/**
* 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.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.Server;
import org.apache.hadoop.hbase.catalog.MetaEditor;
import org.apache.hadoop.hbase.master.AssignmentManager;
import org.apache.hadoop.hbase.master.MasterServices;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.Threads;
import org.apache.zookeeper.KeeperException;
public class DeleteTableHandler extends TableEventHandler {
private static final Log LOG = LogFactory.getLog(DeleteTableHandler.class);
public DeleteTableHandler(byte [] tableName, Server server,
final MasterServices masterServices)
throws IOException {
super(EventType.C_M_DELETE_TABLE, tableName, server, masterServices);
// The next call fails if no such table.
getTableDescriptor();
}
@Override
protected void handleTableOperation(List<HRegionInfo> regions)
throws IOException, KeeperException {
AssignmentManager am = this.masterServices.getAssignmentManager();
long waitTime = server.getConfiguration().
getLong("hbase.master.wait.on.region", 5 * 60 * 1000);
for (HRegionInfo region : regions) {
long done = System.currentTimeMillis() + waitTime;
while (System.currentTimeMillis() < done) {
AssignmentManager.RegionState rs = am.isRegionInTransition(region);
if (rs == null) break;
Threads.sleep(waitingTimeForEvents);
LOG.debug("Waiting on region to clear regions in transition; " + rs);
}
if (am.isRegionInTransition(region) != null) {
throw new IOException("Waited hbase.master.wait.on.region (" +
waitTime + "ms) for region to leave region " +
region.getRegionNameAsString() + " in transitions");
}
LOG.debug("Deleting region " + region.getRegionNameAsString() +
" from META and FS");
// Remove region from META
MetaEditor.deleteRegion(this.server.getCatalogTracker(), region);
// Delete region from FS
this.masterServices.getMasterFileSystem().deleteRegion(region);
}
// Delete table from FS
this.masterServices.getMasterFileSystem().deleteTable(tableName);
// Update table descriptor cache
this.masterServices.getTableDescriptors().remove(Bytes.toString(tableName));
// If entry for this table in zk, and up in AssignmentManager, remove it.
// Call to undisableTable does this. TODO: Make a more formal purge table.
am.getZKTable().setEnabledTable(Bytes.toString(tableName));
}
@Override
public String toString() {
String name = "UnknownServerName";
if(server != null && server.getServerName() != null) {
name = server.getServerName().toString();
}
return getClass().getSimpleName() + "-" + name + "-" + getSeqid() + "-" + tableNameStr;
}
}