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A fork of the Apache Cassandra Project ready to embed Elasticsearch.
/*
* 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.io.IOException;
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 inflightTasks = new ConcurrentLinkedQueue<>();
private static final Set monitoringBootstrapStates = EnumSet.of(BootstrapState.NEEDS_BOOTSTRAP, BootstrapState.IN_PROGRESS);
private final InetAddress endpoint;
MigrationTask(InetAddress endpoint)
{
this.endpoint = endpoint;
}
public static ConcurrentLinkedQueue getInflightTasks()
{
return inflightTasks;
}
public void runMayThrow() throws Exception
{
// 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;
}
if (!FailureDetector.instance.isAlive(endpoint))
{
logger.debug("Can't send schema pull request: node {} is down.", endpoint);
return;
}
MessageOut message = new MessageOut<>(MessagingService.Verb.MIGRATION_REQUEST, null, MigrationManager.MigrationsSerializer.instance);
final CountDownLatch completionLatch = new CountDownLatch(1);
IAsyncCallback> cb = new IAsyncCallback>()
{
@Override
public void response(MessageIn> 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);
}
}