/*
* 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.cassandra.cql3.statements;
import java.nio.ByteBuffer;
import java.util.List;
import java.util.Map;
import org.apache.cassandra.cql3.CQLStatement;
import org.apache.cassandra.exceptions.InvalidRequestException;
import org.apache.cassandra.transport.messages.ResultMessage;
import org.apache.cassandra.auth.Permission;
import org.apache.cassandra.config.Schema;
import org.apache.cassandra.cql3.CFName;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.exceptions.InvalidRequestException;
import org.apache.cassandra.exceptions.RequestValidationException;
import org.apache.cassandra.exceptions.UnauthorizedException;
import org.apache.cassandra.service.ClientState;
import org.apache.cassandra.service.StorageProxy;
import com.google.common.base.Predicates;
import com.google.common.collect.Maps;
/**
* Abstract class for statements that alter the schema.
*/
public abstract class SchemaAlteringStatement extends CFStatement implements CQLStatement
{
private static final long timeLimitForSchemaAgreement = 10 * 1000;
private final boolean isColumnFamilyLevel;
protected SchemaAlteringStatement()
{
super(null);
this.isColumnFamilyLevel = false;
}
protected SchemaAlteringStatement(CFName name)
{
super(name);
this.isColumnFamilyLevel = true;
}
@Override
public void prepareKeyspace(ClientState state) throws InvalidRequestException
{
if (isColumnFamilyLevel)
super.prepareKeyspace(state);
}
public Prepared prepare() throws InvalidRequestException
{
return new Prepared(this);
}
public abstract void announceMigration() throws RequestValidationException;
@Override
public void validate(ClientState state) throws RequestValidationException
{}
public ResultMessage execute(ClientState state, List<ByteBuffer> variables) throws RequestValidationException
{
try
{
announceMigration();
}
catch (ConfigurationException e)
{
InvalidRequestException ex = new InvalidRequestException(e.toString());
ex.initCause(e);
throw ex;
}
return null;
}
}