/**
* 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.chaos.actions;
import java.util.Collection;
import java.util.List;
import org.apache.commons.lang.math.RandomUtils;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.util.Bytes;
/**
* Action that tries to move every region of a table.
*/
public class MoveRegionsOfTableAction extends Action {
private final long sleepTime;
private final byte[] tableNameBytes;
private final String tableName;
public MoveRegionsOfTableAction(String tableName) {
this(-1, tableName);
}
public MoveRegionsOfTableAction(long sleepTime, String tableName) {
this.sleepTime = sleepTime;
this.tableNameBytes = Bytes.toBytes(tableName);
this.tableName = tableName;
}
@Override
public void perform() throws Exception {
HBaseAdmin admin = this.context.getHaseIntegrationTestingUtility().getHBaseAdmin();
List<HRegionInfo> regions = admin.getTableRegions(tableNameBytes);
Collection<ServerName> serversList = admin.getClusterStatus().getServers();
ServerName[] servers = serversList.toArray(new ServerName[serversList.size()]);
LOG.info("Performing action: Move regions of table " + tableName);
for (HRegionInfo regionInfo:regions) {
try {
String destServerName =
servers[RandomUtils.nextInt(servers.length)].getServerName();
LOG.debug("Moving " + regionInfo.getRegionNameAsString() + " to " + destServerName);
admin.move(regionInfo.getRegionName(), Bytes.toBytes(destServerName));
} catch (Exception e) {
LOG.debug("Error moving region", e);
}
}
if (sleepTime > 0) {
Thread.sleep(sleepTime);
}
}
}