package org.apache.cassandra.db.migration;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.config.ColumnDefinition;
import org.apache.cassandra.config.ConfigurationException;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.config.KSMetaData;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.SystemTable;
import org.apache.cassandra.db.Table;
import org.apache.cassandra.thrift.CfDef;
import org.apache.cassandra.utils.FBUtilities;
import org.apache.cassandra.utils.UUIDGen;
/**
* 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
* <p/>
* http://www.apache.org/licenses/LICENSE-2.0
* <p/>
* 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.
*/
/** todo: doesn't work with secondary indices yet. See CASSANDRA-1415. */
public class UpdateColumnFamily extends Migration
{
// does not point to a CFM stored in DatabaseDescriptor.
private CFMetaData metadata;
protected UpdateColumnFamily() { }
/** assumes validation has already happened. That is, replacing oldCfm with newCfm is neither illegal or totally whackass. */
public UpdateColumnFamily(org.apache.cassandra.avro.CfDef cf_def) throws ConfigurationException, IOException
{
super(UUIDGen.makeType1UUIDFromHost(FBUtilities.getLocalAddress()), DatabaseDescriptor.getDefsVersion());
KSMetaData ksm = DatabaseDescriptor.getTableDefinition(cf_def.keyspace.toString());
if (ksm == null)
throw new ConfigurationException("Keyspace does not already exist.");
CFMetaData oldCfm = DatabaseDescriptor.getCFMetaData(CFMetaData.getId(cf_def.keyspace.toString(), cf_def.name.toString()));
// create a copy of the old CF meta data. Apply new settings on top of it.
this.metadata = CFMetaData.inflate(oldCfm.deflate());
this.metadata.apply(cf_def);
// create a copy of the old KS meta data. Use it to create a RowMutation that gets applied to schema and migrations.
KSMetaData newKsMeta = KSMetaData.inflate(ksm.deflate());
newKsMeta.cfMetaData().get(cf_def.name.toString()).apply(cf_def);
rm = Migration.makeDefinitionMutation(newKsMeta, null, newVersion);
}
public void beforeApplyModels()
{
if (clientMode)
return;
ColumnFamilyStore cfs = Table.open(metadata.tableName).getColumnFamilyStore(metadata.cfName);
cfs.snapshot(Table.getTimestampedSnapshotName(null));
}
void applyModels() throws IOException
{
logger.debug("Updating " + DatabaseDescriptor.getCFMetaData(metadata.cfId) + " to " + metadata);
// apply the meta update.
try
{
DatabaseDescriptor.getCFMetaData(metadata.cfId).apply(CFMetaData.convertToAvro(metadata));
}
catch (ConfigurationException ex)
{
throw new IOException(ex);
}
DatabaseDescriptor.setTableDefinition(null, newVersion);
if (!clientMode)
{
Table table = Table.open(metadata.tableName);
ColumnFamilyStore oldCfs = table.getColumnFamilyStore(metadata.cfName);
oldCfs.reload();
}
}
public void subdeflate(org.apache.cassandra.db.migration.avro.Migration mi)
{
org.apache.cassandra.db.migration.avro.UpdateColumnFamily update = new org.apache.cassandra.db.migration.avro.UpdateColumnFamily();
update.metadata = metadata.deflate();
mi.migration = update;
}
public void subinflate(org.apache.cassandra.db.migration.avro.Migration mi)
{
org.apache.cassandra.db.migration.avro.UpdateColumnFamily update = (org.apache.cassandra.db.migration.avro.UpdateColumnFamily)mi.migration;
metadata = CFMetaData.inflate(update.metadata);
}
}