/*
* Copyright 2012-2013 Aurelius LLC
* Licensed 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.thinkaurelius.titan.diskstorage.hbase;
import java.io.IOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.TableNotDisabledException;
import org.apache.hadoop.hbase.TableNotFoundException;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.HBaseAdmin;
public class HBaseAdmin1_0 implements AdminMask
{
private static final Logger log = LoggerFactory.getLogger(HBaseAdmin1_0.class);
private final Admin adm;
public HBaseAdmin1_0(HBaseAdmin adm)
{
this.adm = adm;
}
@Override
public void clearTable(String tableString, long timestamp) throws IOException
{
TableName tableName = TableName.valueOf(tableString);
if (!adm.tableExists(tableName)) {
log.debug("Attempted to clear table {} before it exists (noop)", tableString);
return;
}
if (!adm.isTableDisabled(tableName))
adm.disableTable(tableName);
if (!adm.isTableDisabled(tableName))
throw new RuntimeException("Unable to disable table " + tableName);
// This API call appears to both truncate and reenable the table.
log.info("Truncating table {}", tableName);
adm.truncateTable(tableName, true /* preserve splits */);
try {
adm.enableTable(tableName);
} catch (TableNotDisabledException e) {
// This triggers seemingly every time in testing with 1.0.2.
log.debug("Table automatically reenabled by truncation: {}", tableName, e);
}
}
@Override
public HTableDescriptor getTableDescriptor(String tableString) throws TableNotFoundException, IOException
{
return adm.getTableDescriptor(TableName.valueOf(tableString));
}
@Override
public boolean tableExists(String tableString) throws IOException
{
return adm.tableExists(TableName.valueOf(tableString));
}
@Override
public void createTable(HTableDescriptor desc) throws IOException
{
adm.createTable(desc);
}
@Override
public void createTable(HTableDescriptor desc, byte[] startKey, byte[] endKey, int numRegions) throws IOException
{
adm.createTable(desc, startKey, endKey, numRegions);
}
@Override
public int getEstimatedRegionServerCount()
{
int serverCount = -1;
try {
serverCount = adm.getClusterStatus().getServers().size();
log.debug("Read {} servers from HBase ClusterStatus", serverCount);
} catch (IOException e) {
log.debug("Unable to retrieve HBase cluster status", e);
}
return serverCount;
}
@Override
public void disableTable(String tableString) throws IOException
{
adm.disableTable(TableName.valueOf(tableString));
}
@Override
public void enableTable(String tableString) throws IOException
{
adm.enableTable(TableName.valueOf(tableString));
}
@Override
public boolean isTableDisabled(String tableString) throws IOException
{
return adm.isTableDisabled(TableName.valueOf(tableString));
}
@Override
public void addColumn(String tableString, HColumnDescriptor columnDescriptor) throws IOException
{
adm.addColumn(TableName.valueOf(tableString), columnDescriptor);
}
@Override
public void close() throws IOException
{
adm.close();
}
}