/*
* 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.service;
import java.util.List;
import java.util.concurrent.ExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.RangeSliceCommand;
import org.apache.cassandra.db.RangeSliceReply;
import org.apache.cassandra.db.Row;
import org.apache.cassandra.db.Table;
import org.apache.cassandra.net.IVerbHandler;
import org.apache.cassandra.net.MessageIn;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.tracing.Tracing;
public class RangeSliceVerbHandler implements IVerbHandler<RangeSliceCommand>
{
private static final Logger logger = LoggerFactory.getLogger(RangeSliceVerbHandler.class);
public static List<Row> executeLocally(RangeSliceCommand command) throws ExecutionException, InterruptedException
{
ColumnFamilyStore cfs = Table.open(command.keyspace).getColumnFamilyStore(command.column_family);
if (cfs.indexManager.hasIndexFor(command.row_filter))
return cfs.search(command.row_filter, command.range, command.maxResults, command.predicate, command.maxIsColumns);
else
return cfs.getRangeSlice(command.super_column, command.range, command.maxResults, command.predicate, command.row_filter, command.maxIsColumns, command.isPaging);
}
public void doVerb(MessageIn<RangeSliceCommand> message, String id)
{
try
{
if (StorageService.instance.isBootstrapMode())
{
/* Don't service reads! */
throw new RuntimeException("Cannot service reads while bootstrapping!");
}
RangeSliceReply reply = new RangeSliceReply(executeLocally(message.payload));
logger.debug("Enqueuing response to {}", message.from);
MessagingService.instance().sendReply(reply.createMessage(), id, message.from);
}
catch (Exception ex)
{
throw new RuntimeException(ex);
}
}
}