/**
* 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.db;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.net.IVerbHandler;
import org.apache.cassandra.net.Message;
import org.apache.cassandra.net.MessagingService;
/**
* Handles the TRUNCATE verb
*
* @author rantav@gmail.com
*
*/
public class TruncateVerbHandler implements IVerbHandler
{
private static Logger logger = LoggerFactory.getLogger(TruncateVerbHandler.class);
public void doVerb(Message message, String id)
{
byte[] bytes = message.getMessageBody();
ByteArrayInputStream buffer = new ByteArrayInputStream(bytes);
try
{
Truncation t = Truncation.serializer().deserialize(new DataInputStream(buffer));
logger.debug("Applying {}", t);
try
{
Table.open(t.keyspace).truncate(t.columnFamily);
}
catch (IOException e)
{
logger.error("Error in truncation", e);
respondError(t, message);
throw e;
}
catch (InterruptedException e)
{
logger.error("Error in truncation", e);
respondError(t, message);
throw e;
}
catch (ExecutionException e)
{
logger.error("Error in truncation", e);
respondError(t, message);
throw e;
}
logger.debug("Truncate operation succeeded at this host");
TruncateResponse response = new TruncateResponse(t.keyspace, t.columnFamily, true);
Message responseMessage = TruncateResponse.makeTruncateResponseMessage(message, response);
logger.debug("{} applied. Sending response to {}@{} ", new Object[]{ t, id, message.getFrom()});
MessagingService.instance().sendReply(responseMessage, id, message.getFrom());
}
catch (IOException e)
{
logger.error("Error in truncation", e);
throw new RuntimeException("Error in truncation", e);
}
catch (InterruptedException e)
{
logger.error("Error in truncation", e);
throw new RuntimeException("Error in truncation", e);
}
catch (ExecutionException e)
{
logger.error("Error in truncation", e);
throw new RuntimeException("Error in truncation", e);
}
}
private static void respondError(Truncation t, Message truncateRequestMessage) throws IOException
{
TruncateResponse response = new TruncateResponse(t.keyspace, t.columnFamily, false);
Message responseMessage = TruncateResponse.makeTruncateResponseMessage(truncateRequestMessage, response);
MessagingService.instance().sendOneWay(responseMessage, truncateRequestMessage.getFrom());
}
}