/**
* Copyright 2010 The Apache Software Foundation
*
* 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.master.handler;
import java.io.IOException;
import java.util.List;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.InvalidFamilyOperationException;
import org.apache.hadoop.hbase.Server;
import org.apache.hadoop.hbase.catalog.MetaEditor;
import org.apache.hadoop.hbase.master.MasterFileSystem;
import org.apache.hadoop.hbase.master.MasterServices;
import org.apache.hadoop.hbase.util.Bytes;
/**
* Handles adding a new family to an existing table.
*/
public class TableDeleteFamilyHandler extends TableEventHandler {
private final byte [] familyName;
public TableDeleteFamilyHandler(byte[] tableName, byte [] familyName,
Server server, final MasterServices masterServices) throws IOException {
super(EventType.C_M_ADD_FAMILY, tableName, server, masterServices);
this.familyName = familyName;
}
@Override
protected void handleTableOperation(List<HRegionInfo> hris) throws IOException {
HTableDescriptor htd = hris.get(0).getTableDesc();
if(!htd.hasFamily(familyName)) {
throw new InvalidFamilyOperationException(
"Family '" + Bytes.toString(familyName) + "' does not exist so " +
"cannot be deleted");
}
for (HRegionInfo hri : hris) {
// Update the HTD
hri.getTableDesc().removeFamily(familyName);
// Update region in META
MetaEditor.updateRegionInfo(this.server.getCatalogTracker(), hri);
MasterFileSystem mfs = this.masterServices.getMasterFileSystem();
// Update region info in FS
mfs.updateRegionInfo(hri);
// Delete directory in FS
mfs.deleteFamily(hri, familyName);
// Update region info in FS
this.masterServices.getMasterFileSystem().updateRegionInfo(hri);
}
}
}