| /* |
| * 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.service; |
| |
| import java.net.InetAddress; |
| import java.util.Collection; |
| import java.util.EnumSet; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentLinkedQueue; |
| import java.util.concurrent.CountDownLatch; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.db.Mutation; |
| import org.apache.cassandra.db.SystemKeyspace; |
| import org.apache.cassandra.db.SystemKeyspace.BootstrapState; |
| import org.apache.cassandra.exceptions.ConfigurationException; |
| import org.apache.cassandra.gms.FailureDetector; |
| import org.apache.cassandra.net.IAsyncCallback; |
| import org.apache.cassandra.net.MessageIn; |
| import org.apache.cassandra.net.MessageOut; |
| import org.apache.cassandra.net.MessagingService; |
| import org.apache.cassandra.schema.SchemaKeyspace; |
| import org.apache.cassandra.utils.WrappedRunnable; |
| |
| |
| class MigrationTask extends WrappedRunnable |
| { |
| private static final Logger logger = LoggerFactory.getLogger(MigrationTask.class); |
| |
| private static final ConcurrentLinkedQueue<CountDownLatch> inflightTasks = new ConcurrentLinkedQueue<>(); |
| |
| private static final Set<BootstrapState> monitoringBootstrapStates = EnumSet.of(BootstrapState.NEEDS_BOOTSTRAP, BootstrapState.IN_PROGRESS); |
| |
| private final InetAddress endpoint; |
| |
| MigrationTask(InetAddress endpoint) |
| { |
| this.endpoint = endpoint; |
| } |
| |
| public static ConcurrentLinkedQueue<CountDownLatch> getInflightTasks() |
| { |
| return inflightTasks; |
| } |
| |
| public void runMayThrow() throws Exception |
| { |
| if (!FailureDetector.instance.isAlive(endpoint)) |
| { |
| logger.warn("Can't send schema pull request: node {} is down.", endpoint); |
| return; |
| } |
| |
| // There is a chance that quite some time could have passed between now and the MM#maybeScheduleSchemaPull(), |
| // potentially enough for the endpoint node to restart - which is an issue if it does restart upgraded, with |
| // a higher major. |
| if (!MigrationManager.shouldPullSchemaFrom(endpoint)) |
| { |
| logger.info("Skipped sending a migration request: node {} has a higher major version now.", endpoint); |
| return; |
| } |
| |
| MessageOut message = new MessageOut<>(MessagingService.Verb.MIGRATION_REQUEST, null, MigrationManager.MigrationsSerializer.instance); |
| |
| final CountDownLatch completionLatch = new CountDownLatch(1); |
| |
| IAsyncCallback<Collection<Mutation>> cb = new IAsyncCallback<Collection<Mutation>>() |
| { |
| @Override |
| public void response(MessageIn<Collection<Mutation>> message) |
| { |
| try |
| { |
| SchemaKeyspace.mergeSchemaAndAnnounceVersion(message.payload); |
| } |
| catch (ConfigurationException e) |
| { |
| logger.error("Configuration exception merging remote schema", e); |
| } |
| finally |
| { |
| completionLatch.countDown(); |
| } |
| } |
| |
| public boolean isLatencyForSnitch() |
| { |
| return false; |
| } |
| }; |
| |
| // Only save the latches if we need bootstrap or are bootstrapping |
| if (monitoringBootstrapStates.contains(SystemKeyspace.getBootstrapState())) |
| inflightTasks.offer(completionLatch); |
| |
| MessagingService.instance().sendRR(message, endpoint, cb); |
| } |
| } |