| /* |
| * 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<ReadCommand> |
| { |
| protected IVersionedSerializer<ReadResponse> serializer() |
| { |
| return ReadResponse.serializer; |
| } |
| |
| public void doVerb(MessageIn<ReadCommand> 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<ReadResponse> reply = new MessageOut<>(MessagingService.Verb.REQUEST_RESPONSE, response, serializer()); |
| |
| Tracing.trace("Enqueuing response to {}", message.from); |
| MessagingService.instance().sendReply(reply, id, message.from); |
| } |
| } |