/**
* 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 com.alibaba.wasp.master.handler;
import com.alibaba.wasp.EntityGroupInfo;
import com.alibaba.wasp.Server;
import com.alibaba.wasp.TableLockedException;
import com.alibaba.wasp.master.FMasterServices;
import com.alibaba.wasp.master.TableLockManager;
import com.alibaba.wasp.meta.FMetaEditor;
import com.alibaba.wasp.meta.FMetaReader;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.zookeeper.KeeperException;
import java.io.IOException;
import java.util.List;
/**
* Handler to delete a index.
*/
public class DeleteIndexHandler extends TableEventHandler {
private static final Log LOG = LogFactory.getLog(DeleteIndexHandler.class);
private String indexName;
private TableLockManager tableLockManager;
/**
* @param tableName
* @param server
* @param fMasterServices
* @param eventType
* @throws java.io.IOException
*/
public DeleteIndexHandler(byte[] tableName, String indexName, Server server,
FMasterServices fMasterServices, EventType eventType) throws IOException {
super(tableName, server, fMasterServices, eventType);
this.tableLockManager = fMasterServices.getTableLockManager();
if (tableLockManager.lockTable(tableNameStr)) {
LOG.info("lock table '" + tableNameStr + "' by DeleteIndexHandler");
} else {
throw new TableLockedException(tableNameStr + " has been locked. ");
}
this.indexName = indexName;
}
/**
* @see com.alibaba.wasp.master.handler.TableEventHandler#handleTableOperation(java.util.List)
*/
@Override
protected void handleTableOperation(List<EntityGroupInfo> entityGroups)
throws IOException, KeeperException {
String strTableName = Bytes.toString(tableName);
try {
FMetaEditor.deleteIndex(server.getConfiguration(), strTableName,
FMetaReader.getIndex(server.getConfiguration(), strTableName,
indexName));
} finally {
tableLockManager.unlockTable(tableNameStr);
}
}
}