/*
* 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.streaming;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.UUID;
import org.apache.cassandra.config.Schema;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.Keyspace;
import org.apache.cassandra.io.sstable.SSTableReader;
import org.apache.cassandra.io.sstable.SSTableWriter;
import org.apache.cassandra.service.ActiveRepairService;
import org.apache.cassandra.service.StorageService;
import org.apache.cassandra.utils.Pair;
/**
* Task that manages receiving files for the session for certain ColumnFamily.
*/
public class StreamReceiveTask extends StreamTask
{
// number of files to receive
private final int totalFiles;
// total size of files to receive
private final long totalSize;
private volatile boolean aborted;
// holds references to SSTables received
protected Collection<SSTableWriter> sstables;
public StreamReceiveTask(StreamSession session, UUID cfId, int totalFiles, long totalSize)
{
super(session, cfId);
this.totalFiles = totalFiles;
this.totalSize = totalSize;
this.sstables = new ArrayList<>(totalFiles);
}
/**
* Process received file.
*
* @param sstable SSTable file received.
*/
public void received(SSTableWriter sstable)
{
assert cfId.equals(sstable.metadata.cfId);
assert !aborted;
sstables.add(sstable);
if (sstables.size() == totalFiles)
complete();
}
public int getTotalNumberOfFiles()
{
return totalFiles;
}
public long getTotalSize()
{
return totalSize;
}
private void complete()
{
if (!sstables.isEmpty())
StorageService.tasks.submit(new OnCompletionRunnable(this));
}
private static class OnCompletionRunnable implements Runnable
{
private final StreamReceiveTask task;
public OnCompletionRunnable(StreamReceiveTask task)
{
this.task = task;
}
public void run()
{
Pair<String, String> kscf = Schema.instance.getCF(task.cfId);
ColumnFamilyStore cfs = Keyspace.open(kscf.left).getColumnFamilyStore(kscf.right);
StreamLockfile lockfile = new StreamLockfile(cfs.directories.getWriteableLocationAsFile(), UUID.randomUUID());
lockfile.create(task.sstables);
List<SSTableReader> readers = new ArrayList<>();
for (SSTableWriter writer : task.sstables)
readers.add(writer.closeAndOpenReader());
lockfile.delete();
if (!SSTableReader.acquireReferences(readers))
throw new AssertionError("We shouldn't fail acquiring a reference on a sstable that has just been transferred");
try
{
// add sstables and build secondary indexes
cfs.addSSTables(readers);
cfs.indexManager.maybeBuildSecondaryIndexes(readers, cfs.indexManager.allIndexesNames());
}
finally
{
SSTableReader.releaseReferences(readers);
}
task.session.taskCompleted(task);
}
}
public void abort()
{
aborted = true;
Runnable r = new Runnable()
{
public void run()
{
for (SSTableWriter writer : sstables)
writer.abort();
}
};
StorageService.tasks.submit(r);
}
}