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A fork of the Apache Cassandra Project ready to embed Elasticsearch.
/*
* 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 org.apache.cassandra.db.partitions.UnfilteredPartitionIterator;
import org.apache.cassandra.io.IVersionedSerializer;
import org.apache.cassandra.net.IVerbHandler;
import org.apache.cassandra.net.MessageIn;
import org.apache.cassandra.net.MessageOut;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.service.StorageService;
import org.apache.cassandra.tracing.Tracing;
public class ReadCommandVerbHandler implements IVerbHandler
{
protected IVersionedSerializer serializer()
{
return ReadResponse.serializer;
}
public void doVerb(MessageIn message, int id)
{
if (StorageService.instance.isBootstrapMode())
{
throw new RuntimeException("Cannot service reads while bootstrapping!");
}
ReadCommand command = message.payload;
ReadResponse response;
try (ReadOrderGroup opGroup = command.startOrderGroup(); UnfilteredPartitionIterator iterator = command.executeLocally(opGroup))
{
response = command.createResponse(iterator);
}
MessageOut reply = new MessageOut<>(MessagingService.Verb.REQUEST_RESPONSE, response, serializer());
Tracing.trace("Enqueuing response to {}", message.from);
MessagingService.instance().sendReply(reply, id, message.from);
}
}