| /* |
| * 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.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.net.IVerbHandler; |
| import org.apache.cassandra.net.MessageIn; |
| import org.apache.cassandra.net.MessagingService; |
| import org.apache.cassandra.service.StorageProxy; |
| import org.apache.cassandra.utils.FBUtilities; |
| |
| public class CounterMutationVerbHandler implements IVerbHandler<CounterMutation> |
| { |
| private static final Logger logger = LoggerFactory.getLogger(CounterMutationVerbHandler.class); |
| |
| public void doVerb(final MessageIn<CounterMutation> message, final int id) |
| { |
| long queryStartNanoTime = System.nanoTime(); |
| final CounterMutation cm = message.payload; |
| logger.trace("Applying forwarded {}", cm); |
| |
| String localDataCenter = DatabaseDescriptor.getEndpointSnitch().getDatacenter(FBUtilities.getBroadcastAddress()); |
| // We should not wait for the result of the write in this thread, |
| // otherwise we could have a distributed deadlock between replicas |
| // running this VerbHandler (see #4578). |
| // Instead, we use a callback to send the response. Note that the callback |
| // will not be called if the request timeout, but this is ok |
| // because the coordinator of the counter mutation will timeout on |
| // it's own in that case. |
| StorageProxy.applyCounterMutationOnLeader(cm, localDataCenter, new Runnable() |
| { |
| public void run() |
| { |
| MessagingService.instance().sendReply(WriteResponse.createMessage(), id, message.from); |
| } |
| }, queryStartNanoTime); |
| } |
| } |