| /* |
| * 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.util.Collection; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| 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.schema.LegacySchemaTables; |
| import org.apache.cassandra.service.MigrationManager; |
| |
| /** |
| * Sends it's current schema state in form of mutations in reply to the remote node's request. |
| * Such a request is made when one of the nodes, by means of Gossip, detects schema disagreement in the ring. |
| */ |
| public class MigrationRequestVerbHandler implements IVerbHandler |
| { |
| private static final Logger logger = LoggerFactory.getLogger(MigrationRequestVerbHandler.class); |
| |
| public void doVerb(MessageIn message, int id) |
| { |
| logger.trace("Received migration request from {}.", message.from); |
| MessageOut<Collection<Mutation>> response = new MessageOut<>(MessagingService.Verb.INTERNAL_RESPONSE, |
| LegacySchemaTables.convertSchemaToMutations(), |
| MigrationManager.MigrationsSerializer.instance); |
| MessagingService.instance().sendReply(response, id, message.from); |
| } |
| } |