupProcedure(MasterProcedureEnv env, TableName tableName) {
super(env, tableName);
}
@Override
protected Optional modify(MasterProcedureEnv env, TableDescriptor current)
throws IOException {
if (current.getRegionServerGroup().isPresent()) {
// usually this means user has set the rs group using the new code which will set the group
// directly on table descriptor, skip.
LOG.debug("Skip migrating {} since it is already in group {}", current.getTableName(),
current.getRegionServerGroup().get());
return Optional.empty();
}
RSGroupInfo group =
env.getMasterServices().getRSGroupInfoManager().getRSGroupForTable(current.getTableName());
if (group == null) {
LOG.debug("RSGroup for table {} is empty when migrating, usually this should not happen"
+ " unless we have removed the RSGroup, ignore...", current.getTableName());
return Optional.empty();
}
return Optional
.of(TableDescriptorBuilder.newBuilder(current).setRegionServerGroup(group.getName()).build());
}
}