| /* |
| * 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.DataInputStream; |
| import java.io.IOException; |
| import java.net.InetAddress; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.io.util.FastByteArrayInputStream; |
| import org.apache.cassandra.net.*; |
| import org.apache.cassandra.tracing.Tracing; |
| |
| public class RowMutationVerbHandler implements IVerbHandler<RowMutation> |
| { |
| private static final Logger logger = LoggerFactory.getLogger(RowMutationVerbHandler.class); |
| |
| public void doVerb(MessageIn<RowMutation> message, int id) |
| { |
| try |
| { |
| RowMutation rm = message.payload; |
| |
| // Check if there were any forwarding headers in this message |
| byte[] from = message.parameters.get(RowMutation.FORWARD_FROM); |
| InetAddress replyTo; |
| if (from == null) |
| { |
| replyTo = message.from; |
| byte[] forwardBytes = message.parameters.get(RowMutation.FORWARD_TO); |
| if (forwardBytes != null) |
| forwardToLocalNodes(rm, message.verb, forwardBytes, message.from, message.version); |
| } |
| else |
| { |
| replyTo = InetAddress.getByAddress(from); |
| } |
| |
| rm.apply(); |
| WriteResponse response = new WriteResponse(); |
| Tracing.trace("Enqueuing response to {}", replyTo); |
| MessagingService.instance().sendReply(response.createMessage(), id, replyTo); |
| } |
| catch (IOException e) |
| { |
| logger.error("Error in row mutation", e); |
| } |
| } |
| |
| /** |
| * Older version (< 1.0) will not send this message at all, hence we don't |
| * need to check the version of the data. |
| */ |
| private void forwardToLocalNodes(RowMutation rm, MessagingService.Verb verb, byte[] forwardBytes, InetAddress from, int version) throws IOException |
| { |
| DataInputStream in = new DataInputStream(new FastByteArrayInputStream(forwardBytes)); |
| int size = in.readInt(); |
| |
| // tell the recipients who to send their ack to |
| MessageOut<RowMutation> message = new MessageOut<RowMutation>(verb, rm, RowMutation.serializer).withParameter(RowMutation.FORWARD_FROM, from.getAddress()); |
| // Send a message to each of the addresses on our Forward List |
| for (int i = 0; i < size; i++) |
| { |
| InetAddress address = CompactEndpointSerializationHelper.deserialize(in); |
| int id; |
| if (version < MessagingService.VERSION_20) |
| { |
| String s = in.readUTF(); |
| id = Integer.parseInt(s); |
| } |
| else |
| { |
| id = in.readInt(); |
| } |
| Tracing.trace("Enqueuing forwarded write to {}", address); |
| MessagingService.instance().sendOneWay(message, id, address); |
| } |
| } |
| } |